IEEE 802.11n-2009

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IEEE Standard for Information technology– Local and metropolitan area networks– Specific requirements– Part 11: Wireless LAN Medium Access Control (MAC)and Physical Layer (PHY) Specifications Amendment 5: Enhancements for Higher Throughput

Published By	Publication Date	Number of Pages
IEEE	2009	536

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Description

Amendment Standard – Superseded. This amendment defines modifications to both the 802.11 physical layers (PHY) and the 802.11 Medium Access Control Layer (MAC) so that modes of operation can be enabled that are capable of much higher throughputs, with a maximum throughput of at least 100Mb/s, as measured at the MAC data service access point (SAP).

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std 802.11n™-2009
3	Title page
6	Introduction Notice to users Laws and regulations Copyrights Updating of IEEE documents Errata Interpretations
7	Patents Participants
13	Contents
29	List of figures
31	List of tables
35	Important notice 2. Normative references
36	3. Definitions
37	3A. Definitions specific to IEEE 802.11
42	4. Abbreviations and acronyms
44	5. General description 5.2 Components of the IEEE 802.11 architecture 5.2.9 High-throughput (HT) station (STA) 6. MAC service definition 6.1 Overview of MAC services 6.1.5 MAC data service architecture
46	7. Frame formats 7.1 MAC frame formats 7.1.1 Conventions 7.1.2 General frame format
47	7.1.3 Frame fields 7.1.3.1 Frame Control field 7.1.3.1.2 Type and Subtype fields 7.1.3.1.6 Power Management field 7.1.3.1.7 More Data field
48	7.1.3.1.9 Order field 7.1.3.2 Duration/ID field 7.1.3.3 Address fields 7.1.3.3.3 BSSID (BSS identification) field 7.1.3.3.4 DA (destination address) field 7.1.3.3.5 SA (source address) field
49	7.1.3.4 Sequence Control field 7.1.3.4.1 Sequence Number field 7.1.3.4.2 Fragment Number field 7.1.3.5 QoS Control field
50	7.1.3.5.1 TID subfield
51	7.1.3.5.3 Ack Policy subfield
52	7.1.3.5.5 Queue Size subfield 7.1.3.5.6 TXOP Duration Requested subfield 7.1.3.5.7 AP PS Buffer State subfield 7.1.3.5.8 A-MSDU Present subfield 7.1.3.5a HT Control field
57	7.1.3.6 Frame Body field 7.1.4 Duration/ID field (QoS STA) 7.1.4.1 General 7.1.4.2 Setting for single and multiple protection under enhanced distributed channel access (EDCA)
58	7.1.4.3 Setting for QoS CF-Poll frames
59	7.1.4.4 Setting for frames sent by a TXOP holder under HCCA 7.1.4.5 Settings within a PSMP sequence 7.1.4.6 Settings within a dual CTS sequence
60	7.1.4.7 Setting for control response frames 7.1.4.8 Setting for other response frames 7.2 Format of individual frame types 7.2.1 Control frames 7.2.1.1 RTS frame format
61	7.2.1.2 CTS frame format 7.2.1.3 ACK frame format 7.2.1.7 BlockAckReq frame format 7.2.1.7.1 Overview
63	7.2.1.7.2 Basic BlockAckReq variant 7.2.1.7.3 Compressed BlockAckReq variant
64	7.2.1.7.4 Multi-TID BlockAckReq variant 7.2.1.8 Block Ack (BlockAck) frame format 7.2.1.8.1 Overview
66	7.2.1.8.2 Basic BlockAck variant
67	7.2.1.8.3 Compressed BlockAck variant 7.2.1.8.4 Multi-TID BlockAck variant
68	7.2.1.9 Control Wrapper frame
69	7.2.2 Data frames 7.2.2.1 Data frame format
70	7.2.2.2 A-MSDU format
71	7.2.3 Management frames
72	7.2.3.1 Beacon frame format
73	7.2.3.4 Association Request frame format 7.2.3.5 Association Response frame format
74	7.2.3.6 Reassociation Request frame format 7.2.3.7 Reassociation Response frame format 7.2.3.8 Probe Request frame format
75	7.2.3.9 Probe Response frame format 7.2.3.13 Action No Ack frame format
76	7.3 Management frame body components 7.3.1 Fields that are not information elements 7.3.1.7 Reason Code field 7.3.1.9 Status Code field 7.3.1.11 Action field
77	7.3.1.14 Block Ack Parameter Set field 7.3.1.17 QoS Info field
78	7.3.1.21 Channel Width field
79	7.3.1.22 SM Power Control field 7.3.1.23 PCO Phase Control field
80	7.3.1.24 PSMP Parameter Set field 7.3.1.25 PSMP STA Info field
81	7.3.1.26 MIMO Control field
83	7.3.1.27 CSI Report field
85	7.3.1.28 Noncompressed Beamforming Report field
87	7.3.1.29 Compressed Beamforming Report field
89	7.3.1.30 Antenna Selection Indices field
90	7.3.2 Information elements 7.3.2.2 Supported Rates element
92	7.3.2.14 Extended Supported Rates element 7.3.2.20a Secondary Channel Offset element
93	7.3.2.21 Measurement Request element 7.3.2.21.8 STA Statistics Request 7.3.2.22 Measurement Report element 7.3.2.22.6 Beacon Report
94	7.3.2.22.8 STA Statistics Report
95	7.3.2.25 RSN information element 7.3.2.25.3 RSN capabilities
96	7.3.2.27 Extended Capabilities information element
97	7.3.2.28 BSS Load element 7.3.2.29 EDCA Parameter Set element
98	7.3.2.30 TSPEC element
100	7.3.2.37 Neighbor Report element
101	7.3.2.56 HT Capabilities element 7.3.2.56.1 HT Capabilities element structure
102	7.3.2.56.2 HT Capabilities Info field
104	7.3.2.56.3 A-MPDU Parameters field 7.3.2.56.4 Supported MCS Set field
105	7.3.2.56.5 HT Extended Capabilities field
107	7.3.2.56.6 Transmit Beamforming Capabilities
109	7.3.2.56.7 ASEL Capability field
110	7.3.2.57 HT Operation element
113	7.3.2.58 20/40 BSS Intolerant Channel Report element
114	7.3.2.59 Overlapping BSS Scan Parameters element
115	7.3.2.60 20/40 BSS Coexistence element
116	7.4 Action frame format details 7.4.1 Spectrum management action details 7.4.1.5 Channel Switch Announcement frame format 7.4.3 DLS Action frame details 7.4.3.1 DLS Request frame format 7.4.3.2 DLS Response frame format
117	7.4.4 Block Ack Action frame details 7.4.7 Public Action details 7.4.7.1 Public Action frames 7.4.7.1a 20/40 BSS Coexistence Management frame format
118	7.4.10 HT Action frame details 7.4.10.1 HT Action field 7.4.10.2 Notify Channel Width frame format
119	7.4.10.3 SM Power Save frame format 7.4.10.4 PSMP frame format
120	7.4.10.5 Set PCO Phase frame format 7.4.10.6 CSI frame format
121	7.4.10.7 Noncompressed Beamforming frame format 7.4.10.8 Compressed Beamforming frame format
122	7.4.10.9 Antenna Selection Indices Feedback frame format 7.4a Aggregate MPDU (A-MPDU) 7.4a.1 A-MPDU format
123	7.4a.2 MPDU delimiter CRC field
124	7.4a.3 A-MPDU contents
127	7.5 Frame usage
128	8. Security 8.1 Framework 8.1.5 RSNA assumptions and constraints 8.3 RSNA data confidentiality protocols 8.3.3 CTR with CBC-MAC Protocol (CCMP) 8.3.3.3 CCMP cryptographic encapsulation 8.3.3.3.2 Construct AAD
129	8.3.3.3.5 CCM originator processing 8.3.3.4 CCMP decapsulation 8.3.3.4.3 PN and replay detection 8.4 RSNA security association management 8.4.3 RSNA policy selection in an ESS
130	8.4.4 RSNA policy selection in an IBSS and for DLS 8.7 Per-frame pseudo-code 8.7.2 RSNA frame pseudo-code 8.7.2.1 Per-MSDU/Per-A-MSDU Tx pseudo-code
131	8.7.2.2 Per-MPDU Tx pseudo-code
132	8.7.2.4 Per-MSDU/A-MSDU Rx pseudo-code
133	9. MAC sublayer functional description 9.1 MAC architecture 9.1.3 Hybrid coordination function (HCF) 9.1.3.1 HCF contention-based channel access (EDCA) 9.1.5 Fragmentation/defragmentation overview
134	9.1.6 MAC data service 9.2 DCF 9.2.2 MAC-Level acknowledgments 9.2.3 IFS 9.2.3.0a Overview
135	9.2.3.0b RIFS 9.2.3.1 SIFS 9.2.3.2 PIFS
136	9.2.3.5 EIFS 9.2.4 Random backoff time 9.2.5 DCF access procedure 9.2.5.1 Basic access 9.2.5.3 Recovery procedures and retransmit limits
137	9.2.5.4 Setting and resetting the NAV 9.2.5.5a Dual CTS protection 9.2.5.5a.1 Dual CTS protection procedure
139	9.2.5.5a.2 Dual CTS protection examples 9.2.5.7 CTS procedure 9.2.6 Individually addressed MPDU transfer procedure
140	9.2.7 Broadcast and multicast MPDU transfer procedure 9.2.8 ACK procedure 9.2.8a BlockAck procedure 9.2.9 Duplicate detection and recovery
141	9.2.10 DCF timing relations 9.2.10a Signal Extension 9.6 Multirate support 9.6.0a Overview
142	9.6.0b Basic MCS Set field 9.6.0c Basic STBC MCS 9.6.0d Rate selection for data and management frames 9.6.0d.1 Rate selection for non-STBC Beacon and non-STBC PSMP frames
143	9.6.0d.2 Rate selection for STBC group-addressed data and management frames 9.6.0d.3 Rate selection for other group-addressed data and management frames 9.6.0d.4 Rate selection for polling frames 9.6.0d.5 Rate selection for +CF-Ack frames 9.6.0d.6 Rate selection for other data and management frames
144	9.6.0e Rate selection for control frames 9.6.0e.1 General rules for rate selection for control frames
145	9.6.0e.2 Rate selection for control frames that initiate a TXOP 9.6.0e.3 Rate selection for CF_End control frames
146	9.6.0e.4 Rate selection for control frames that are not control response frames 9.6.0e.5 Rate selection for control response frames 9.6.0e.5.1 Introduction 9.6.0e.5.2 Selection of a rate or MCS
147	9.6.0e.5.3 Control response frame MCS computation
149	9.6.0e.5.4 Selection of an alternate rate or MCS for a control response frame 9.6.0e.5.5 Control response frame TXVECTOR parameter restrictions 9.6.0e.6 Channel Width selection for control frames
150	9.6.0e.7 Control frame TXVECTOR parameter restrictions 9.6.1 Modulation classes
151	9.6.2 Non-HT basic rate calculation
152	9.7 MSDU transmission restrictions 9.7a HT Control field operation
153	9.7b Control Wrapper operation 9.7c A-MSDU operation 9.7d A-MPDU operation 9.7d.1 A-MPDU contents
154	9.7d.2 A-MPDU length limit rules 9.7d.3 Minimum MPDU Start Spacing field 9.7d.4 A-MPDU aggregation of group-addressed data frames
155	9.7d.5 Transport of A-MPDU by the PHY data service 9.7e PPDU duration constraint 9.7f LDPC operation 9.7g STBC operation 9.7h Short GI operation
156	9.7i Greenfield operation 9.9 HCF 9.9.1 HCF contention-based channel access (EDCA) 9.9.1.2 EDCA TXOPs
157	9.9.1.4 Multiple frame transmission in an EDCA TXOP
158	9.9.1.5 EDCA backoff procedure
159	9.9.1.6 Retransmit procedures
160	9.9.1.7 Truncation of TXOP
161	9.9.2 HCCA 9.9.2.1 HCCA procedure 9.9.2.1.3 Recovery from the absence of an expected reception 9.9.2.2 TXOP structure and timing
162	9.9.2.3 HCCA transfer rules 9.10 Block Acknowledgment (Block Ack) 9.10.1 Introduction 9.10.2 Setup and modification of the Block Ack parameters
163	9.10.3 Data and acknowledgment transfer using immediate Block Ack policy and delayed Block Ack policy
166	9.10.4 Receive buffer operation 9.10.6 Selection of BlockAck and BlockAckReq variants
167	9.10.7 HT-immediate Block Ack extensions 9.10.7.1 Introduction to HT-immediate Block Ack extensions 9.10.7.2 HT-immediate Block Ack architecture
168	9.10.7.3 Scoreboard context control during full-state operation
169	9.10.7.4 Scoreboard context control during partial-state operation
170	9.10.7.5 Generation and transmission of BlockAck by an HT STA
171	9.10.7.6 Receive reordering buffer control operation 9.10.7.6.1 General 9.10.7.6.2 Operation for each received data MPDU
172	9.10.7.6.3 Operation for each received BlockAckReq 9.10.7.7 Originator’s behavior
173	9.10.7.8 Maintaining BlockAck state at the originator 9.10.7.9 Originator’s support of recipient’s partial state
174	9.10.8 HT-delayed Block Ack extensions 9.10.8.1 Introduction 9.10.8.2 HT-delayed Block Ack negotiation 9.10.8.3 Operation of HT-delayed Block Ack 9.10.9 Protected Block Ack Agreement
175	9.12 Frame exchange sequences 9.13 Protection mechanisms 9.13.1 Introduction 9.13.2 Protection mechanism for non-ERP receivers
176	9.13.3 Protection mechanisms for transmissions of HT PPDUs 9.13.3.1 General
178	9.13.3.2 Protection rules for HT STA operating a direct link 9.13.3.3 RIFS protection 9.13.3.4 Use of OBSS Non-HT STAs Present field
179	9.13.4 L_LENGTH and L_DATARATE parameter values for HT-mixed format PPDUs
180	9.13.5 L-SIG TXOP protection 9.13.5.1 General rules
182	9.13.5.2 L-SIG TXOP protection rules at the TXOP holder
183	9.13.5.3 L-SIG TXOP protection rules at the TXOP responder 9.13.5.4 L-SIG TXOP protection NAV update rule
184	9.15 Reverse Direction Protocol 9.15.1 Reverse direction (RD) exchange sequence 9.15.2 Support for RD 9.15.3 Rules for RD initiator
185	9.15.4 Rules for RD responder
187	9.16 PSMP Operation 9.16.1 Frame transmission mechanism during PSMP 9.16.1.1 PSMP frame transmission (PSMP-DTT and PSMP-UTT)
188	9.16.1.2 PSMP downlink transmission (PSMP-DTT) 9.16.1.3 PSMP uplink transmission (PSMP-UTT)
190	9.16.1.4 PSMP burst
191	9.16.1.5 Resource allocation within a PSMP burst
192	9.16.1.6 PSMP-UTT retransmission 9.16.1.7 PSMP acknowledgment rules
194	9.16.1.8 PSMP group-addressed transmission rules 9.16.1.8.1 Rules at the AP 9.16.1.8.2 Rules at the STA 9.16.2 Scheduled PSMP
195	9.16.3 Unscheduled PSMP 9.17 Sounding PPDUs
196	9.18 Link adaptation 9.18.1 Introduction 9.18.2 Link adaptation using the HT Control field
198	9.19 Transmit beamforming 9.19.1 General
199	9.19.2 Transmit beamforming with implicit feedback 9.19.2.1 General
200	9.19.2.2 Unidirectional implicit transmit beamforming
201	9.19.2.3 Bidirectional implicit transmit beamforming
202	9.19.2.4 Calibration 9.19.2.4.1 Introduction
203	9.19.2.4.2 Calibration capabilities
204	9.19.2.4.3 Sounding exchange for calibration
206	9.19.2.4.4 CSI reporting for calibration
207	9.19.3 Explicit feedback beamforming
211	9.20 Antenna selection (ASEL) 9.20.1 Introduction 9.20.2 Procedure
215	9.21 Null data packet (NDP) sounding 9.21.1 NDP rules
216	9.21.2 Transmission of an NDP 9.21.3 Determination of NDP destination
217	9.21.4 Determination of NDP source
218	10. Layer management 10.3 MLME SAP interface 10.3.2 Scan 10.3.2.2 MLME-SCAN.confirm 10.3.2.2.2 Semantics of the service primitive
221	10.3.3 Synchronization 10.3.3.1 MLME-JOIN.request 10.3.3.1.2 Semantics of the service primitive 10.3.3.1.4 Effect of receipt
222	10.3.6 Associate 10.3.6.1 MLME-ASSOCIATE.request 10.3.6.1.2 Semantics of the service primitive
223	10.3.6.2 MLME-ASSOCIATE.confirm 10.3.6.2.2 Semantics of the service primitive
224	10.3.6.3 MLME-ASSOCIATE.indication 10.3.6.3.2 Semantics of the service primitive
225	10.3.6.4 MLME-ASSOCIATE.response 10.3.6.4.2 Semantics of the service primitive
226	10.3.7 Reassociate 10.3.7.1 MLME-REASSOCIATE.request 10.3.7.1.2 Semantics of the service primitive
227	10.3.7.2 MLME-REASSOCIATE.confirm 10.3.7.2.2 Semantics of the service primitive
228	10.3.7.3 MLME-REASSOCIATE.indication 10.3.7.3.2 Semantics of the service primitive
229	10.3.7.4 MLME-REASSOCIATE.response 10.3.7.4.2 Semantics of the service primitive
230	10.3.10 Start 10.3.10.1 MLME-START.request 10.3.10.1.2 Semantics of the service primitive
231	10.3.10.1.4 Effect of receipt
232	10.3.15 Channel switch 10.3.15.1 MLME-CHANNELSWITCH.request 10.3.15.1.2 Semantics of the service primitive
233	10.3.15.3 MLME-CHANNELSWITCH.indication 10.3.15.3.2 Semantics of the service primitive 10.3.15.4 MLME-CHANNELSWITCH.response 10.3.15.4.2 Semantics of the service primitive
234	10.3.24 TS management interface 10.3.24.5 MLME-DELTS.request 10.3.24.5.2 Semantics of the service primitive 10.3.24.7 MLME-DELTS.indication 10.3.24.7.2 Semantics of the service primitive
235	10.3.25 Management of direct links 10.3.25.2 MLME-DLS.confirm 10.3.25.2.2 Semantics of the service primitive 10.3.25.3 MLME-DLS.indication 10.3.25.3.2 Semantics of the service primitive
236	10.4 PLME SAP interface 10.4.3 PLME-CHARACTERISTICS.confirm 10.4.3.2 Semantics of the service primitive
239	10.4.6 PLME-TXTIME.request 10.4.6.1 Function 10.4.6.2 Semantics of the service primitive 10.4.6.3 When generated
240	11. MLME 11.1 Synchronization 11.1.2 Maintaining synchronization 11.1.2.1 Beacon generation in infrastructure networks 11.1.3 Acquiring synchronization, scanning 11.1.3.4 Synchronizing with a BSS
241	11.1.4 Adjusting STA timers 11.1.6 Supported rates and extended supported rates advertisement
242	11.2 Power management 11.2.1 Power management in an infrastructure network
243	11.2.1.1 STA Power Management modes 11.2.1.2 AP TIM transmissions 11.2.1.3 TIM types 11.2.1.4 Power management with APSD
244	11.2.1.5 AP operation during the CP
246	11.2.1.6 AP operation during the CFP
247	11.2.1.7 Receive operation for STAs in PS mode during the CP 11.2.1.8 Receive operation for STAs in PS mode during the CFP
248	11.2.1.9 Receive operation for non-AP STAs using APSD 11.2.1.12 PSMP power management
249	11.2.2 Power management in an IBSS 11.2.2.1 Basic approach
250	11.2.2.3 STA power state transitions 11.2.2.4 ATIM and frame transmission
251	11.2.3 SM power save
252	11.3 STA authentication and association 11.3.2 Association, reassociation, and disassociation 11.3.2.2 AP association procedures 11.3.2.4 AP reassociation procedures 11.4 TS operation 11.4.4b PSMP management
253	11.4.7 TS deletion
254	11.5 Block Ack operation 11.5.1 Setup and modification of the Block Ack parameters 11.5.1.1 Procedure at the originator 11.5.1.3 Procedure common to both originator and recipient
255	11.6 Higher layer timer synchronization 11.6.2 Procedure at the STA 11.7 DLS operation 11.7.1 DLS procedures 11.7.1.2 Setup procedure at the AP 11.7.2 Data transfer after setup
256	11.9 DFS procedures 11.9.2 Quieting channels for testing 11.9.6 Requesting and reporting of measurements 11.9.7 Selecting and advertising a new channel 11.9.7.2 Selecting and advertising a new channel in an IBSS
257	11.9.7.3 HT-greenfield transmissions in regulatory classes with behavior limits set of 16 11.14 20/40 MHz BSS operation 11.14.1 Rules for operation in 20/40 MHz BSS
258	11.14.2 Basic 20/40 MHz BSS functionality 11.14.3 Channel selection methods for 20/40 MHz operation 11.14.3.1 General 11.14.3.2 Scanning requirements for a 20/40 MHz BSS
260	11.14.3.3 Channel management at the AP and in an IBSS
262	11.14.4 40 MHz PPDU transmission restrictions 11.14.4.1 Fields used to determine 40 MHz PPDU transmission restrictions
263	11.14.4.2 Infrastructure non-AP STA restrictions
264	11.14.4.3 AP restrictions
265	11.14.4.4 Restrictions on non-AP STAs that are not infrastructure BSS members 11.14.5 Scanning requirements for 40-MHz-capable STA
266	11.14.6 Exemption from OBSS scanning
267	11.14.7 Communicating 20/40 BSS coexistence information 11.14.8 Support of DSSS/CCK in 40 MHz 11.14.9 STA CCA sensing in a 20/40 MHz BSS
268	11.14.10 NAV assertion in 20/40 MHz BSS 11.14.11 Signaling 40 MHz intolerance 11.14.12 Switching between 40 MHz and 20 MHz
270	11.15 Phased coexistence operation (PCO) 11.15.1 General description of PCO
271	11.15.2 Operation at a PCO active AP
273	11.15.3 Operation at a PCO active non-AP STA 11.16 20/40 BSS Coexistence Management frame usage
274	11.17 RSNA A-MSDU procedures
275	11.18 Public Action frame addressing
276	12. PHY service specification 12.3 Detailed PHY service specifications 12.3.4 Basic service and options 12.3.4.2 PHY-SAP sublayer-to-sublayer service primitives 12.3.4.3 PHY-SAP service primitives parameters 12.3.4.4 Vector descriptions
277	12.3.5 PHY-SAP detailed service specification 12.3.5.4 PHY-TXSTART.request 12.3.5.4.1 Function 12.3.5.4.2 Semantics of the service primitive 12.3.5.4.3 When generated 12.3.5.6 PHY-TXEND.request 12.3.5.6.1 Function
278	12.3.5.6.3 When generated 12.3.5.7 PHY-TXEND.confirm 12.3.5.7.3 When generated 12.3.5.10 PHY-CCA.indication 12.3.5.10.2 Semantics of the service primitive 12.3.5.10.3 When generated
279	12.3.5.12 PHY-RXEND.indication 12.3.5.12.1 Function 12.3.5.12.2 Semantics of the service primitive 12.3.5.13 PHY-CONFIG.request 12.3.5.13.1 Function 12.3.5.13.2 Semantics of the service primitive 12.3.5.13.3 When generated 12.3.5.13.4 Effect of receipt 12.3.5.14 PHY-CONFIG.confirm 12.3.5.14.1 Function
280	12.3.5.14.2 Semantics of the service primitive 12.3.5.14.3 When generated 12.3.5.14.4 Effect of receipt
281	20. High Throughput (HT) PHY specification 20.1 Introduction 20.1.1 Introduction to the HT PHY 20.1.2 Scope
282	20.1.3 HT PHY functions 20.1.3.1 HT PLCP sublayer 20.1.3.2 HT PMD sublayer 20.1.3.3 PHY management entity (PLME) 20.1.3.4 Service specification method 20.1.4 PPDU formats
283	20.2 HT PHY service interface 20.2.1 Introduction 20.2.2 TXVECTOR and RXVECTOR parameters
289	20.2.3 Effect of CH_BANDWIDTH, CH_OFFSET, and MCS parameters on PPDU format
290	20.2.4 Support for NON_HT formats
292	20.3 HT PLCP sublayer 20.3.1 Introduction 20.3.2 PPDU format
294	20.3.3 Transmitter block diagram
296	20.3.4 Overview of the PPDU encoding process
299	20.3.5 Modulation and coding scheme (MCS) 20.3.6 Timing-related parameters
301	20.3.7 Mathematical description of signals
304	20.3.8 Transmission in the upper/lower 20 MHz of a 40 MHz channel 20.3.9 HT preamble 20.3.9.1 Introduction
305	20.3.9.2 HT-mixed format preamble 20.3.9.3 Non-HT portion of the HT-mixed format preamble 20.3.9.3.1 Introduction 20.3.9.3.2 Cyclic shift definition
306	20.3.9.3.3 L-STF definition
307	20.3.9.3.4 L-LTF definition 20.3.9.3.5 L-SIG definition
309	20.3.9.4 HT portion of HT-mixed format preamble 20.3.9.4.1 Introduction 20.3.9.4.2 Cyclic shift definition 20.3.9.4.3 HT-SIG definition
313	20.3.9.4.4 CRC calculation for HT-SIG 20.3.9.4.5 HT-STF definition
314	20.3.9.4.6 HT-LTF definition
318	20.3.9.5 HT-greenfield format preamble 20.3.9.5.1 Cyclic shift definition for HT-greenfield format preamble
319	20.3.9.5.2 HT-GF-STF definition 20.3.9.5.3 HT-greenfield format HT-SIG
320	20.3.9.5.4 HT-greenfield format LTF
321	20.3.10 Transmission of NON_HT format PPDUs with more than one antenna 20.3.11 Data field
322	20.3.11.1 SERVICE field 20.3.11.2 Scrambler 20.3.11.3 Coding 20.3.11.4 Encoder parsing operation for two BCC FEC encoders 20.3.11.5 Binary convolutional coding and puncturing
323	20.3.11.6 LDPC codes 20.3.11.6.1 Introduction 20.3.11.6.2 LDPC coding rates and codeword block lengths
324	20.3.11.6.3 LDPC encoder 20.3.11.6.4 Parity-check matrices
325	20.3.11.6.5 LDPC PPDU encoding process
327	20.3.11.6.6 LDPC parser 20.3.11.7 Data interleaver 20.3.11.7.1 Overview 20.3.11.7.2 Stream parser
328	20.3.11.7.3 Frequency interleaver
329	20.3.11.8 Constellation mapping
330	20.3.11.8.1 Space-time block coding (STBC)
331	20.3.11.9 Pilot subcarriers
332	20.3.11.10 OFDM modulation 20.3.11.10.1 Spatial mapping
335	20.3.11.10.2 Transmission in 20 MHz HT format 20.3.11.10.3 Transmission in 40 MHz HT format
336	20.3.11.10.4 Transmission in MCS 32 format
337	20.3.11.10.5 Transmission with a short GI 20.3.11.11 Non-HT duplicate transmission 20.3.12 Beamforming
338	20.3.12.1 Implicit feedback beamforming
340	20.3.12.2 Explicit feedback beamforming
341	20.3.12.2.1 CSI matrices feedback 20.3.12.2.2 CSI matrices feedback decoding procedure 20.3.12.2.3 Example of CSI matrices feedback encoding
342	20.3.12.2.4 Noncompressed beamforming feedback matrix 20.3.12.2.5 Compressed beamforming feedback matrix
344	20.3.13 HT Preamble format for sounding PPDUs
345	20.3.13.1 Sounding with a NDP 20.3.13.2 Sounding PPDU for calibration
346	20.3.13.3 Sounding PPDU for channel quality assessment
347	20.3.14 Regulatory requirements 20.3.15 Channel numbering and channelization 20.3.15.1 Channel allocation in the 2.4 GHz Band 20.3.15.2 Channel allocation in the 5 GHz band 20.3.15.3 40 MHz channelization
348	20.3.16 Transmit and receive in-band and out-of-band spurious transmissions 20.3.17 Transmitter RF delay 20.3.18 Slot time 20.3.19 Transmit and receive port impedance 20.3.20 Transmit and receive operating temperature range 20.3.21 PMD transmit specification 20.3.21.1 Transmit spectrum mask
349	20.3.21.2 Spectral flatness
350	20.3.21.3 Transmit power 20.3.21.4 Transmit center frequency tolerance 20.3.21.5 Packet alignment 20.3.21.6 Symbol clock frequency tolerance
351	20.3.21.7 Modulation accuracy 20.3.21.7.1 Introduction to modulation accuracy tests 20.3.21.7.2 Transmit center frequency leakage 20.3.21.7.3 Transmitter constellation error 20.3.21.7.4 Transmitter modulation accuracy (EVM) test
352	20.3.22 HT PMD receiver specification 20.3.22.1 Receiver minimum input sensitivity
353	20.3.22.2 Adjacent channel rejection 20.3.22.3 Nonadjacent channel rejection
354	20.3.22.4 Receiver maximum input level 20.3.22.5 CCA sensitivity 20.3.22.5.1 CCA sensitivity in 20 MHz 20.3.22.5.2 CCA sensitivity in 40 MHz
355	20.3.22.6 Received channel power indicator (RCPI) measurement 20.3.22.7 Reduced interframe space (RIFS)
356	20.3.23 PLCP transmit procedure
358	20.3.24 PLCP receive procedure
363	20.4 HT PLME 20.4.1 PLME_SAP sublayer management primitives 20.4.2 PHY MIB
368	20.4.3 TXTIME calculation
369	20.4.4 PHY characteristics
370	20.5 HT PMD sublayer 20.5.1 Scope and field of application 20.5.2 Overview of service
371	20.5.3 Overview of interactions 20.5.4 Basic service and options 20.5.4.1 Status of service primitives 20.5.4.2 PMD_SAP peer-to-peer service primitives
372	20.5.4.3 PMD_SAP sublayer-to-sublayer service primitives 20.5.4.4 PMD_SAP service primitive parameters
373	20.5.5 PMD_SAP detailed service specification 20.5.5.1 Introduction to PMD_SAP service specification 20.5.5.2 PMD_DATA.request 20.5.5.2.1 Function 20.5.5.2.2 Semantics of the service primitive
374	20.5.5.2.3 When generated 20.5.5.2.4 Effect of receipt 20.5.5.3 PMD_DATA.indication 20.5.5.3.1 Function 20.5.5.3.2 Semantics of the service primitive 20.5.5.3.3 When generated 20.5.5.3.4 Effect of receipt 20.5.5.4 PMD_TXSTART.request 20.5.5.4.1 Function 20.5.5.4.2 Semantics of the service primitive
375	20.5.5.4.3 When generated 20.5.5.4.4 Effect of receipt 20.5.5.5 PMD_TXEND.request 20.5.5.5.1 Function 20.5.5.5.2 Semantics of the service primitive 20.5.5.5.3 When generated 20.5.5.5.4 Effect of receipt 20.5.5.6 PMD_TXEND.confirm 20.5.5.6.1 Function 20.5.5.6.2 Semantics of the service primitive 20.5.5.6.3 When generated 20.5.5.6.4 Effect of receipt
376	20.5.5.7 PMD_TXPWRLVL.request 20.5.5.7.1 Function 20.5.5.7.2 Semantics of the service primitive 20.5.5.7.3 When generated 20.5.5.7.4 Effect of receipt 20.5.5.8 PMD_RSSI.indication 20.5.5.8.1 Function 20.5.5.8.2 Semantics of the service primitive 20.5.5.8.3 When generated 20.5.5.8.4 Effect of receipt 20.5.5.9 PMD_RCPI.indication 20.5.5.9.1 Function
377	20.5.5.9.2 Semantics of the service primitive 20.5.5.9.3 When generated 20.5.5.9.4 Effect of receipt 20.5.5.10 PMD_TX_PARAMETERS.request 20.5.5.10.1 Function 20.5.5.10.2 Semantics of the service primitive 20.5.5.10.3 When generated 20.5.5.10.4 Effect of receipt 20.5.5.11 PMD_CBW_OFFSET.indication 20.5.5.11.1 Function 20.5.5.11.2 Semantics of the service primitive
378	20.5.5.11.3 When generated 20.5.5.11.4 Effect of receipt 20.5.5.12 PMD_CHAN_MAT.indication 20.5.5.12.1 Function 20.5.5.12.2 Semantics of the service primitive 20.5.5.12.3 When generated 20.5.5.12.4 Effect of receipt 20.5.5.13 PMD_FORMAT.indication 20.5.5.13.1 Function 20.5.5.13.2 Semantics of the service primitive 20.5.5.13.3 When generated
379	20.5.5.13.4 Effect of receipt 20.6 Parameters for HT MCSs
389	Annex A (normative) Protocol Implementation Conformance Statement (PICS) proforma
400	Annex C (informative) Formal description of a subset of MAC operation
401	Annex D (normative) ASN.1 encoding of the MAC and PHY MIB
447	Annex G (informative) Examples of encoding a frame for OFDM PHYs
488	Annex I (normative) Regulatory classes
489	Annex J (normative) Country information element and regulatory classes
492	Annex P (informative) Bibliography
493	Annex Q (normative) ASN.1 encoding of the RRM MIB
514	Annex R (normative) HT LDPC matrix definitions
517	Annex S (informative) Frame exchange sequences
530	Annex T (informative)

Additional information

Standard Title	IEEE Standard for Information technology– Local and metropolitan area networks– Specific requirements– Part 11: Wireless LAN Medium Access Control (MAC)and Physical Layer (PHY) Specifications Amendment 5: Enhancements for Higher Throughput
Published Code	IEEE
Publication Date	2009
Pages Count	536

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