TIA-902.BBAD:2003 (R2013)

$46.80

Wideband Air Interface – Isotropic Orthogonal Transform Algorithm (IOTA) Radio Channel Coding (CHC) Specification-Public Safety Wideband Data Standards Project – Digital Radio Technical Standards

Published By	Publication Date	Number of Pages
TIA	2003	96

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Category: TIA

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Description

Radio channel coding is a function in the wide band air
interface between the MAC/RLA sublayer and the modulation in the
physical layer. Radio channel coding is present in all radios in a
system with a wide band air interface.

The radio channel coding functions are used to maximize data
throughput and minimize delay through the error-prone Wideband Air
Interface (WAI). Figure 2 shows the reference configuration of a
WAI transmitter, and Figure 3 shows the reference configuration of
a WAI receiver. Wideband Air Interface is defined for Isotropic
Orthogonal Transform Algorithm (IOTA) in reference [1]. Diagrams of
figure 2 and 3 show the major processing blocks between the radio
channel coding and physical layers. These processing blocks exist
for all WAI configuration modes (SAM and IOTA) and, except for
scrambling, they are described here in the case of IOTA. The
scrambler and forward error correction (FEC) coding functions
blocks operate at the bit level while the interleaver and modulator
operate at the symbol level.

The functions and procedures for radio channel coding include
scrambling which is defined and described in the MAC/RLA Layer
Specification given in reference [2]. The other functions of
forward error correction, interleaving, and mapping to physical
layer modulation symbols are defined in the following sections in
the case of IOTA.

Additional information