Generalized Syndrome Decoding of High-Rate Turbo Codes for Reliable Adaptive Modulation

T. Minowa (Japan)


Adaptive modulation, rate-compatibility, turbo codes.


Adaptive modulation is a scheme for adapting the modula tion type of a transmitter to the condition of time-varying channels. A key component of the adaptive modulation is a rate-compatible coding scheme, by which the transmitter can adapt its coding rate to modulation type given accord ing to the channel. We present a new rate-compatible cod ing scheme for high-rate turbo codes that uses an originally high-rate convolutional code. The rate-compatibility is ac complished by repetition coding that generates a variety of low-rate codes from a high-rate code by repeating part of information bits of the original high-rate code.

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