Abstract
A class of turbo product codes is investigated for applications to slow-frequency-hop spread-spectrum communications over channels with partial-band interference and thermal noise. The partial-band interference is modeled as band-limited white noise, and decoders with and without side information are examined. The primary results are for noncoherent demodulation of binary orthogonal signals, but results are also presented for coherent demodulation of antipodal signals. Comparisons with previous results for other turbo codes are presented. It is shown that, in some situations, a system with a commercial off-the-shelf turbo product code achieves performance that is better than previously published results for parallel-concatenated turbo codes of approximately the same rate. It is also shown that the performance of the commercial decoder can be enhanced by the use of side information that is developed in the demodulator.
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