2-LEVEL CODING BASED ON TRELLIS-CODED MODULATION AND REED-SOLOMON CODES

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作者
WEI, LF
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TM [电工技术]; TN [电子技术、通信技术];
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0808 ; 0809 ;
摘要
A number of two-level codes based on trellis-coded modulation (TCM) schemes and their matched single or double error-correcting Reed-Solomon codes using QAM constellations are presented and evaluated. Compared to the well-known 4-D 16-state TCM scheme with a comparable bandwidth efficiency, these two-level codes provide greater immunity from both Gaussian and impulse noise, at the cost of a reasonably higher complexity and a longer decoding delay, on the order of a few hundred symbols. We also show how to cope with phase ambiguities of the constellation in these two-level codes. Both rotationally invariant coding and rotation detecting techniques are considered.
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页码:3098 / 3108
页数:11
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