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arXiv 0905.0606cs.ITmath.IT
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用于比特交织编码调制系统中软输出解调器的Quantization

Quantization for Soft-Output Demodulators in Bit-Interleaved Coded Modulation Systems

Clemens Novak, Peter Fertl, Gerald Matz

摘要:

研究了比特交织编码调制(BICM)系统中对数似然比(LLR)的量化问题。我们建议设计的量化器,使量化器的输出成为等概率。我们调查半解析和数值上的遍历和中断容量在单天线和多天线信道不同的量化器。最后,我们展示了比特出错率模拟BICM系统的LLR量化使用率1/2低密度奇偶校验码。

英文摘要:

We study quantization of log-likelihood ratios (LLR) in bit-interleaved coded modulation (BICM) systems in terms of an equivalent discrete channel. We propose to design the quantizer such that the quantizer outputs become equiprobable. We investigate semi-analytically and numerically the ergodic and outage capacity over single- and multiple-antenna channels for different quantizers. Finally, we show bit error rate simulations for BICM systems with LLR quantization using a rate 1/2 low-density parity-check code.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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