CAJ | 학술논문

为了在不降低频带利用率和功率利用率的情况下以设备的复杂化来换取编码增益，提出了一种将编码和调制方式结合在一起的比特交织编码调制（Bit Interleaved Coded Modulation，BICM）技术。该技术针对网格编码调制（Trellis Coded Modulation，TCM）灵活性差和衰落信道中性能差的缺点，在理想交织时将编码器和调制器分离设计，具有高度的灵活性，并可以得到近似网格编码调制的性能，并且对衰落信道具有很好的鲁棒性。介绍了比特交织编码调制的构成模式、关键技术，包括信道编码、比特交织和调制，给出了BCIM理论分析，并对不同的交织深度、交织方法和高阶调制等进行了性能仿真分析。仿真结果表明比特交织编码调制可以取得良好的误码率性能。
위료재불강저빈대이용솔화공솔이용솔적정황하이설비적복잡화래환취편마증익，제출료일충장편마화조제방식결합재일기적비특교직편마조제（Bit Interleaved Coded Modulation，BICM）기술。해기술침대망격편마조제（Trellis Coded Modulation，TCM）령활성차화쇠락신도중성능차적결점，재이상교직시장편마기화조제기분리설계，구유고도적령활성，병가이득도근사망격편마조제적성능，병차대쇠락신도구유흔호적로봉성。개소료비특교직편마조제적구성모식、관건기술，포괄신도편마、비특교직화조제，급출료BCIM이론분석，병대불동적교직심도、교직방법화고계조제등진행료성능방진분석。방진결과표명비특교직편마조제가이취득량호적오마솔성능。
In order to improve the coding gain without reducing spectrum efficiency and power efficiency, Bit Interleaved Coded Modulation （BICM） which combines coding and modulation has been proposed. Considering the low flexibility and bad performance of Trellis Coded Modulation （TCM） in fading channel,coder and modulator are designed separatedly in BICM when bit interleaved is perfect,achieving high flexibility,performance approximate to that of TCM, and robustness in fading channel. The architecture of BICM and the key techniques, including charmel coding, bit interleaving and modulation, have been introduced. Tne theoretical analysis on BICM has been presented. The interleaving depth, interleaving methods and high-order modulation have been simulated. Simulation results show that BICM has good BER performance.