CAJ | 학술논문

如何更加可靠、有效地传输数据，是通信系统一个永恒不变的话题。 HARQ作为结合了信道编码的自动重传机制，能够在最大限度下减小误码率，提高吞吐率。提出了新型多信道停等重传模型，采用了IEEE 802.16e标准中的LDPC码，使用了改进后的Chase合并机制，分别对常规的单信道和新型多信道停等HARQ系统在cost-207中RA衰落信道下进行了系统级性能仿真。结果表明，以IEEE 802.16e标准的LDPC码作为HARQ的前向纠错编码并辅以合适的码合并机制，系统具有极好的纠检错性能。在引入提出的新型多信道传输方案后，系统的吞吐率及整体效率得到显著提升。
여하경가가고、유효지전수수거，시통신계통일개영항불변적화제。 HARQ작위결합료신도편마적자동중전궤제，능구재최대한도하감소오마솔，제고탄토솔。제출료신형다신도정등중전모형，채용료IEEE 802.16e표준중적LDPC마，사용료개진후적Chase합병궤제，분별대상규적단신도화신형다신도정등HARQ계통재cost-207중RA쇠락신도하진행료계통급성능방진。결과표명，이IEEE 802.16e표준적LDPC마작위HARQ적전향규착편마병보이합괄적마합병궤제，계통구유겁호적규검착성능。재인입제출적신형다신도전수방안후，계통적탄토솔급정체효솔득도현저제승。
How to transmit data more reliably and more effectively is always a hot research topic. HARQ, as an automatic repeat mechanism in combination of channel coding,can reduce bit error rate and improve throughput in a maximum degree. A new-type multi-channel stop-and-wait retransmission model is pro-posed which adopts LDPC codes in IEEE 802 . 16 e criterion to conduct a series of system level simulation on both conventional single channel and new-type multi-channel HARQ system in an improved Chase combining mechanisms under RA fading channel in cost-207 , thus comparing and evaluating their per-formances. The results show that by using LDPC codes in IEEE 802. 16e criterion as forward error code in HARQ system and assisted by proper code combining mechanism, an excellent error detection and correc-tion performance could be achieved. By introducing the new-type multi-channel transmission scheme, the throughput and entire efficiency of the system could be significantly improved.