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。%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.
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