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在流星突发通信中,为确保数据有效可靠地传输,通常采用前向纠错与自动重传请求相结合的方法,即HARQ。传统I型HARQ效率较低,难以满足大数据量通信。为了有效利用流星信道,建立了流星突发通信模型,提出了一种基于分集合并的Ⅰ型HARQ方案,推导出了有效信噪比公式,讨论了信噪比改善系数和最大重传次数,并进行了仿真。仿真结果表明,该方案可有效提高可靠性,增加吞吐量。
In meteor burst communication, in order to ensure the effective and reliable data transmission, it usually adopts a combination of forward error correction and automatic retransmission request, that is, HARQ. The traditional I-type HARQ has lower efficiency and is difficult to meet the large amount of data communication. In order to make effective use of meteor channel, a meteor burst communication model is established and a Type I HARQ scheme based on diversity combining is proposed. An effective SNR formula is deduced, and the SNR improvement coefficient and the maximum number of retransmissions are discussed. Have carried on the simulation. The simulation results show that this scheme can effectively improve the reliability and increase the throughput.