【摘要】 为了提高通信系统的传输量以及可靠性,高速可靠的数据传输系统经常采用自动重传请求与前向纠错相结合的混合ARQ方案.根据传统的混合ARQ方案的不足,提出了一种基于信道噪声估计的混合ARQ方案,分析了系统的数据交换量、平均传送时间.最后通过实验仿真说明了本方案可以获得较大的数据交换量,减小平均传送时间,提高系统的传输可靠性.更多还原

【Abstract】 Hybrid automatic repeat request(HARQ) protocol using auto repeat request and front error control is always used for reliable high rate services for the purpose to improve the throughput and reliability of communication systems.According to analyzing the disadvantage of the traditional ARQ scheme,a new type HARQ scheme based on channel noise estimation is presented.The throughput and average transmission time are analyzed.Simulation results show that the proposed scheme achieves higher throughput,reduces the average transmission time and improves the reliability of the system.更多还原