TD-SCDMA基于HSUPA技术的追踪合并HARQ应用研究

Research on the Application of Chase Combining HARQ Based on HSUPA Technology in TD-SCDMA

TD-SCDMA采用高速上行分组接入技术是为了显著提高上行分组数据的传输速率,同时减少传输延迟。其中采用的混合自动重传技术可以提高译码的成功率,使数据传输更加可靠。阐述了混合自动重传技术的原理,提出了一种在高速上行分组接入中将追踪合并算法应用于混合自动重传技术的方案,并在专有信道模型条件下对不同参数的上行链路性能进行了仿真,结果表明,该方案对于提高上行链路的吞吐量和降低误块率具有较好的作用。

High Speed Uplink Packet Access（HSUPA） is used to improve uplink packet data transfer rate,and to reduce latency in TD-SCDMA.Hybrid Automatic Repeat Request（HARQ） used in HSUPA can enlarge the success rate of the decoder and increase the reliability during the transfer service.The theory of HARQ in TD-SCDMA system are elaborated,a proposal which applied chase combining to HARQ is raised in HSUPA.Under the condition of proper channel model,the uplink performance with different control parameters has been simulated.It is found out that the proposal can increase the system throughput and decrease the BLER effectively and feasibly.