LTE系统中高阶调制软解调算法研究
Research in Soft Demodulation Algorithms of High Order Modulation in LTE System
LTE 系统具有频谱效率高、可靠性强的优点。为了现实这些优点，系统采用了Turbo码和高阶调制相结合的方法，接收端的译码输入为比特级的软信息，所以解调需要采用软解调的方法。目前比较成熟的软解调算法有log_MAP和max_log_MAP。本文在max_log_MAP算法基础之上对算法进行了改进，使计算复杂度更低，同时提出了一种算法复杂度更低的软解调算法，该算法和Turbo译码的组合可在减少硬件复杂性的同时保持最佳性能。
In LTE system, combination of Turbo code and high order modulation can achieve higher bandwidth efficiency. Since bit level soft input information is necessary for Turbo decoder, the demodulator has to provide bit level soft information to it. The log_MAP and max_log_AMP are commonly used soft demodulating-algrithms. A new algrithm with less computational complexity is investigated on basic of max_log_MAP. In addition, another algrithm which can heavily reduce computational complexity is also investigated.
邹勇、吴湛击、王文博
无线通信通信
LTE高阶软解调计算复杂度
LTEhigh order demodulationcomputational complexity
邹勇,吴湛击,王文博.LTE系统中高阶调制软解调算法研究[EB/OL].(2011-09-29)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/201109-385.点此复制
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