快变信道OFDM均衡器的FPGA设计

FPGA Implementation of Equalizers for OFDM Systems over Time-Varying Channels

对快变信道OFDM均衡算法进行了分析,对算法的FPGA实现进行了设计,包括如何降低计算复杂度和提高系统资源利用率等.与常用的由一个状态机控制实现全部运算的方法不同,该设计将复杂的均衡处理分解为多个功能较为简单的模块,并通过控制器控制模块间的协调合作,提高运算速度.每个运算模块均还拥有自己独立的计算器,以达到减少冲突、设计方便和节约逻辑资源的目的.分析与测试结果表明:该设计具有占用资源少和运行速度快的优点.

An equalization algorithms for OFDM systems over time-varying channels and their FPGA implementations are investigated.Different from conventionally used implementation methods controlled by a state machine,the proposed implementations divide the complex equalization processing into many relatively simple modules to speed up the computation speed.Each module has its own computation unit,which avoids conflict,makes the design more convenient,and conserves the resources.Analysis and test results show that the proposed FPGA-based equalizer has the advantages of conserving resources and high processing speed.