直扩系统中匹配滤波器的FPGA实现及优化设计

Implementation and optimization designing of digital matched filter by using FPGA in DS spread spectrum systems

数字匹配滤波器也称作数字相关器,文章介绍了数字匹配滤波器在FPGA上的实现方式,对于卫星通信等领域中要求的匹配长度较长而导致的器件消耗增大,讨论了资源优化的途径,并对比2种优化方式,给出了经改进后的逻辑复用的FIR结构;综合结果表明,该结构能有效地节省器件的消耗。

The implementation of the digital matched filter（DMF） by using the field programmable gate array（FPGA） is introduced. Methods for optimizing resource consumption caused by the increase in correlation length in satellite communication fields are discussed and an improved multiplexing FIR structure is proposed. The simulation result shows that this structure is effective in reducing resource occupation.