扩频通信芯片STEL-2000A的初步改进及其FPGA实现  

The Initial Improvements and FPGA Realization of the Spread-Spectrum Communication Chip STEL-2000A

作　　者：徐艳梅[1] 万毅[1] 

机构地区：[1]兰州大学信息科学与工程学院,兰州730000

出　　处：《软件》2011年第3期109-112,共4页Software

摘　　要：本文对扩频通信芯片STEL-2000A的主要功能模块进行了研究,针对匹配滤波器和差分解调模块进行改进。具体来说,对匹配滤波器模块的幅值近似公式进行了详细误差分析,提出更加精确的近似公式。此外,针对差分解调模块提出新的查找表方法,相比原有的解调方法,新方法不仅正确实现差分解调功能,而且简化了复杂度、减小了计算量及资源占用量。改进的系统在Virtex-IIpro开发板上进行实现,验证了改进方法的正确性及有效性。In this paper,main function modules of spread spectrum comminucation chip STEL-2000A are studied and some improvements are made for the matched filter module and the differential demodulation module.Specifically,the detailed error analysis of the amplitude approximate formula is given in the matched filter module and more accurate approximate formulas are proposed.In addition,a new look-up table method is presented for the differential demodulation module.Compared with the original method,the new method not only achieves the correct differential demodulation function but also simplifies the complexity and reduces the amount of computation and the resource consumption.The improved system is realized on the Virtex-II pro development board which verifies the correctness and the validity of the improved method.

关 键 词：扩频通信 DS-CDMA STEL-2000A FPGA 匹配滤波器 差分解调 查找表 

分 类 号：TN914.42[电子电信—通信与信息系统]