一种突发模式DSSS信号频差估计算法及FPGA实现

Frequency Estimation Algorithm of the DSSS Burst-Mode Communication and Its Implementation Based on FPGA

基于无线突发模式自组网(Ad-hoc)通信系统,分析了一种频差估计算法(Simplified Fre-quency Estimator,SFE),并对SFE算法改进以适于该系统频差校正。Matlab仿真表明:算法改进后,在相同信噪比下具有较大的频差估计范围;在低信噪比下,均方误差性能好于原算法。最后给出了该算法的FPGA流水线实现方案,且在实际系统中通过了测试。

A Simplified Frequency Estimator arithmetic is analyzed and improved for a wireless burst mode ad-hoc transmission system. The matlab simulation result shows that： the Improved SFE algorithm yields a wider estimation range at the same SNR, and a better MSE performance at the low SNR. Finally, the pineline SFE algorithm is implemented and tested in real communication systems.