一种基于复相关的位同步算法的研究和实现

Research and Realization on Bit Synchronous Algorithm Based on Complex Correlation

在无线通信中,信号接收端位同步输出的最佳采样点位置对整个接收机的性能有比较大的影响。针对该问题,本文提出了一种基于复相关的位同步算法,通过将复相关结果累加,利用接收信号进行归一化,在获得最佳采样点位置的同时,为后续信噪比估计模块提供相关计算参数,简化了算法和节省了硬件FPGA资源。最后在VIVADO开发软件中进行仿真验证和实际测试,测试结果表明该算法实现的位同步性能指标比较高,在整个解调算法中具有重要的作用。

In the wireless communication, the best sampling point location of signal receiver bit synchronization output has the big influence to the function of whole receivers. Aiming at this problem, this paper put forward a bit synchronous algorithm based on the complex correlation, according to add the result of complex correlation and make use of the receiving signal to normalize, and then provide the related calculation parameter for the follow-up at the same time of acquiring the best sampling point location, and simplify the algorithm and save the hardware FPGA resources. Finally, the simulation and actual experiment are finished in VIVADO development software, the result shows that the performance index of bit synchronization which realized by this algorithm is higher and play an important role in the whole demodulation algorithm.