基于序列自相关的信道估计与均衡算法FPGA实现*

针对传统的单载波频域均衡算法存在的受信道随机噪声影响较大的缺点,利用序列自相关性进行信道估计,有效解决了随机噪声对信道均衡的影响问题,并结合工程实际,在该信道估计算法的基础上,对频域均衡的实现进行了适应性改进。选用Altera公司的EP3C120F484芯片实现了该算法,设计了频域均衡系统的FPGA实现方案。经验证,该算法能同时适应多径和噪声干扰严重的复杂信道。

The FPGA realization of channel estimation and equalization algorithm based on self-correlation of sequence

In view of the shortcomings that the traditional single carrier frequency domain equalization algorithm is easily affected by channel random noisy, using the self-correlation of sequence to estimate the channel has effectively solve the problem of random noisy on channel equalization. Considering the engineering practice, on the basis of the channel estimation algorithm mentioned above, some adaptive improvement has been placed to the realization of frequency domain equalization, and the EP3C120F484 from Altera has been chosen as the FPGA platform to achieve the algorithm. Besides, the application scheme on FPGA has been designed. It has been proved by practical test that the algorithm can adapt to the complicated channel which is interference seriously by multipath propagation and noisy.