基于Zynq-7000的宽带自适应噪声抵消系统设计  

Design of Broadband Adaptive Noise Cancellation System Based on Zynq-7000

作　　者：何宗苗 窦源[1] 郑风[1] 

机构地区：[1]西南科技大学信息工程学院特殊环境机器人技术四川省重点实验室,四川绵阳621010

出　　处：《电视技术》2015年第1期47-50,共4页Video Engineering

基　　金：国防基础科研计划项目(B3120133002);西南科技大学研究生创新基金项目(14ycx115)

摘　　要：由于干扰噪声常常是随机变化和非平稳的,传统的滤波方法很难消除。针对这一问题,选用自适应格型联合算法(GAL-NLMS)。在Zynq-7000芯片PL部分实现了一个22阶的GAL-NLMS算法,在芯片的PS部分实现了驱动程序的设计和基于Qt的界面设计。处理速度达到175 Mbit/s,并在Zed Board开发平台实现了宽带自适应噪声抵消系统。用被噪声干扰过的QPSK和16QAM调制信号对系统进行测试,结果表明系统有效。Because of the interference noise is often random and non-stationary, the traditional filtering method is difficult to remove it. To solve this problem, an algorithm of joint adaptive lattice （GAL-NLMS） is adopted in this paper. A 22 order GAL- NLMS algorithm is achieved in the PL part of Zynq-7000 chip, and a design of driver and interface design based on Qt are achieved in the PS part of the chip. The processing speed can reach 175 Mbit/s, and broadband adaptive noise cancellation system is realized in ZedBoard which is a development platform. The system is tested using QPSK and 16QAM modulated signals and the results show that the system is effective.

关 键 词：非平稳 自适应 GAL—LMS ZedBoard 噪声抵消 

分 类 号：TN911.7[电子电信—通信与信息系统]