摘要
卫星导航信号具有发射功率弱、信号载波和码元易丢失等特点,很容易受到强信号的压制式干扰。采用自适应天线阵列对导航信号进行抗干扰处理,设计使用适合导航信号的功率倒置算法来实现抗干扰。提出了一种基于CORDIC算法的无乘法器结构的DLMS算法设计,CORDIC算法引入的流水线延迟适用于空时二维DLMS算法,延迟不会影响空时二维DLMS算法的收敛特性及估计误差。详细介绍了CORDIC乘法单元的设计、空时二维DLMS的相关参数的设计,在Simulink上完成了系统的仿真,最后给出了仿真结果,验证了设计的正确性和可行性。
Satellite navigation signals have the characteristics of weak transmitted power and easy lost of signal carrier and symbol, etc., which are susceptible to jamming of strong signals. In this paper, an adaptive antenna array is designed for processing for naviga- tion signal anti-interference, the design uses power inversion algorithm which is very suitable for navigation signals to achieve anti- interference. A DLMS algorithm structure without multiplier is proposed which is based on CORDIC algorithm, the pipeline delays from the CORDIC algorithm are suitable for using in the two-dimensional space-time DLMS algorithm, and the delays will not af- fect the convergence properties of space-time DLMS algorithm and estimation errors. This paper introduces the design parameters of the two-dimensional space-time DLMS and the design of multiplication unit based on CORDIC in detail, and the simulation of system is finished in simulink. The simulation results are given to verify the correctness and feasibility of the design at last.
出处
《电子技术应用》
北大核心
2015年第1期104-106,110,共4页
Application of Electronic Technique
