摘要
本文介绍了时跳脉冲位置调制(THPPM)超宽带信号形式的信号结构,并分析了高斯脉冲波形及其自相关函数的时域特性.给出了一个阵列天线模型,定义并仿真计算了阵列天线的峰值幅度方向图,结果表明,阵元数目越多,阵列波束宽度越窄;同时,提出了二分搜索波束形成算法并进行了仿真,仿真结果表明,该波束形成算法收敛速度快,收敛步数在1～15步之间,能实时调整阵列的主波束方向对准来波的方位,得到信号的最佳接收.
This paper describes the configuration of a typical time-hopping, pulse position modulated (TH-PPM) signal for ultrawide-band (UWB) systems and the time-domain properties of the Gaussian pulse and its autocorrelation function are derived. An antenna array model for UWB communication systems is introduced and the peak-amplitude pattern is defined and simulated. Simulative results indicate that the beam width grows narrower when the array number gets large. It also provides a rapid bi-searching beamforming algorithm. Simulations show that the convergent steps of the algorithm are between one and fifteen. The algorithm could electronically steer the beam axis to the direction of the source signal and the optimum signal reception is achieved.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第6期1081-1083,共3页
Acta Electronica Sinica
关键词
波束形成算法
阵列天线
方向图
自相关函数
Algorithms
Communication systems
Computer simulation
Convergence of numerical methods
Directional patterns (antenna)
Gaussian noise (electronic)
Mathematical models
Optimization
Pulse position modulation
Signal processing
Time domain analysis
