Given the sampled data of each element, the signal processing of AAA consists of three parts: the determination of source number, the DOA (Direction of Arrival) multi-user detection and DBF (Digital Beamforming).
在给定各阵元的取样数据后,自适应阵列天线信号处理的问题一般可以归结到三个方面:信号源数目的确定、波达方向(DOA: Direction of Arrival)的多用户检测和数字波束形成(DBF: Digital Beamforming)。
Then we analysis and compare channel characteristics in time-domain,frequency-domain and spatial-domain followed by discussions on two schemes for transmitting digital multiple-beam,with highlight on digital beam-forming(DBF).
Firstly, signal simulation models were established for PCM/FM systems. Secondly, a hybrid digital beam-forming scheme based on RLS-CMA and MLMS-CMA was developed. Finally, simulation analysis was made for a uniform linear array with four elements.
A method of digital beam formation of smart antenna system is introduced. By the method,FPGA is utilized for conducting the spatial filter,weight estimation is realized through the float point calculation of DSP,thus preventing High order addition carry from lowering the calculation speed.