If SDMA is used on the downlink of a multi-user MIMO system, either long-term or short-term channel state information has to be available at the base station (BS) to faciliate the joint precoding of the signals intended for the different users.

matlab 波束形成的仿真，包含时域，频域，相移波束形成(Matlab beamforming simulation, including time domain, frequency domain, phase-shifted beamforming)

用自适应方法设计具有特定频率响应的FIR滤波器用于进行时域宽带波束形成(Adaptive design of FIR filter with specific frequency response for time domain broadband beamforming)