Effective capacity describes the rate upper bound of the communication system under the quality of service(QoS)limitation.While the foregoing performance analysis focuses mainly on the single input single output and multiple input single output systems,this paper considers the effective capacity of the multiple input multiple output(MIMO)beamforming scheme.Given that the modulation(M-QAM or MPSK)is restricted,we investigate the representative transmission scheme of MIMO beamforming:maximal ratio combining t...