Queuing Analysis for Multiple-Antenna Cognitive Radio Wireless Networks With Beamforming
IEEE Signal Processing Letters2017Vol. 24(3), pp. 334–338
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Abstract
This letter presents an analysis of the queuing performance of a multiple-antenna cognitive radio system employing downlink beamforming. The paradigm of multiantenna zero-forcing beamforming is employed to null the interference at the primary users. A closed-form expression is derived for the probability density of successful packet transmission time followed by results for the average waiting and transmission times in an M/G/1 secondary user queuing system. Furthermore, this framework and the results are also extended to scenarios with ARQ and partial channel state information at the secondary transmitter. Numerical simulation results are presented to validate the theoretical performance analysis.
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