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为了克服多用户下行MIMO系统采用迫零波束成形算法时基站天线的数目要大于等于所有同时工作的用户接收天线的数目之和的缺点,文中提出了一种改进的多用户下行MIMO系统用户选择算法。该算法具有较低的算法复杂度,性能优于常规的基于贪婪算法的用户选择方法。
In order to overcome the shortcomings that the number of base station antennas is greater than or equal to the sum of the number of receiving antennas of all users working concurrently when a zero-forcing beamforming algorithm is adopted in a multi-user downlink MIMO system, an improved user selection algorithm for a multi-user downlink MIMO system is proposed . This algorithm has a lower complexity of the algorithm and has better performance than the conventional greed-based user selection method.