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在多用户正交频分复用(OFDM)系统中,提出了一种基于复合星座的自适应子载波和比特分配方案。在保证各个用户速率和误码率要求的前提下,提出基于复合星座的多用户灌水算法。该算法消除了许多研究中每个子载波只能被一个用户占用的限制,以较小的计算复杂度获得了较高的性能。
In multi-user orthogonal frequency division multiplexing (OFDM) system, an adaptive subcarrier and bit allocation scheme based on composite constellation is proposed. Under the premise of ensuring the rate and error rate of each user, a multi-user irrigation algorithm based on composite constellation is proposed. The algorithm eliminates the limitation that each sub-carrier can only be occupied by one user in many studies, and achieves higher performance with less computational complexity.