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在LTE-Advanced(LTE-A)系统中,针对目前多用户协作多点传输中常用的预编码算法不能在消除用户间的干扰和自身天线之间干扰的同时考虑系统噪声影响这一现象,提出两种优化的算法:一种是将BD算法与MMSE算法结合;另一种是在SLNR算法的基础上再次利用ZF算法。这两种优化算法都是在消除所有干扰的基础上同时考虑噪声影响的一种方案,仿真结果表明,这两种优化算法可以有效的降低系统误码率,提供了系统性能。
In the LTE-Advanced (LTE-A) system, precoding algorithms commonly used in multi-user coordinated multi-point transmission currently can not eliminate the interference between users and interference between antennas and consider the influence of system noise. Two kinds of optimized algorithms: One is to combine BD algorithm with MMSE algorithm; the other is to use ZF algorithm again based on SLNR algorithm. Both of these optimization algorithms are a solution to consider the influence of noise on the basis of eliminating all the interference. The simulation results show that these two optimization algorithms can effectively reduce the system BER and provide system performance.