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预编码技术能够有效的抑制MIMO信道中的多用户干扰,能显著提高系统容量,同时也能大大简化接收机的算法。主要对MIMO-OFDM系统的非线性预编码技术进行了深入研究,通过搭建出的MIMO-OFDM仿真平台对DPC(Dirty Paper Coding,脏纸编码)和THP(Tomlinson Harashima Precoding,模代数TH编码)两种非线性预编码算法进行了性能仿真,比较了这两种算法的BER(误码率),同时也比较了它们与线性ZF(Zero Forcing,迫零)预编码算法的BER差异,并指出了不同算法的适用性。
Precoding technology can effectively suppress multi-user interference in MIMO channel, can significantly improve system capacity, but also can greatly simplify the receiver algorithm. The main contributions of this dissertation are as follows: (1) Non-linear precoding techniques for MIMO-OFDM systems are studied in detail. Dirty Paper Coding (DPC) and THP (TH alphanumerical coding) The performance of the non-linear precoding algorithm was simulated and the BER (bit error rate) of the two algorithms was compared. The BER differences between them and the linear ZF (zero forcing) precoding algorithm were also compared. The applicability of different algorithms.