The method does not need precoding or constant-modulus (CM) modulating.
该算法无需预编码或恒模调制。
The thesis mainly discusses the precoding techniques applied in the MIMO downlink of LTE system.
本文主要对lte中MIMO下行链路的预编码以及相关技术进行了研究。
Since the CSIT plays a key role in the precoding scheme, the CSIT acquisition model is studied firstly.
由于发射端获得的信道信息对预编码系统的性能有重要影响，因此，本文首先研究了动态CSIT模型。
In practical systems, limited feedback precoding based on codebook is used, due to the limited capacity of the feedback channel.
在实际系统中，由于反馈信道容量有限，采用的是基于码本的有限反馈预编码技术。
Joint precoding and post-equalization is effective for combating the dispersive effects of channels in block transmission systems.
在块传输系统中，采用预编码-后均衡相结合的联合均衡技术能够有效克服信道的色散效应。
Precoding technology can improve the performance of MIMO system, by adjusting the transmit single according to the channel condition.
预编码是一种根据信道情况对发射信号进行预处理，从而提高MIMO系统性能的技术。
Then, we study the precoding for space multiplexing MIMO-OFDM systems. Here, we propose an interpolation-based vector quantization precoding scheme.
然后，研究了空间复用MIMO - OFDM系统的预编码，提出了一种基于插值的矢量量化预编码方案。
Error propagation caused by noise can be avoided by precoding the data at the transmitter prior to modulation and decoding operation of received signals.
在调制信号前采用数据预编码，对接收信号进行相应译码，以消除信道中噪声引起的差错传播。
On the one hand, this precoding mechanism guarantees the receiver get full-diversity detection performance, which will definitely improve the reliability of transmission;
该算法一方面可以使得接收端线性检测获得满分集，提高传输的可靠性；
In MIMO spatial multiplexing system, channel state information(CSI) is very useful for adaptive selection of the optimal precoding schemes which can enhance system performance effectively.
针对MIMO空分复用系统中利用信道状态信息自适应选择最佳预编码方案能有效提高系统性能，提出了一种基于有限比特反馈的预编码联合优化算法。
Based on the dynamic CSIT model, varies of robust precoding schemes are studied in this dissertation, including robust linear ZF precoding, robust linear MMSE precoding and robust THP precoding.
基于动态CSIT获得的部分信道信息，本文深入研究了不同的预编码机制，包括线性迫零预编码、线性MMSE预编码和非线性THP预编码。
Based on the dynamic CSIT model, varies of robust precoding schemes are studied in this dissertation, including robust linear ZF precoding, robust linear MMSE precoding and robust THP precoding.
基于动态CSIT获得的部分信道信息，本文深入研究了不同的预编码机制，包括线性迫零预编码、线性MMSE预编码和非线性THP预编码。
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