摘要
给出了一种利用正交空时分组码（OSTBC）构造正交空时（OST）矩阵的新方法，并验证了不同的OST矩阵相乘结果仍为OST矩阵这一结论．在此基础上，提出一种新的多用户多输入多输出（MIMO）上行传输系统检测方案．首先利用用户等效OST信道特性对接收信号进行等效信道变换，然后通过连续用户干扰抵消实现各用户发送数据的分离．仿真结果表明，当误码率为1×10^-3时，本文算法较CZF算法和MMSE-ML算法有2～3dB的信噪比增益，同时具有更低的译码复杂度．
A new method to construct orthogonal space-time（OST） matrix based on the orthogonal space-time block code（OSTBC） was presented. It is verified that the multiplication of different OST matrix is still an OST matrix was also verified. A novel decoding algorithm for uplink transmission system was proposed. By means of the characteristic of equivalent OSTBC channel, the base station performed the equivalent channel transformation to the received signal, and then the successive user interference cancellation strategy was adopted to separate the transmitted data of each user. Simulation results showed the proposed method can obtain a signal to noise ratio （SNR） gain of approximately 2-3 dB when compared with the CZF algorithm and the MMSE-ML algorithm, but with a much lower decoding complexity.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第9期12-15,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金项目(60702060
60572148)
高等学校学科创新引智计划资助项目(B08038)
国家重点实验室专项基金资助项目(ISN03080005)
关键词
多用户检测
等效信道
干扰抵消
空时分组码
多输入多输出
multiuser detection
equivalent channel
interference cancellation
space time block code
MIMO（multiple-input multiple-output）
