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线性分散码与空间复用组合系统检测算法研究
Study of detection algorithm for linear-dispersion code and spatial multiplexing combined system
【摘要】 在空间上组合空时编码与空间复用技术可以使MIMO通信系统同时获得分集和空间复用增益.为了适合高速传输业务需求,提出线性分散码与空间复用组合系统.针对线性分散码与空间复用组合系统码块的线性结构特点,为了既能保证解码的有效又可以减小检测算法的运算成本,提出定步长改进球形检测算法.基于Matlab平台进行仿真试验,通过与空时正交分组码与空间复用组合系统的性能比较,证明在高频谱利用率的情况下,线性分散码与空间复用组合系统的性能更好,即更适合高速传输业务的需求;在检测算法方面,定步长改进球形检测算法虽然比球形解码算法损失了约1dB的性能,但是运算成本仅为球形算法的30%.
【Abstract】 Space-time block code is combined with a spatial multiplexing technique in a multiple-input multiple-output(MIMO) system to simultaneously obtain diversity gain and spatial multiplexing gain.In order to adapt for a high-rate transmission operation,a linear-dispersion code and spatial multiplexing combined system was proposed.Compared with a space-time orthogonal code and spatial multiplexing combined system,the performance and high spectral efficiency of this system was better.In addition,simulation results show the constant-step modified sphere detection algorithm decreases the performance about 1 dB from the sphere decoding algorithm,but the calculation cost of the constant-step modified sphere detection algorithm is only 30 percent of that of the sphere decoding algorithm.
【Key words】 linear-dispersion code; space-time orthogonal code; spatial multiplexing; sphere decoding detection;
- 【文献出处】 哈尔滨工程大学学报 ,Journal of Harbin Engineering University , 编辑部邮箱 ,2006年03期
- 【分类号】TN919.3
- 【被引频次】3
- 【下载频次】87