满速率串行级联空时分组MTCM编码方法研究
doi: 10.3724/SP.J.1146.2007.01042
A New Design for Concatenated Space-Time Block Code M-TCM
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摘要: 该文研究了级联空时编码系统在编码增益，分集增益和传输能量效率的限定下最大化传输速率的问题，提出了一种在保留TCM编码方法校验位冗余的同时，还可获得满速率串行级联空时分组TCM编码方法。新方法通过引入具有不同功率分集因子的正交发射码字矩阵，并给出新的译码算法，从而使得新的编码方法在获得满速率的同时还可以获得满分集增益。分析和MATLAB仿真结果表明，在相同的编码状态数下，新方法在编码增益上比现有的满速率超正交空时分组编码方法提高1dB左右。Abstract: The maximization of data rate under the constraint of diversity gain, coding gain and total transmit power is a considerable issue in concatenated orthogonal space-time coding system. Based on the concatenated orthogonal space-time coding design criterion, this paper proposed a novel full-rate concatenated orthogonal space-time block codes with multiple trellis coded modulation approach. By introducing the power diversity factor, a new combining algorithm for maximum likelihood decoding is derived. Simulation are performed over the fast and the slow Rayleigh fading channels to demonstrate the 1dB coding gain of the proposed concatenated orthogonal space-time block codes with multiple trellis coded modulation schemes over the super orthogonal space-time coding schemes.
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