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提出了一种适用于任意天线数和子载波数MIMO-OFDM系统的高速全分集(球)空频码的新型设计方法。在融合球码和空时码的基础上,该码具有差分几何结构,其速率取决于格子维数和最小距离,通过格子旋转,球空频码可获得全分集。仿真结果表明在高速时编码性能较为理想,且译码复杂度适度。
A new design method of high-speed full-diversity (null) space-frequency codes suitable for any number of antennas and sub-carrier MIMO-OFDM systems is proposed. Based on the fusion of the sphere code and the space-time code, the code has a differential geometry structure, the rate of which depends on the lattice dimension and the minimum distance. Through the lattice rotation, the ball-space code achieves full diversity. Simulation results show that the coding performance is better at high speed and the decoding complexity is moderate.