【摘要】 由于差分酉空时码信号星座点之间的分集乘积是影响系统的重要因素.本文利用代数理论构造出一种正交旋转的差分酉空时码的信号星座集,使得原循环群星座成为新正交旋转星座的一个搜索子集,以扩大信号星座点之间的分集乘积,其误码率性能将比原循环群星座差分酉空时码有2dB多的增益.更多还原

【Abstract】 An orthogonal rotation constellation for Differential Unitary Space-Time Modulation(DUSTM) with traditional cyclic constellation as a searching subset,is proposed for any transmit antennas to larger the diversity product,which is the key property to the performance of the DUSTM.Using this constellation,the symbol error rate performance is improved about 2dB coding gain over traditional cyclic constellation which is a diagonal unitary matrix consisting of Fourier coefficients.更多还原