一种新颖的四进制八相时空调制通信定位综合化系统

针对通信定位综合一体化的趋势和未来移动通信发展的需要，本文提出了一种新颖的四进制八相时空调制技术，设计了一种利用36元均匀间隔圆阵天线发射的通信定位综合系统。该系统除具有QPSK的通信能力外，还能测定用户方位，具有抗多径的潜力，文中给出了信号空间的编码，时间域和空间域调制，多天线发射，通信信息的差分相干检测，方位角差分相干估计等关键技术的解决方案，分析了高斯噪声下的误比特率和测角精度。

A new integrated system of communication and radiolocation with quaternary 8 phases space-time modulation

To meet the challenge of future mobile communication and integrated communication and radiolocation systems, a new quaternary 8 phases space time modulation technique with 36 element circular array antenna is proposed. With the modulation, a new integrated system for single antenna terminal is designed, which can find direction, carry with message similar to QPSK, and has a potential to mitigate multipath. The solution of modulating signal through space and time domain, coding signal space, transmitting by multiple antenna, detecting communication and estimating azimuth message with differentially coherent demodulation is given. The performance of bit error rate and accuracy of direction finding in presence of Gaussian noise is investigated.