提出一种基于自适应波束形成循环平稳信号算法的STBC系统,首先利用信号的循环平稳性质实现自适应波束形成,然后基于对上行链路感兴趣信号的多个分量的波束形成的估计来构造一对低相关的发送波束,经STBC编码后的即可发送以同时达到分集增益和波束形成增益,并增加下行链路的SNR.提出的方法具有计算简单和快速收敛的性能,可应用于复杂干扰环境下的TDMA无线通信.仿真结果表明这个方法比常规STBC有更好的性能,在误码率为10-4时,可获得5dB增益. A STBC system based on adaptive beamforming cyclic stationary signal algorithm is proposed. Firstly adaptive beamforming is achieved by using the cyclostationarity of the signal, and then based on the estimation of the beamforming of multiple components of the signal of interest on the uplink, For low correlation transmit beams, they can be transmitted after STBC coding to achieve both diversity gain and beamforming gain and increase downlink SNR.The proposed method has the properties of simple and fast convergence and can be applied to complex interference Environment TDMA wireless communication.The simulation results show that this method has better performance than the conventional STBC and gains 5dB gain when the bit error rate is 10-4.