统一扩频测控系统接收信号处理技术

Digital Beamforming for Unified Spread Spectrum TT&C System

统一扩频测控体制的多飞行器测控系统应用自适应天线数字多波束形成技术对目标实施跟踪和测控。采用恒模阵列和自适应信号对消器估计出各个信号的波达方向 (DOA) ,应用最小干扰噪声功率判据获得最优加权向量。为了提高天线系统的处理增益 ,用最优加权向量形成波束 ,有效地消除多址干扰的影响。波束形成处理器得到的相对相位偏移向量用于上行遥控信号分时发送时 ,形成对指定目标的高增益波束。

In TT&C system,unified spread spectrum framework and adaptive antenna digital beamforming technologies are used to track, telemetry and command objects. Constant modulus array (CMA) and adaptive signal canceller estimate the direction of arrival (DOA) of every signal and use the optimum weighted vector to form the beams. The phase weighted vectors estimated from DOA improve the processing gain as well as being utilized in the transmitting of tele command signal to form the beam of specified object. Its processing performance is researched and simulated in this paper.