TMS 32020单片信号处理器在测控系统中的应用

在卫星地面测控系统中,要求在低信噪比(如-20分贝)条件下提取目标的多普勒频率信息,以引导接收机锁相环捕获信号并锁定。模拟式频率引导采用经典的晶体滤波器组,其数量大、成本高、重量体积大。数字式频率引导采用对接收信号采样序列进行FFT运算处理实现对目标的频率捕获,具有显著的优越性。作者等人以8086微机实现的数字频率引导设备已成功地应用于同步通讯卫星测控站中。为了进一步提高处理速度,采用了TMS32020单片信号处理器研制出频率引导快速处理机,使频率引导处理时间提高15倍以上。该成果的硬件设备可适应不同的实时数字信号处理要求,应用于雷达、通讯、遥控、仪器、语音、智能等各种场合。

TMS 32020 single chip signal processor application in measuring and control system

In the satellite ground measuring and control system, it is required that Doppler frequency information of targets is extracted under the condition of low signal to noise ratio(for example-20dB), so that receiver PLL captures signal and locks it. Analogue frequency leading uses classic crystal filter group, it has many shorts, such as a great deal components, high cost and large bulk. While digital frequency leading implements capture of target frequency through the operational processing of received signal sample sequence by FFT, it has obvious superiority. We have implemented the equipment of digital frequency leading by 8086 microcomputer and successively applied in measuring and control station of synchronization communication satellite. In order to increase processing speed, We developed frequency leading fast processor by TMS32020, so processing time of frequency leading has been raised beyong 15 times. The hardware equipments are suitable for different real-time digital processing and apply to radar, communication, remote, instruments, voice and intelligence systems.