引言本文阐述数字匹配滤波技术在射频干涉仪中的一种特殊应用。此系统用于测量协同式射频源相对于多天线接收阵的方位。在该系统中,射频源发射的射频能量由伪噪声序列来调制或由一侧音与一伪噪声序列相组合来调制。然后再用这些信号对载波调相。所选用的伪噪声序列其特性是类噪声的,因而具有类似于脉冲函数的自相关函数。接收天线阵由两个天线和有关的信号处理设备组成。所求的量是被测射频源发射的由伪噪声序列调制的信号之到达时间,如下所述,这些时间的差与所求的方位角有关。如用一伪噪声序列作调制信号,则取数字匹配滤波器输出的相关脉冲发生时间为到达时间(数字匹配滤波器是接收机信号 Introduction This article describes a special application of digital matched filter technology in radio frequency interferometers. This system is used to measure the position of the coordinated radio frequency source relative to the multi-antenna receive array. In this system, the radio frequency energy emitted by a radio frequency source is modulated by a pseudo noise sequence or by a sidetone in combination with a pseudo noise sequence. Then use these signals to phase modulate the carrier. The chosen pseudo-noise sequence is noise-like in nature and therefore has an autocorrelation function similar to a pulse function. The receive antenna array consists of two antennas and the associated signal processing equipment. The amount sought is the arrival time of the signal modulated by the pseudo-noise sequence transmitted by the RF source, as described below, and the difference between these times is related to the desired azimuth. If a pseudo-noise sequence is used as the modulation signal, the relevant pulse output time of the digital matched filter is the arrival time (the digital matched filter is the receiver signal