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using the techniques of data demodulateur correlations and multiple filters.

机译:使用数据解调器相关技术和多个过滤器。

摘要

A demodulator useful for demodulating multi-phase differentially coherent phase shift keyed (PSK) signals. In the four phase case, a pair of correlators operate upon the identity and non-identity of the PSK signal and two replicas of itself derived from the preceding baud or frame interval to produce first and second correlation signals. The first and second correlation signals are then filtered by means of first and second digital counter type filters with the direction of counting being controlled by corresponding ones of the correlation signal. The output of the filters are then compared with one another in sign and magnitude to detect the modulating information.
机译:一种解调器,可用于解调多相差分相干相移键控(PSK)信号。在四阶段情况下,一对相关器根据PSK信号的身份和非身份以及从先前的波特或帧间隔得出的两个自身副本进行操作,以产生第一和第二相关信号。然后通过第一和第二数字计数器型滤波器对第一和第二相关信号进行滤波,计数的方向由相关信号中的相应一个控制。然后将滤波器的输出在符号和幅度上相互比较以检测调制信息。

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