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针对二相编码信号经过数字信道化接收机会产生包络缺口现象,通过改变了信号与接收机相关参数,发现对包络缺口个数正确估计的条件要强于对脉宽的估计,且位于信道边沿的信号不能保证包络缺口个数的正确估计。该研究以包络缺口个数与二相编码相位跳变点相等,脉宽估计相对误差小于10%作为正确接收的条件,得到了信号带宽与信道带宽之间的定量关系:当信号载频与信道中心的距离不大于信道带宽的44.4%时,可正确接收的信号带宽为信道带宽的0.493;当距离不大于信道带宽的37.2%时,可正确接收的信号带宽增大至信道带宽的0.704;该结果对不同的编码方式依然成立。
Aiming at the problem that the two-phase encoded signal undergoes envelope notch phenomenon through digital channelized receiver, by changing the parameters of the signal and the receiver, it is found that the condition of correct estimation of the number of envelope notch is stronger than the estimation of the pulse width and is located at the edge of the channel The signal does not guarantee a correct estimate of the number of envelope gaps. In this study, the quantitative relationship between the signal bandwidth and the channel bandwidth is obtained by taking the number of envelope gaps equal to the phase transition point of two-phase encoding and the relative error of pulse width estimation less than 10% When the distance between channel centers is not more than 44.4% of the channel bandwidth, the signal bandwidth that can be correctly received is 0.493 of the channel bandwidth; when the distance is not more than 37.2% of the channel bandwidth, the signal bandwidth that can be correctly received increases to 0.704 of the channel bandwidth; The result of different coding methods still holds.