With the addition of DPSK baseband signal the anti-dispersion capability of uplink signal and baseband signal is enhanced the downlink transmission performance and receiver sensitivity become better . Besides the influence of modulator at the central station on the receiver sensitivity is reduced .

增加传输DPSK基带信号后， 上行链路信号和DPSK 基带信号的抗色散能力强，下行链路的传输性能和接收端的灵敏度变好，还使中心站调制器对系统接收端灵敏度的影响减少。