近二年来,国内遥测界就QPPM-ASK(量化脉冲位置调制一幅移键控)与PCM-PSK(脉冲编码调制—相移键控)两种遥测体制或系统的性能优劣问题,展开了讨论。文章[1]介绍了QPPM-ASK系统的工作原理;计算了它的误字率P_(ew)与误码率(或称等效比特错误概率)P_(eb);并在此基础上得出结论:在误码率相同的条件下,QPPM-ASK系统的能量效率,高于PCM-PSK系统,即β_Q<β_P。 In the past two years, the domestic telemetry community has conducted discussions on the merits and demerits of the performance of two telemetry systems such as QPPM-ASK (Quantized Pulse Position Modulation-One Amplitude Shift Keying) and PCM-PSK (Pulse Code Modulation-Phase Shift Keying) discuss. The article [1] introduces the working principle of QPPM-ASK system, calculates its error rate P_ (ew) and bit error rate (or equivalent bit error probability) P_ (eb), and on this basis Conclusion: Under the same bit error rate, the energy efficiency of QPPM-ASK system is higher than that of PCM-PSK system, that is, β_Q <β_P.