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本文以2DPSK(双相差分移相键控)方式为例,分析了数字移动通信中的多波干扰特性。主要目的是要表明当存在着两个以上的不希望的同一信道 MDPSK(M 相差分移相键控)干扰波时,数字移动通信系统误码率将被恶化到什么程度。推导出的误码率公式是一个简单的封闭形式,包含了噪声自相关,干扰波自相关以及干扰波数、干扰波的 M 值调制相位,还有多卜勒频率,载波·噪声平均功率比(CNR)和载波·干扰波平均功率比(CIR)。
In this paper, we take 2DPSK (Biphase Differential Phase Shift Keying) as an example to analyze the multi-wave interference in digital mobile communication. The main purpose is to show how much the bit error rate of a digital mobile communications system will be degraded when more than two undesired co-channel MDPSK (M-phase differential phase-shift keying) interferers exist. The derived error rate formula is a simple closed form that includes the noise autocorrelation, the correlation of the interference wave and the number of the interference wave, the modulation phase of the M-value of the interference wave, the Doppler frequency, the average power ratio of the carrier-noise CNR) and carrier-to-interference wave average power ratio (CIR).