This is the AWGN Channel 4 phase shift keying modulation, as well as its perf...
这是在AWGN信道下四相键控调制，以及其性能分析。
Compared to current phase shift keying (PSK) modulation by a code, there is a further modulation by a sub-carrier.
与当前通过编码的相移键控(PSK)调制相对，还存在另外的通过子载波的调制。
To cope with the problem of phase shifts caused by different propagation paths (especially in HF links), the modulation is done in differential phase shift keying (DPSK).
为了克服由多径传播造成的相移失真难题(特别是在HF链路里)，调制采用差分相移键控(DPSK)来完成。
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