现有的关于WDP系统的研究均是针对AWGN信道进行,基于衰落信道的WDP系统研究很少涉及。基于这一问题,研究了衰落信道下的WDP系统容量,得到了发端干扰已知和未知两种情况下的信道容量公式,证明了发端干扰已知时信道容量仅与信道衰减系数和信道噪声有关,与发端干扰无关,即衰落信道下的WDP系统同样具有WDP特性。同时指出,衰落信道下的WDP系统要实现近容量的传输速率,必须要进行信道估计。
The existing study on WDP system are all based on additive-white-Gaussian-noise(AWGN) channel and few focuses on that in fading channel.To attack this issue,the capacity of WDP system in fading channel is studied and two formulas are deduced for known transmitter noise and unknown transmitter noise.It is proved that for the situation of known transmitter noise,the transient channel capacity only depends on channel fading coefficient and channel noise and is irrelevant to the tranmitter noise.It also points out that channel estimation is necessary for WDP system which wants to communicate at near-capacity rate in fading channel.