作者supsymmetry (supsymmetry)
看板comm_and_RF
标题Re: [问题] 请问BPSK coherently demodulation pha …
时间Sat Jan 13 15:41:48 2007
If there is a time synchronization bias, for example pT where p is between (
0,1) and T is the bit time, what's the bit error probability of the coherent
ly detected BPSK?
Thanks in advance.
※ 引述《Leon (Achilles)》之铭言：
: ※ 引述《supsymmetry (supsymmetry)》之铭言：
: : 一个BPSK modulated的信号,在demodulated的时候,如果reference signal的phase
: : 有一个固定的error,比如\phei.也就是说,如果BPSK信号为cos(wt)和-cos(wt);而接
: : 受端的reference signals是 cos(wt+\phei)和 -cos(wt+phei).
: : 那么bit error probability会怎么变化呢?
: : 求一个详细的公式,找了半天没找到.
: : Thanx in advance.
: Check the Synchronization chapter.
: Now your min-distance in the vector space will reduce by the factor,
: cos(r), where r is the phase noise.
: by the way, in BPSK,
: the transmitted signal is cos(wt) , cos(wt + pi),
: if you want to add phase noise in it,
: it should be cos(wt + r), cos(wt + pi + r).
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 59.51.150.38