Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Digital Communication .
Consider a BPSK system with equally likely waveforms s1(t) = cos(ω0t) and
s2(t) = − cos(ω0t). Assume that the received Eb/N0=9.6 dB, giving rise to
a bit error probability of 10-5
, when the synchronization is perfect. Consider
that carrier recovery with the PLL suffers some fixed error φ associated with
the phase estimate, so that the reference signals are expressed as cos(ω0t + φ) and − cos(ω0t + φ).
1. How badly does the bit-error probability degrade when φ = 25 degrees?
2. How large a phase error would cause the bit-error probability to degrade to 10-3?
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