Matched Filter Mismatch Losses in MPSK and MQAM Using Semi-Analytic BEP Modeling
David Peckham
The focus of this paper is the bit error probability (BEP) performance
degradation when the transmit and receive pulse shaping filters are
mismatched. The modulation schemes considered are MPSK and MQAM.
In the additive white Gaussian noise (AWGN) channel both spectral
efficiency and noise mitigation is commonly achieved by using
square-root raised cosine (SRC) pulse shaping at both the transmitter
and receiver. The novelty of this paper primarily lies in the use
semi-analytic BEP simulation for conditional error probability calculations,
with transmit and receive filter mismatch, the optional inclusion of a small FIR equalizer.
For lower order MPSK and MQAM, i.e., 8PSK and 16QAM power degradation at
is 0.1 dB when the excess bandwidth mismatch tx/rx = 0.25/0.35 or 0.35/0.25,
but quickly grows as the modulation order increases and/or the mismatch increases.
digital modulation, pulse shaping, phase-shift keying, quadrature amplitude modulation
DOI10.25080/Majora-342d178e-00e