DocumentCode :
1558685
Title :
BER for optical heterodyne DPSK receivers using delay demodulation and integration detection
Author :
Core, Mark T. ; Tan, Harry H.
Author_Institution :
Broadcom Corp., Irvine, CA, USA
Volume :
50
Issue :
1
fYear :
2002
fDate :
1/1/2002 12:00:00 AM
Firstpage :
21
Lastpage :
30
Abstract :
Previous work on the bit error rate (BER) performance of differential phase-shift keying (DPSK) including the effects of additive white Gaussian noise (AWGN) and phase noise has concentrated on the delay demodulator with narrow-band intermediate frequency (IF) bandpass filtering (BPF) and sampling detection. No similar analysis has yet been performed for the delay demodulator with wideband IF bandpass filtering and integration detection. Phase noise is an important consideration in coherent optical communication systems and the most widely accepted model is a Brownian motion process. A closed-form BER expression along with detailed Monte Carlo simulation results are presented for the DPSK delay demodulator with wideband IF bandpass filtering and integration detection filtering including phase noise effects using the Brownian motion model. Analytic expressions are also obtained for the moments of the phase noise component of the decision variable. Using these moments, estimates of the phase noise BER floor are produced. It is found that this receiver has noise performance comparable to receivers with narrowband IF bandpass filtering and sampling detectors for signal-to-noise ratio (SNR) and phase noise in the range of practical interest, but with potentially less degradation due to intersymbol interference (ISI)
Keywords :
AWGN; Brownian motion; Monte Carlo methods; band-pass filters; delays; demodulation; differential phase shift keying; digital simulation; error statistics; filtering theory; heterodyne detection; intersymbol interference; optical modulation; optical receivers; optical signal detection; phase noise; signal sampling; AWGN; Brownian motion model; DPSK delay demodulator; ISI; Monte Carlo simulation results; SNR; additive white Gaussian noise; bit error rate; closed-form BER; coherent optical communication systems; decision variable; delay demodulation; delay demodulator; differential phase-shift keying; integration detection filtering; intermediate frequency; intersymbol interference; narrow-band IF bandpass filtering; noise performance; optical heterodyne DPSK receivers; phase noise BER floor; receiver; sampling detection; sampling detectors; signal-to-noise ratio; wideband IF bandpass filtering; Band pass filters; Bit error rate; Delay; Demodulation; Differential quadrature phase shift keying; Filtering; Optical filters; Optical mixing; Optical receivers; Phase noise;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/26.975740
Filename :
975740
Link To Document :
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