On the Exact BER of Bit-Wise Demodulators for One-Dimensional Constellations
Artikel i vetenskaplig tidskrift, 2013
The optimal bit-wise demodulator for M-ary pulse amplitude modulation (PAM) over the additive white Gaussian noise channel is analyzed in terms of uncoded bit-error rate (BER). The BER analysis is based on studying the bit patterns that form a labeling. New closed-form BER expressions for 4-PAM with any labeling are developed. Moreover, closed-form BER expressions for 11 out of 23 possible bit patterns for 8-PAM are presented, which enable us to obtain the BER for 8-PAM with some of the most popular labelings, including the binary reflected Gray code and the natural binary code. Numerical results show that, regardless of the labeling, there is no difference between the optimal demodulator and the symbol-wise demodulator for any BER of practical interest (below 0.1).
demodulator
bit-interleaved coded modulation
Additive white Gaussian noise channel
demapper
LLRs
pulse-amplitude modulation
logarithmic likelihood ratio
uncoded transmission
binary reflected Gray code
bit error probability
Författare
Mikhail Ivanov
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
Fredrik Brännström
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
Alex Alvarado
University of Cambridge
Erik Agrell
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
IEEE Transactions on Communications
0090-6778 (ISSN)
Vol. 61 4 1450-1459 6466342Analys och Design av MIMO-BICM
Vetenskapsrådet (VR) (2011-5950), 2012-01-01 -- 2015-12-31.
Styrkeområden
Informations- och kommunikationsteknik
Ämneskategorier
Telekommunikation
DOI
10.1109/TCOMM.2013.13.120401