Title :
QPSK communications using short 4-ary codes
Author :
Joiner, Laurie L. ; Komo, John J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Alabama Univ., Huntsville, AL, USA
Abstract :
Error control coding matched to the number of symbols of quaternary phase shift keying (QPSK) is considered in this paper. Short nonbinary codes with a set of 4 symbols are used in conjunction with QPSK for improved error performance. These 4-ary symbols match the number of phases used in communicating QPSK. The improved performance relative to uncoded QPSK is demonstrated in terms of equivalent bit error probability. Hard and soft decision decoding are considered
Keywords :
decoding; error statistics; modulation coding; quadrature phase shift keying; 4-ary symbols; QPSK communications; equivalent bit error probability; error control coding; error performance; hard decision decoding; performance; phase; quaternary phase shift keying; short 4-ary codes; short nonbinary codes; soft decision decoding; AWGN; Additive white noise; Computer errors; Decoding; Error correction; Error correction codes; Gaussian noise; Hamming distance; Phase shift keying; Quadrature phase shift keying;
Conference_Titel :
Southeastcon '99. Proceedings. IEEE
Conference_Location :
Lexington, KY
Print_ISBN :
0-7803-5237-8
DOI :
10.1109/SECON.1999.766119
