Analysis on bit-error characteristics of channel codec in digital mobile communications system

Author

Abe, Masami ; Shiino, Haruhiro ; Shoji, Yasuo

Author_Institution

Oki Electr. Ind. Co. Ltd., Tokyo, Japan

fYear

1991

fDate

19-22 May 1991

Firstpage

17

Lastpage

22

Abstract

A calculation algorithm for the bit likelihood in the π/4 shifted DQPSK (differential quadrature phase shift keying) is proposed, and the bit-error correction ability of the soft decision using the calculated likelihood is indicated. Some frames in which the bit errors are concentrated on the multipath fading channel are investigated, and the required equalizing ability to make the bit-error rate after the decoder less than 10^-3 is shown. The effect of the bit-error concentration on the distribution of the bad frames is considered

Keywords

codecs; digital radio systems; error correction; error statistics; fading; mobile radio systems; phase shift keying; π/4 shifted DQPSK; bit likelihood; bit-error characteristics; bit-error correction; bit-error rate; channel codec; decoder; differential quadrature phase shift keying; digital mobile communications system; multipath fading channel; soft decision; Bit error rate; Codecs; Communication industry; Convolutional codes; Decoding; Europe; Fading; Laboratories; Mobile communication; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1991. Gateway to the Future Technology in Motion., 41st IEEE

Conference_Location

St. Louis, MO

ISSN

1090-3038

Print_ISBN

0-87942-582-2

Type

conf

DOI

10.1109/VETEC.1991.140436

Filename

140436