Low-decoding-complexity TDM coded modulation with unequal error protection

Author

Chiu, M.C. ; Chao, C.C.

Author_Institution

Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

144

Issue

6

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

372

Lastpage

380

Abstract

For time-division-multiplexed coded modulation schemes with unequal error protection (UEP) proposed in the literature, the receiver requires several independent Viterbi decoders to decode all classes of data. A new UEP coded modulation scheme is proposed which has the advantages that decoding can be done by using a single slightly modified Viterbi decoder and that good coding gains can still be provided. Some new codes are presented with a rate of four bit/2D and percentage of important data ranging from 31.25 to 72.92%, which find potential applications in the envisioned digital broadcast of high-definition television signals. Excellent coding gains from 5.4 to 7.2 dB for the important data, as verified by simulations, can be provided with our scheme by using only eight-state codes

Keywords

Viterbi decoding; computational complexity; digital television; error correction codes; high definition television; television broadcasting; time division multiplexing; trellis coded modulation; video coding; UEP coded modulation; Viterbi decoders; coding gains; digital broadcast; eight-state codes; high-definition television signals; low-decoding-complexity TDM coded modulation; receiver; time-division-multiplexed coded modulation; unequal error protection;

fLanguage

English

Journal_Title

Communications, IEE Proceedings-

Publisher

iet

ISSN

1350-2425

Type

jour

DOI

10.1049/ip-com:19971649

Filename

655611