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

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2 Author(s)
Chiu, M.C. ; Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Chao, C.C.

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

Published in:

Communications, IEE Proceedings-  (Volume:144 ,  Issue: 6 )