符号化変調方式を用いた重み付け伝送方式とその特性 : 放送方式,無線・光伝送

抄録

A multilevel weighted channel coding with coded modulation is proposed. This is developed for hierarchical transmission system. including terrestrial digital TV broadcasting. Using proposed channel coding the main portion of the FEC (Forward Error Correction) decoding of all transmission layers can be single. This paper shows some BER (Bit Error Rate) performance simulations and analyzes the error propagation which is characteristic of Viterbi decoding for multiplexed convolutional coding. A method which removes the error propagation is also described, and could be applicable to the European DAB (Digital Audio Broadcasting) system.