A system proposal for DAB is investigated. The kernel isorthogonal frequency division multiplexing (OFDM) with 4-DPSK(differential phase shift keying) modulation, rectangular pulse-shaping,and a guard interval to reject multipath distortions. Emphasis is on theuse of source-adapted channel coding with rate-compatible puncturedconvolutional (RCPC) codes. Based on analytical and simulated BER (biterror rate) curves for several propagation conditions and on preliminarysource significance information (SSI), a static code design with unequalerror protection (UEP) is presented that also takes auxiliary dataservices into account. The gain due to UEP is on the order of 8dB insignal power or 25% in bandwidth
展开▼
