Radiotelephone system employing digitized speech/data and embedded signalling

摘要: A radiotelephone system in which the signalling protocol for is embedded frame synchronization of digital messages transmitted on system. System state communication achieved by utilizing a sequence normal words and their ones complement inverses. Reliability coding detecting or inverse as binary levels when fewer than predetermined number bit errors exist sequence. If exceeded, selected one zero subtituted (3003). This decoded (3101) Hamming distance between masked calculated (3207). calculation yields greater error correction capability thge function, new set substituted tried (3205), otherwise accepted correct.