Bit-selective Forward Error Correction for 14Kbps SBC-APCM (AQB) over Digital Mobile Communication Channels

디지털 이동통신 채널상의 14Kbps SBC-APCM(AQB)를 위한 비트선택적 에러정정부호

A forward error correction (FEC) technique is presented for speech data in 16 Kbps digital mobile communications. 14Kbps SBC-APCM(AQB) and QPSK are used as speech coding and modulation techniques, respectively. Because each bit in a speech data block had different importance, applying FEC to speech data bit-selectively in more effective than applying FEC to all speech data equally. To select bits in a speech data block to be protected by FEC the bit error sensitivity of each bit is computed. For a few BCH and Reed-Solomon codes used as bit-selective FEC the performance of the coding technique is computed.