The rapid growth of commercial cellular and personal communication systems has increased the demand for high data rate, power and bandwidth efficient transmissions. Advanced coding and modulation techniques are suitab...
详细信息
ISBN:
(纸本)9781509059324
The rapid growth of commercial cellular and personal communication systems has increased the demand for high data rate, power and bandwidth efficient transmissions. Advanced coding and modulation techniques are suitable candidates for this purpose as the potential to reduce the symbol period is often limited by the multipath-induced intersymbol interference (ISI). In this paper, a scheme that jointly performs detection, demodulation, and decoding is proposed and is coined the jointdetectordemodulatordecoder (JDDD). The JDDD is a generalization of the previously proposed joint Viterbi detectordecoder (JVDD) that performs detection and decoding of binary phase shift keying (BPSK) modulated signals over ISI channels. The JVDD algorithm performs two operations on a trellis: the first operation computes metrics and retains a set of survivors, while the second operation performs parity checking on the survivors to return the minimum metric legal codeword (MMLC). The JDDD algorithm also has a similar structure but the number of states in JDDD trellis is a factor of the number of symbols defined by the modulator and the characteristics of the ISI channel. In this paper, the performance of the proposed JDDD algorithm is evaluated over an ISI channel.
暂无评论