Spectral Efficient Communications employing 1-Bit Quantization and Oversampling at the Receiver

摘要

To relax power consumption requirements in multigigabit/s communicationssystems low resolution quantization can be used. Information-theoretic resultshave shown that systems employing 1-bit quantization and oversampling are aviable option for this. This work investigates such a structure under theinfluence of additive Gaussian noise and two matched pulse shaping filters. Itis described how a BCJR algorithm, based on a finite-state channel assumption,can be used to reconstruct symbols of higher order modulation schemes thatallow the transmission of more than one bit per symbol. Furthermore, it isshown how symbol sources that are fitted to the 1-bit constraint cansignificantly improve the error rate performance of the system.