An adaptive scheme for trellis-coded modulation of MPSK signals called adaptive trellis-coded multiple-phase-shift-keying (ATCMPSK) is proposed for slowly Rayleigh fading channels. The adaptive scheme employs a slightly modified rate 112 convolutional encoder and the corresponding Viterbi decoder to realize a family of codes of different rates which are employed according to channel conditions....

In this article, it is shown that by using the known (or estimated) value of carrier tracking loop SNR in the decision metric, it is possible to improve the error probability performance of a partially coherent multiple phase-shift-keying (MPSK) system relative to that corresponding to the commonly used ideal coherent decision rule. Using a maximum-likelihood approach, an optimum decision metri...

In this paper we concentrate on MPSK carrier frequency estmation based on random data modulation. We present a fast, open-loop frequency estimation and tracking techinque, which combines a feedforward estimator stucture and a recursive least square (RLS) predictor. It is suitable for the frequency estimation and large frequency acquisition and tracking required of burst mode satellite modems op...

This letter shows several methods for improving the decoding of noncoherent trellis-coded M -ary phase-shift keying. We propose two new metrics for basic decision-feedback algorithm. These metrics are derived based on the idea of reducing the effect of incorrect amplitude of the reference signal. We also propose a new decoding algorithm that uses a simple way to estimate the metric of the futur...

Software Radio is a multimode, multiband and multi standard device. So an automatic modulation scheme will be necessary to identify an unknown received signal, in the presence of noise. As the channel capacity varies, modulation scheme switching enables the baud rate to be altered in order to maximize channel capacity usage. The algorithms proposed, differ in their sensitivity to SNR, the type ...

This paper presents a generalized nonlinear (Markov) analysis technique that is used to evaluate the statistical performance of uniforn~ly sampled digital phase-locked loop (DPLL) demodulators. Although the rigorous analysis of the statistical performance of the analog PLL for digitally modulated signals (i.e., Costas loops) remains an open problem, the discrete time analysis for MPSK modulatio...