Title :
Open-loop receiver for MSK with Doppler frequency shift
Author :
Nunes, Fernando D. ; Leitão, José M N
Author_Institution :
Dept. de Engenharia Electrotecnica e de Comput., Inst. Superior Tecnico, Lisbon, Portugal
Abstract :
An open-loop digital receiver performing simultaneous carrier phase/frequency estimation and block (two-bit) detection is proposed for MSK signaling in Gaussian channels affected by Doppler frequency shift. Phase estimation and symbol detection are provided by a parallel bank of matched estimators (each one comprising a phase rotation block and a stochastic nonlinear filter) and by a decision algorithm based on the nonlinear filters´ innovations processes. The Doppler frequency shift, estimated by a Kalman-Bucy (1968) filter coupled with a Kay (1989) estimator, is used for fine tuning of the nonlinear filters. The receiver exhibits a, fast phase/frequency acquisition capability and is able to withstand large carrier frequency deviations. These are essential features in LEO satellite burst communications
Keywords :
Doppler shift; Kalman filters; channel bank filters; digital radio; filtering theory; frequency estimation; matched filters; minimum shift keying; nonlinear filters; phase estimation; radio receivers; satellite communication; signal detection; Doppler frequency shift; Gaussian channels; Kalman-Bucy filter; Kay estimator; LEO satellite burst communications; MSK signaling; block detection; carrier frequency deviation; carrier phase/frequency estimation; decision algorithm; fast phase/frequency acquisition; matched parallel bank estimators; nonlinear filter innovations; nonlinear filter tuning; open-loop digital receiver; phase estimation; phase rotation block; stochastic nonlinear filter; symbol detection; two-bit detection; Couplings; Frequency estimation; Gaussian channels; Nonlinear filters; Phase detection; Phase estimation; Phase frequency detector; Stochastic processes; Technological innovation; Tuning;
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
DOI :
10.1109/GLOCOM.1998.775980
