Title :
Feedforward ML-based timing estimation with PSK signals
Author :
Morelli, M. ; D´Andrea, A.N. ; Mengali, U.
Author_Institution :
CNR, Pisa, Italy
fDate :
5/1/1997 12:00:00 AM
Abstract :
We propose a new nondata-aided clock recovery scheme for phase-shift keying (PSK) modulated signals. Its derivation is based on maximum-likelihood (ML) methods and leads to a feedforward structure that can be easily implemented in digital form. The algorithm exhibits improvements with respect to other existing circuits, especially with small excess bandwidth factors. Its performance is assessed by simulation for quaternary PSK (QPSK) and 8PSK formats.
Keywords :
computational complexity; feedforward; maximum likelihood estimation; phase shift keying; synchronisation; timing; 8-PSK; PSK signals; QPSK; feedforward structure; maximum-likelihood method; nondata-aided clock recovery scheme; nonlinearities; phase-shift keying modulation; timing estimation; Bandwidth; Circuits; Clocks; Maximum likelihood estimation; Phase estimation; Phase shift keying; Pulse modulation; Quadrature phase shift keying; Synchronization; Timing;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.585803
