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Journal ArticleDOI

A BPSK/QPSK Timing-Error Detector for Sampled Receivers

F. Gardner
- 01 May 1986 - 
- Vol. 34, Iss: 5, pp 423-429
TLDR
A simple algorithm for detection of timing error of a synchronous, band-limited, BPSK or QPSK data stream is proposed and derivation of the s curve reveals a sinusoidal shape.
Abstract: 
A simple algorithm for detection of timing error of a synchronous, band-limited, BPSK or QPSK data stream is proposed. The algorithm requires only two samples per symbol for its operation. One of the two samples is also used for the symbol decision. Derivation of the s curve reveals a sinusoidal shape.

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Citations
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Journal ArticleDOI

Digital Coherent Optical Receivers: Algorithms and Subsystems

Seb J. Savory
- 17 May 2010 - 
TL;DR: In this article, a theoretical analysis of the dual-polarization constant modulus algorithm is presented, where the control surfaces several different equalizer algorithms are derived, including the decision-directed, trained, and the radially directed equalizer for both polarization division multiplexed quadriphase shift keyed (PDM-QPSK) and 16 level quadrature amplitude modulation (PDm-16-QAM).
Journal ArticleDOI

Interpolation in digital modems. I. Fundamentals

F.M. Gardner
- 01 Mar 1993 - 
TL;DR: The author describes the fundamental equation for interpolation, proposes a method for control, and outlines the signal-processing characteristics appropriate to an interpolator.
Journal ArticleDOI

Interpolation in digital modems. II. Implementation and performance

L. Erup, +2 more
- 01 Jun 1993 - 
TL;DR: The NCO-based control method presented in Part I is shown to be equivalent to a conventional phase locked loop and its operation is verified by simulation, demonstrating that simple interpolators give excellent performance.
Journal ArticleDOI

Digital filter and square timing recovery

M. Oerder, +1 more
- 01 May 1988 - 
TL;DR: A digital algorithm is proposed that can be implemented very efficiently even at high data rates and allows free-running sampling oscillators and a novel planar filtering method that prevents synchronization hangups.
Journal ArticleDOI

The modified Cramer-Rao bound and its application to synchronization problems

A.N. D'Andrea, +2 more
- 01 Feb 1994 - 
TL;DR: The modified Cramer-Rao bound (CRB) is introduced which, like the true CRB, is a lower bound to the error variance of any parameter estimator.
References
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Carrier and clock synchronisation for TDMA digital communications

F. M. Gardner