New schemes for improving non data-aided symbol timing recovery for QAM receivers in flat fading channels

In this paper we present a digital symbol timing synchronization algorithm based on maximum likelihood theory. The algorithm can be totally implemented in discrete time either by a DSP processor, or in a VLSI chip. The channel average fade duration (AFD) and level crossing rates (LCR) are incorporat...

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Veröffentlicht in:IEEE/AFCEA EUROCOMM 2000 : information systems for enhanced public safety and security S. 75 - 79
Hauptverfasser: Nezami, M.K., Sudhakar, R.
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: Piscataway NJ IEEE 2000
Schlagworte:
Applied sciences
Clocks
Design. Technologies. Operation analysis. Testing
Detection, estimation, filtering, equalization, prediction
Electronics
Equations
Exact sciences and technology
Fading
Feeds
Frequency synchronization
Information, signal and communications theory
Integrated circuits
Integrated circuits by function (including memories and processors)
Maximum likelihood estimation
Quadrature amplitude modulation
Radiocommunications
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal and communications theory
Signal processing algorithms
Signal, noise
Statistics
Telecommunications
Telecommunications and information theory
Timing
Transmitters. Receivers
Fading channels
Performance evaluation
VLSI circuit
Quadrature amplitude modulation
Computer simulation
Signal estimation
Receiver
Chip
Synchronization
Algorithm
Implementation
Average fade duration
Statistical method
Algorithm theory
Level crossing rate
Discrete time
Maximum likelihood
Timing
Digital signal processor
ISBN:078036323X, 9780780363236
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Beschreibung
Zusammenfassung:In this paper we present a digital symbol timing synchronization algorithm based on maximum likelihood theory. The algorithm can be totally implemented in discrete time either by a DSP processor, or in a VLSI chip. The channel average fade duration (AFD) and level crossing rates (LCR) are incorporated into a new estimation approach that improves the symbol timing recovery. The schemes are: (1) smoothed post processing (SPP) estimates, and (2) fade envelope weighted (FEW) estimates. Both schemes incorporate fading statistics into the symbol estimator in order to enhance the estimate while the signal is in fade. We first present their implementations, then compare their performance using computer simulation experiments.
ISBN:078036323X
9780780363236
DOI:10.1109/EURCOM.2000.874776