Paper Info
Title
A blind adaptation algorithm for decision feedback equalization for dual-mode CAP-QAM reception.
Abstract
This paper introduces an algorithm for blind adaptation of decision feedback equalizers (DFE), which is applied for equalization in the passband domain. The transmission scheme, which is assumed to be unknown at the receiver side, can either be carrierless amplitude/phase (CAP) modulation or quadrature amplitude modulation (QAM). As the input signal of the passband equalizer is real-valued, the tap weights of the complex-valued feedback filter cannot be identified by a standard whitening approach. We propose therefore an algorithm, which determines a starting coefficient set by means of an infinite impulse response (IIR) equalizer updated by constant modulus algorithm (CMA). For stability reasons, the equalizer's feedback filter is implemented in lattice structure during acquisition. In case of QAM transmission, its tap weights have to be rotated before switching to the DFE. The feedback filter is then fed by the soft decision in order to minimize the probability of wrong solutions.
Year
DOI
Venue
2002
10.1109/GLOCOM.2002.1188090
GLOBECOM
Keywords
Field
DocType
IIR filters,adaptive equalisers,blind equalisers,circuit stability,lattice filters,phase modulation,quadrature amplitude modulation,CAP modulation,DFE,IIR equalizer,QAM,QAM transmission,blind adaptation algorithm,carrierless amplitude/phase modulation,complex-valued feedback filter,constant modulus algorithm,decision feedback equalization,dual-mode CAP-QAM reception,infinite impulse response equalizer,input signal,lattice structure,passband domain equalization,passband equalizer,quadrature amplitude modulation,receiver,soft decision,stability,starting coefficient,tap weights,transmission scheme,wrong solutions probability minimization
Quadrature modulation,Passband,Carrierless amplitude phase modulation,Quadrature amplitude modulation,Equalization (audio),Control theory,Computer science,QAM,Infinite impulse response,Algorithm,Pulse-amplitude modulation
Conference
Volume
Citations 
PageRank 
1
0
0.34
References 
Authors
0
3
Name
Order
Citations
PageRank
Roland Zukunft182.23
Sven Haar2274.10
Thomas Magesacher37312.54