Semi-blind interference suppression for frequency selective DS-CDMA systems employing space-time block codes

Semi-blind interference suppression for frequency selective DS-CDMA systems employing space-time block codes

This paper considers the problem of interference suppression in short-burst frequency selective direct-sequence code-division multiple access (DS-CDMA) systems that employ space-time block codes in the transmitter. It is assumed that attached to each burst are a certain number of training symbols th...

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Hauptverfasser: Pacheco, R.A., Hatzinakos, D.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Block codes
Frequency division multiaccess
Interference suppression
Intersymbol interference
Iterative algorithms
Multiaccess communication
Multiple access interference
Multiuser detection
Strontium
Time division multiple access
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Hatzinakos, D.
description This paper considers the problem of interference suppression in short-burst frequency selective direct-sequence code-division multiple access (DS-CDMA) systems that employ space-time block codes in the transmitter. It is assumed that attached to each burst are a certain number of training symbols that can be used in the receiver to recover the unknown data in a training-based (least squares) or semi-blind (combination of training and blind) manner. We propose a semi-blind algorithm that works by combining subspace-based estimation with an iterative CMA routine. The algorithm is tested for the special case of Alamouti's space-time block code. Simulation results demonstrate significant gains for the proposed semi-blind procedure over least-squares (training-only) interference suppression.
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subjects Block codes
Frequency division multiaccess
Interference suppression
Intersymbol interference
Iterative algorithms
Multiaccess communication
Multiple access interference
Multiuser detection
Strontium
Time division multiple access
title Semi-blind interference suppression for frequency selective DS-CDMA systems employing space-time block codes
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