Blind and training-assisted subspace code-timing estimation for CDMA with bandlimited chip waveforms

Khaled Amleh, Hongbin Li, Tao Li

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this paper, we present a group of subspace code-timing estimation algorithms for asynchronous code-division multiple-access (CDMA) systems with bandlimited chip waveforms. The proposed schemes are frequency-domain based techniques that exploit a unique structure of the received signal in the frequency domain. They can be implemented either blindly or in a training-assisted manner. The proposed blind code-timing estimators require only the spreading code of the desired user, whereas the training-assisted schemes assume the additional knowledge of the transmitted symbols of the desired user. Through a design parameter of user choice, the proposed schemes offer flexible tradeoffs between performance, user capacity, and complexity. They can deal with both time- and frequency-selective fading channels. Numerical simulations show that the proposed schemes are near-far resistant, and compare favorably to an earlier subspace code-timing estimation scheme that is implemented in the time domain.

Original languageEnglish (US)
Pages (from-to)1735-1745
Number of pages11
JournalIEEE Transactions on Vehicular Technology
Volume53
Issue number6
DOIs
StatePublished - Nov 1 2004

Fingerprint

Code Division multiple Access
Waveform
Code division multiple access
Timing
Chip
Subspace
Frequency selective fading
Fading channels
Frequency Domain
Computer simulation
Fading Channels
Estimation Algorithms
Parameter Design
Time Domain
Trade-offs
Training
Estimator
Numerical Simulation

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

@article{dca0f6a55ed347b0b4a5dc4ea502e64d,
title = "Blind and training-assisted subspace code-timing estimation for CDMA with bandlimited chip waveforms",
abstract = "In this paper, we present a group of subspace code-timing estimation algorithms for asynchronous code-division multiple-access (CDMA) systems with bandlimited chip waveforms. The proposed schemes are frequency-domain based techniques that exploit a unique structure of the received signal in the frequency domain. They can be implemented either blindly or in a training-assisted manner. The proposed blind code-timing estimators require only the spreading code of the desired user, whereas the training-assisted schemes assume the additional knowledge of the transmitted symbols of the desired user. Through a design parameter of user choice, the proposed schemes offer flexible tradeoffs between performance, user capacity, and complexity. They can deal with both time- and frequency-selective fading channels. Numerical simulations show that the proposed schemes are near-far resistant, and compare favorably to an earlier subspace code-timing estimation scheme that is implemented in the time domain.",
author = "Khaled Amleh and Hongbin Li and Tao Li",
year = "2004",
month = "11",
day = "1",
doi = "10.1109/TVT.2004.836963",
language = "English (US)",
volume = "53",
pages = "1735--1745",
journal = "IEEE Transactions on Vehicular Technology",
issn = "0018-9545",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "6",

}

Blind and training-assisted subspace code-timing estimation for CDMA with bandlimited chip waveforms. / Amleh, Khaled; Li, Hongbin; Li, Tao.

In: IEEE Transactions on Vehicular Technology, Vol. 53, No. 6, 01.11.2004, p. 1735-1745.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Blind and training-assisted subspace code-timing estimation for CDMA with bandlimited chip waveforms

AU - Amleh, Khaled

AU - Li, Hongbin

AU - Li, Tao

PY - 2004/11/1

Y1 - 2004/11/1

N2 - In this paper, we present a group of subspace code-timing estimation algorithms for asynchronous code-division multiple-access (CDMA) systems with bandlimited chip waveforms. The proposed schemes are frequency-domain based techniques that exploit a unique structure of the received signal in the frequency domain. They can be implemented either blindly or in a training-assisted manner. The proposed blind code-timing estimators require only the spreading code of the desired user, whereas the training-assisted schemes assume the additional knowledge of the transmitted symbols of the desired user. Through a design parameter of user choice, the proposed schemes offer flexible tradeoffs between performance, user capacity, and complexity. They can deal with both time- and frequency-selective fading channels. Numerical simulations show that the proposed schemes are near-far resistant, and compare favorably to an earlier subspace code-timing estimation scheme that is implemented in the time domain.

AB - In this paper, we present a group of subspace code-timing estimation algorithms for asynchronous code-division multiple-access (CDMA) systems with bandlimited chip waveforms. The proposed schemes are frequency-domain based techniques that exploit a unique structure of the received signal in the frequency domain. They can be implemented either blindly or in a training-assisted manner. The proposed blind code-timing estimators require only the spreading code of the desired user, whereas the training-assisted schemes assume the additional knowledge of the transmitted symbols of the desired user. Through a design parameter of user choice, the proposed schemes offer flexible tradeoffs between performance, user capacity, and complexity. They can deal with both time- and frequency-selective fading channels. Numerical simulations show that the proposed schemes are near-far resistant, and compare favorably to an earlier subspace code-timing estimation scheme that is implemented in the time domain.

UR - http://www.scopus.com/inward/record.url?scp=10244279153&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=10244279153&partnerID=8YFLogxK

U2 - 10.1109/TVT.2004.836963

DO - 10.1109/TVT.2004.836963

M3 - Article

AN - SCOPUS:10244279153

VL - 53

SP - 1735

EP - 1745

JO - IEEE Transactions on Vehicular Technology

JF - IEEE Transactions on Vehicular Technology

SN - 0018-9545

IS - 6

ER -