Design of a low complexity partially adaptive CDMA receiver using conjugate gradient technique

Gau J. Lin; Ta-Sung Lee; Chan Choo Tan

doi:10.1109/GLOCOM.2002.1188118

Design of a low complexity partially adaptive CDMA receiver using conjugate gradient technique

Gau J. Lin^*, Ta-Sung Lee, Chan Choo Tan

^*Corresponding author for this work

Department of Electrical and Computer Engineering

Research output: Contribution to conference › Paper › peer-review

2 Scopus citations

Abstract

A CDMA receiver with enhanced multiple access interference (MAI) suppression is proposed. The design of the receiver involves the following procedure. First, adaptive correlators are constructed at different fingers based on the scheme of generalized side-lobe canceller (GSC) to collect the multipath signals and suppress MAI blindly. In particular, a partially adaptive (PA) realization of the GSC correlators is proposed based on the conjugate gradient (CG) technique. The next step is then a simple coherent combining of the correlator outputs with pilot aided channel estimation. Finally, further performance enhancement is achieved by an iterative scheme in which the signal is reconstructed and subtracted from the GSC correlators input, leading to faster convergence of the receiver. The proposed low complexity PA receiver is suitable for downlink CDMA, and shown to outperform the conventional fully adaptive MMSE receiver by using a small number of pilot symbols.

Original language	English
Pages	443-447
Number of pages	5
DOIs	https://doi.org/10.1109/GLOCOM.2002.1188118
State	Published - 2002
Event	GLOBECOM'02 - IEEE Global Telecommunications Conference - Taipei, Taiwan Duration: 17 Nov 2002 → 21 Nov 2002

Conference

Conference	GLOBECOM'02 - IEEE Global Telecommunications Conference
Country/Territory	Taiwan
City	Taipei
Period	17/11/02 → 21/11/02

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10.1109/GLOCOM.2002.1188118

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title = "Design of a low complexity partially adaptive CDMA receiver using conjugate gradient technique",

abstract = "A CDMA receiver with enhanced multiple access interference (MAI) suppression is proposed. The design of the receiver involves the following procedure. First, adaptive correlators are constructed at different fingers based on the scheme of generalized side-lobe canceller (GSC) to collect the multipath signals and suppress MAI blindly. In particular, a partially adaptive (PA) realization of the GSC correlators is proposed based on the conjugate gradient (CG) technique. The next step is then a simple coherent combining of the correlator outputs with pilot aided channel estimation. Finally, further performance enhancement is achieved by an iterative scheme in which the signal is reconstructed and subtracted from the GSC correlators input, leading to faster convergence of the receiver. The proposed low complexity PA receiver is suitable for downlink CDMA, and shown to outperform the conventional fully adaptive MMSE receiver by using a small number of pilot symbols.",

author = "Lin, {Gau J.} and Ta-Sung Lee and Tan, {Chan Choo}",

year = "2002",

doi = "10.1109/GLOCOM.2002.1188118",

language = "English",

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note = "GLOBECOM'02 - IEEE Global Telecommunications Conference ; Conference date: 17-11-2002 Through 21-11-2002",

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AU - Lin, Gau J.

AU - Lee, Ta-Sung

AU - Tan, Chan Choo

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N2 - A CDMA receiver with enhanced multiple access interference (MAI) suppression is proposed. The design of the receiver involves the following procedure. First, adaptive correlators are constructed at different fingers based on the scheme of generalized side-lobe canceller (GSC) to collect the multipath signals and suppress MAI blindly. In particular, a partially adaptive (PA) realization of the GSC correlators is proposed based on the conjugate gradient (CG) technique. The next step is then a simple coherent combining of the correlator outputs with pilot aided channel estimation. Finally, further performance enhancement is achieved by an iterative scheme in which the signal is reconstructed and subtracted from the GSC correlators input, leading to faster convergence of the receiver. The proposed low complexity PA receiver is suitable for downlink CDMA, and shown to outperform the conventional fully adaptive MMSE receiver by using a small number of pilot symbols.

AB - A CDMA receiver with enhanced multiple access interference (MAI) suppression is proposed. The design of the receiver involves the following procedure. First, adaptive correlators are constructed at different fingers based on the scheme of generalized side-lobe canceller (GSC) to collect the multipath signals and suppress MAI blindly. In particular, a partially adaptive (PA) realization of the GSC correlators is proposed based on the conjugate gradient (CG) technique. The next step is then a simple coherent combining of the correlator outputs with pilot aided channel estimation. Finally, further performance enhancement is achieved by an iterative scheme in which the signal is reconstructed and subtracted from the GSC correlators input, leading to faster convergence of the receiver. The proposed low complexity PA receiver is suitable for downlink CDMA, and shown to outperform the conventional fully adaptive MMSE receiver by using a small number of pilot symbols.

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T2 - GLOBECOM'02 - IEEE Global Telecommunications Conference

Y2 - 17 November 2002 through 21 November 2002

ER -

Design of a low complexity partially adaptive CDMA receiver using conjugate gradient technique

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