Code-aided interference suppression for DS/CDMA communications - Part II: Parallel blind adaptive implementations

H. Vincent Poor; Xiaodong Wang

doi:10.1109/26.623076

Code-aided interference suppression for DS/CDMA communications - Part II: Parallel blind adaptive implementations

H. Vincent Poor, Xiaodong Wang

Research output: Contribution to journal › Article › peer-review

200 Scopus citations

Abstract

An adaptive code-aided technique for the simultaneous suppression of narrow-band interference (NBI) and multiple-access interference (MAI) in direct-sequence code-division multiple-access (DS/CDMA) networks is proposed. This technique is based on the recursive least-squares (RLS) version of the minimum mean-square error (MMSE) algorithm for multiuser detection. The convergence dynamics of the RLS blind adaptive algorithm for suppressing the combined NBI and MAI are analyzed. The steady-state performance of this algorithm in terms of the signal-to-interference ratio (SIR) is also derived. Systolic array structures for parallel implementations of the RLS adaptive interference suppression algorithms are then proposed. Versions of the rotation-based QR-RLS algorithms for both the blind adaptation mode and the decision-directed adaptation mode are derived. These algorithms exhibit high degrees of parallelism, and can be mapped to VLSI systolic arrays to exploit massively parallel signal processing computation.

Original language	English (US)
Pages (from-to)	1112-1122
Number of pages	11
Journal	IEEE Transactions on Communications
Volume	45
Issue number	9
DOIs	https://doi.org/10.1109/26.623076
State	Published - 1997

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

Keywords

Blind adaptation
Convergence analysis
DS/CDMA
Interference suppression
Linear mmse multiuser detection
Qr-rls algorithm
Systolic array computing

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10.1109/26.623076

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title = "Code-aided interference suppression for DS/CDMA communications - Part II: Parallel blind adaptive implementations",

abstract = "An adaptive code-aided technique for the simultaneous suppression of narrow-band interference (NBI) and multiple-access interference (MAI) in direct-sequence code-division multiple-access (DS/CDMA) networks is proposed. This technique is based on the recursive least-squares (RLS) version of the minimum mean-square error (MMSE) algorithm for multiuser detection. The convergence dynamics of the RLS blind adaptive algorithm for suppressing the combined NBI and MAI are analyzed. The steady-state performance of this algorithm in terms of the signal-to-interference ratio (SIR) is also derived. Systolic array structures for parallel implementations of the RLS adaptive interference suppression algorithms are then proposed. Versions of the rotation-based QR-RLS algorithms for both the blind adaptation mode and the decision-directed adaptation mode are derived. These algorithms exhibit high degrees of parallelism, and can be mapped to VLSI systolic arrays to exploit massively parallel signal processing computation.",

keywords = "Blind adaptation, Convergence analysis, DS/CDMA, Interference suppression, Linear mmse multiuser detection, Qr-rls algorithm, Systolic array computing",

author = "Poor, {H. Vincent} and Xiaodong Wang",

note = "Funding Information: Paper approved by S. L. Miller, the Editor for Spread Spectrum of the IEEE Communications Society. Manuscript received August 1, 1996; revised January 30, 1997. This work was supported by the U. S. Army Research Office under Grant DAAH04-93-G-0219. This paper was presented in part at the 5th ESA International Workshop on DSP Techniques Applied to Space Communications, Barcelona, Spain, September 25–27, 1996.",

year = "1997",

doi = "10.1109/26.623076",

language = "English (US)",

volume = "45",

pages = "1112--1122",

journal = "IEEE Transactions on Communications",

issn = "0090-6778",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Code-aided interference suppression for DS/CDMA communications - Part II

T2 - Parallel blind adaptive implementations

AU - Poor, H. Vincent

AU - Wang, Xiaodong

N1 - Funding Information: Paper approved by S. L. Miller, the Editor for Spread Spectrum of the IEEE Communications Society. Manuscript received August 1, 1996; revised January 30, 1997. This work was supported by the U. S. Army Research Office under Grant DAAH04-93-G-0219. This paper was presented in part at the 5th ESA International Workshop on DSP Techniques Applied to Space Communications, Barcelona, Spain, September 25–27, 1996.

PY - 1997

Y1 - 1997

N2 - An adaptive code-aided technique for the simultaneous suppression of narrow-band interference (NBI) and multiple-access interference (MAI) in direct-sequence code-division multiple-access (DS/CDMA) networks is proposed. This technique is based on the recursive least-squares (RLS) version of the minimum mean-square error (MMSE) algorithm for multiuser detection. The convergence dynamics of the RLS blind adaptive algorithm for suppressing the combined NBI and MAI are analyzed. The steady-state performance of this algorithm in terms of the signal-to-interference ratio (SIR) is also derived. Systolic array structures for parallel implementations of the RLS adaptive interference suppression algorithms are then proposed. Versions of the rotation-based QR-RLS algorithms for both the blind adaptation mode and the decision-directed adaptation mode are derived. These algorithms exhibit high degrees of parallelism, and can be mapped to VLSI systolic arrays to exploit massively parallel signal processing computation.

AB - An adaptive code-aided technique for the simultaneous suppression of narrow-band interference (NBI) and multiple-access interference (MAI) in direct-sequence code-division multiple-access (DS/CDMA) networks is proposed. This technique is based on the recursive least-squares (RLS) version of the minimum mean-square error (MMSE) algorithm for multiuser detection. The convergence dynamics of the RLS blind adaptive algorithm for suppressing the combined NBI and MAI are analyzed. The steady-state performance of this algorithm in terms of the signal-to-interference ratio (SIR) is also derived. Systolic array structures for parallel implementations of the RLS adaptive interference suppression algorithms are then proposed. Versions of the rotation-based QR-RLS algorithms for both the blind adaptation mode and the decision-directed adaptation mode are derived. These algorithms exhibit high degrees of parallelism, and can be mapped to VLSI systolic arrays to exploit massively parallel signal processing computation.

KW - Blind adaptation

KW - Convergence analysis

KW - DS/CDMA

KW - Interference suppression

KW - Linear mmse multiuser detection

KW - Qr-rls algorithm

KW - Systolic array computing

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Code-aided interference suppression for DS/CDMA communications - Part II: Parallel blind adaptive implementations

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