An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems

Qinghe Du; Shihua Zhu; Pinyi Ren

An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems

Qinghe Du
, Shihua Zhu
, Pinyi Ren

Faculty of Electronic and Information Engineering

Xi'an Jiaotong University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

In this paper, we discuss multiuser detection based on wideband code division multiple access (WCDMA) protocols. Multirate transmission and spreading method of WCDMA systems introduce a problem that characteristics of multiple access interference (MAI) change periodically. General adaptive algorithms will not work in that situation. An improved adaptive minimum mean-squared error (MMSE) multiuser detection algorithm is proposed to solve the problem. During our processing procedures, output vector sequence, which is cyclostationary, of matched filter is divided into several stationary vector sequences by down sampling. Then we respectively process those sequences using a bank of adaptive transversal filters using least-mean-square (LMS) algorithm. The improved algorithm is analyzed under FDD mode of WCDMA protocols, in which S(2) short scrambling codes are applied. Simulation result shows that improved multiuser detection algorithm solves multirate problems well and effectively suppresses MAI under AWGN channels and multipath time-varying channels according to IMT-2000 Vehicular Model A. The improved adaptive MMSE algorithm has better performance than conventional detector and improved constant modulus algorithm using the same thinking.

Original language	English
Title of host publication	Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies
Subtitle of host publication	Frontiers of Mobile and Wireless Communication
Pages	317-320
Number of pages	4
State	Published - 2004
Event	Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication - Shanghai, China Duration: 31 May 2004 → 2 Jun 2004

Publication series

Name	Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication
Volume	1

Conference

Conference	Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication
Country/Territory	China
City	Shanghai
Period	31/05/04 → 2/06/04

Keywords

Multiuser Detection
Wideband code division multiple access (WCDMA)

Cite this

Du, Q., Zhu, S., & Ren, P. (2004). An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems. In Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication (pp. 317-320). (Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication; Vol. 1).

Du, Qinghe ; Zhu, Shihua ; Ren, Pinyi. / An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems. Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication. 2004. pp. 317-320 (Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication).

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title = "An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems",

abstract = "In this paper, we discuss multiuser detection based on wideband code division multiple access (WCDMA) protocols. Multirate transmission and spreading method of WCDMA systems introduce a problem that characteristics of multiple access interference (MAI) change periodically. General adaptive algorithms will not work in that situation. An improved adaptive minimum mean-squared error (MMSE) multiuser detection algorithm is proposed to solve the problem. During our processing procedures, output vector sequence, which is cyclostationary, of matched filter is divided into several stationary vector sequences by down sampling. Then we respectively process those sequences using a bank of adaptive transversal filters using least-mean-square (LMS) algorithm. The improved algorithm is analyzed under FDD mode of WCDMA protocols, in which S(2) short scrambling codes are applied. Simulation result shows that improved multiuser detection algorithm solves multirate problems well and effectively suppresses MAI under AWGN channels and multipath time-varying channels according to IMT-2000 Vehicular Model A. The improved adaptive MMSE algorithm has better performance than conventional detector and improved constant modulus algorithm using the same thinking.",

keywords = "Multiuser Detection, Wideband code division multiple access (WCDMA)",

author = "Qinghe Du and Shihua Zhu and Pinyi Ren",

year = "2004",

language = "英语",

isbn = "0780379381",

series = "Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication",

pages = "317--320",

booktitle = "Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies",

note = "Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication ; Conference date: 31-05-2004 Through 02-06-2004",

}

Du, Q, Zhu, S & Ren, P 2004, An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems. in Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication. Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication, vol. 1, pp. 317-320, Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication, Shanghai, China, 31/05/04.

An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems. / Du, Qinghe; Zhu, Shihua; Ren, Pinyi.
Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication. 2004. p. 317-320 (Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems

AU - Du, Qinghe

AU - Zhu, Shihua

AU - Ren, Pinyi

PY - 2004

Y1 - 2004

N2 - In this paper, we discuss multiuser detection based on wideband code division multiple access (WCDMA) protocols. Multirate transmission and spreading method of WCDMA systems introduce a problem that characteristics of multiple access interference (MAI) change periodically. General adaptive algorithms will not work in that situation. An improved adaptive minimum mean-squared error (MMSE) multiuser detection algorithm is proposed to solve the problem. During our processing procedures, output vector sequence, which is cyclostationary, of matched filter is divided into several stationary vector sequences by down sampling. Then we respectively process those sequences using a bank of adaptive transversal filters using least-mean-square (LMS) algorithm. The improved algorithm is analyzed under FDD mode of WCDMA protocols, in which S(2) short scrambling codes are applied. Simulation result shows that improved multiuser detection algorithm solves multirate problems well and effectively suppresses MAI under AWGN channels and multipath time-varying channels according to IMT-2000 Vehicular Model A. The improved adaptive MMSE algorithm has better performance than conventional detector and improved constant modulus algorithm using the same thinking.

AB - In this paper, we discuss multiuser detection based on wideband code division multiple access (WCDMA) protocols. Multirate transmission and spreading method of WCDMA systems introduce a problem that characteristics of multiple access interference (MAI) change periodically. General adaptive algorithms will not work in that situation. An improved adaptive minimum mean-squared error (MMSE) multiuser detection algorithm is proposed to solve the problem. During our processing procedures, output vector sequence, which is cyclostationary, of matched filter is divided into several stationary vector sequences by down sampling. Then we respectively process those sequences using a bank of adaptive transversal filters using least-mean-square (LMS) algorithm. The improved algorithm is analyzed under FDD mode of WCDMA protocols, in which S(2) short scrambling codes are applied. Simulation result shows that improved multiuser detection algorithm solves multirate problems well and effectively suppresses MAI under AWGN channels and multipath time-varying channels according to IMT-2000 Vehicular Model A. The improved adaptive MMSE algorithm has better performance than conventional detector and improved constant modulus algorithm using the same thinking.

KW - Multiuser Detection

KW - Wideband code division multiple access (WCDMA)

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BT - Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies

T2 - Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication

Y2 - 31 May 2004 through 2 June 2004

ER -

Du Q, Zhu S, Ren P. An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems. In Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication. 2004. p. 317-320. (Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication).

An improved adaptive MMSE algorithm for multirate multiuser detection in WCDMA systems

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Keywords

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