Complexity reduction for MC-CDMA with MMSEC

Keli Zhang; Yong Liang Guan; Qinghua Shi

doi:10.1109/TVT.2007.909294

Complexity reduction for MC-CDMA with MMSEC

Keli Zhang^*, Yong Liang Guan, Qinghua Shi

^*Corresponding author for this work

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

15 Citations (Scopus)

Abstract

The minimum mean square error combining (MMSEC) scheme performs best among various equalization and combining schemes for downlink multicarrier code-division multiple access (MC-CDMA). However, it is also the most computationally complex to realize as it involves the complex matrix inversion operation of a large matrix. In this paper, a new method is proposed to calculate the equalizer coefficient for MMSEC based on reduced-size matrices. It is shown that as long as the number of users is even, the matrix inversion size is reduced to at least N_c/2, where N_c is the number of subcarriers.

Original language	English
Pages (from-to)	1989-1993
Number of pages	5
Journal	IEEE Transactions on Vehicular Technology
Volume	57
Issue number	3
DOIs	https://doi.org/10.1109/TVT.2007.909294
Publication status	Published - May 2008
Externally published	Yes

ASJC Scopus Subject Areas

Automotive Engineering
Aerospace Engineering
Electrical and Electronic Engineering
Applied Mathematics

Keywords

MC-CDMA
Minimum mean square error (MMSE)
MMSE
Multicarrier code-division multiple access (MC-CDMA)

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10.1109/TVT.2007.909294

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AB - The minimum mean square error combining (MMSEC) scheme performs best among various equalization and combining schemes for downlink multicarrier code-division multiple access (MC-CDMA). However, it is also the most computationally complex to realize as it involves the complex matrix inversion operation of a large matrix. In this paper, a new method is proposed to calculate the equalizer coefficient for MMSEC based on reduced-size matrices. It is shown that as long as the number of users is even, the matrix inversion size is reduced to at least Nc/2, where Nc is the number of subcarriers.

KW - MC-CDMA

KW - Minimum mean square error (MMSE)

KW - MMSE

KW - Multicarrier code-division multiple access (MC-CDMA)

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Complexity reduction for MC-CDMA with MMSEC

Abstract

ASJC Scopus Subject Areas

Keywords

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