An Efficient Circulant MIMO Equalizer for CDMA Downlink: Algorithm and VLSI Architecture

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Guo Yuanbin McCain Dennis Zhang Jianzhong(Charlie) Cavallaro Joseph R.
Abstract	We present an efficient circulant approximation-based MIMO equalizer architecture for the CDMA downlink. This reduces the direct matrix inverse (DMI) of size with complexity to some FFT operations with complexity and the inverse of some submatrices. We then propose parallel and pipelined VLSI architectures with Hermitian optimization and reduced-state FFT for further complexity optimization. Generic VLSI architectures are derived for the high-order receiver from partitioned submatrices. This leads to more parallel VLSI design with further complexity reduction. Comparative study with both the conjugate-gradient and DMI algorithms shows very promising performance/complexity tradeoff. VLSI design space in terms of area/time efficiency is explored extensively for layered parallelism and pipelining with a Catapult C high-level-synthesis methodology.
Related Links	http://dx.doi.org/10.1155/ASP/2006/57134
ISSN	16876172
e-ISSN	16876180
Journal	EURASIP Journal on Advances in Signal Processing
Issue Number	1
Volume Number	2006
Language	English
Publisher	SpringerOpen
Publisher Date	2006-01-01
Publisher Place	United Kingdom
Access Restriction	Open
Subject Keyword	Telecommunication Electronics
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering Hardware and Architecture