Hardware and software implementations of an MMSE equalizer for MIMO-OFDM based WLAN

Author

Paker, Özgün ; Van Berkel, Kees ; Moerman, Kees

Author_Institution

Philips Res., Eindhoven, Netherlands

fYear

2005

fDate

2-4 Nov. 2005

Firstpage

1

Lastpage

6

Abstract

Communication over a MIMO (multiple-input-multiple-output) channel promises several advantages: increase in channel capacity, reduced transmit power, greater coverage, and improved link robustness. The minimum mean squared error equalizer (MMSE) is a potential algorithm in addressing the MIMO detection challenge. This paper presents four implementations for the computation of the MMSE equalizer coefficients. The studied options are: (1) a general-purpose microprocessor (ARM926EJ-S); (2) a traditional general purpose DSP (RD16024); (3) an embedded vector processor (EVP₁₆); and (4) a dedicated hardware solution. We show that, the equalizer requires acceleration for real-time processing. In order to obtain a low cost, flexible multi-standard WLAN baseband implementation, EVP₁₆ is the only feasible solution among the four studied.

Keywords

MIMO systems; OFDM modulation; digital signal processing chips; equalisers; least mean squares methods; software engineering; wireless LAN; wireless channels; DSP; MIMO-OFDM; MMSE equalizer; WLAN; channel capacity; embedded vector processor; general-purpose microprocessor; hardware; minimum mean squared error equalizer; multiple-input-multiple-output channel; real-time processing; software implementations; Acceleration; Channel capacity; Digital signal processing; Equalizers; Hardware; MIMO; Microprocessors; Robustness; Vector processors; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Systems Design and Implementation, 2005. IEEE Workshop on

ISSN

1520-6130

Print_ISBN

0-7803-9333-3

Type

conf

DOI

10.1109/SIPS.2005.1579829

Filename

1579829