Trade-offs between diversity combining and equalization for wireless LANs

Author

Ng, J.C.-L. ; Letaief, K. Ben ; Murch, R.D.

Author_Institution

Hong Kong Univ. of Sci. & Technol., Kowloon, Hong Kong

Volume

2

fYear

1997

fDate

4-7 May 1997

Firstpage

875

Abstract

In wireless LAN applications with high transmission rates of up to 10-20 Mbit/s the problem of multipath intersymbol interference (ISI) due to frequency selective fading occurs. Adaptive equalization and diversity combining are two possible techniques for combating multipath ISI. The complexity of digital signal processing on the received signals is one of the main issues of these techniques. We investigate the performance and computational complexity trade-offs between diversity combining and equalization in a quasi-stationary frequency-selective fading with AWGN by means of computer simulations. We consider both MMSE combining and selection diversity combining with up to four diversity antenna branches. The results is useful in determining the number of diversity branches and feedforward and feedback equalization tap weights in the wireless LAN design

Keywords

Gaussian noise; adaptive equalisers; computational complexity; diversity reception; fading; feedback; feedforward; intersymbol interference; least mean squares methods; performance evaluation; white noise; wireless LAN; 10 to 20 Mbit/s; AWGN; ISI; MMSE combining; adaptive equalization; computational complexity; computer simulations; digital signal processing; diversity antenna branches; feedback equalization tap weights; feedforward equalization tap weights; frequency selective fading; high transmission rates; multipath intersymbol interference; performance; received signals; selection diversity combining; wireless LAN design; AWGN; Adaptive equalizers; Computational complexity; Digital signal processing; Diversity reception; Fading; Frequency diversity; Intersymbol interference; Signal processing; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1997, IEEE 47th

Conference_Location

Phoenix, AZ

ISSN

1090-3038

Print_ISBN

0-7803-3659-3

Type

conf

DOI

10.1109/VETEC.1997.600454

Filename

600454