Performance prediction of WLAN speech and image transmission

Author

Achatz, R.J. ; Quincy, E.A.

Author_Institution

Inst. for Telecomm. Sci., US Dept. of Commerce, Boulder, CO, USA

Volume

2

fYear

1995

fDate

25-28 Jul 1995

Firstpage

559

Abstract

The effects of multipath, noise, and cochannel interference on performance are shown for two wireless local area networks (WLAN). Measured impulse responses from an office environment provided the multipath distortion. The first WLAN system uses frequency hopped (FH) Gaussian frequency shift keying (GFSK) and the second uses direct sequence (DS) differential binary phase shift keying (DBPSK). Both modulations are part of the proposed WLAN IEEE 802.11 standard. Vocoded speech and image quality were predicted for wireless systems through software simulation by relating quality classes to the following system and channel operational parameters: bit error rate (BER), signal-to-noise ratio (SNR), and carrier-to-interference ratio (CIR). Experimental results are summarized by overlaying image and vocoded speech quality classes on a BER, SNR, and CIR graph

Keywords

IEEE standards; cochannel interference; differential phase shift keying; frequency hop communication; frequency shift keying; image coding; indoor radio; noise; performance evaluation; radiowave propagation; speech coding; telecommunication standards; transient response; vocoders; wireless LAN; DBPSK; GFSK; IEEE 802.11 standard; WLAN; bit error rate; channel operational parameters; cochannel interference; direct sequence differential binary phase shift keying; frequency hopped Gaussian frequency shift keying; image transmission; impulse responses; modulations; multipath distortion; noise; office environment; performance prediction; quality classes; signal-to-noise ratio; software simulation; speech transmission; vocoded speech; wireless local area networks; Binary phase shift keying; Bit error rate; Distortion measurement; Frequency shift keying; Image communication; Image quality; Interchannel interference; Speech; Wireless LAN; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1995 IEEE 45th

Conference_Location

Chicago, IL

ISSN

1090-3038

Print_ISBN

0-7803-2742-X

Type

conf

DOI

10.1109/VETEC.1995.504930

Filename

504930