The performance of a packet mode OFDM modem for 5 GHz band high-data-rate wireless LANs

Author

Mizoguchi, Masato ; Enomoto, Kiyoshi ; Onizawa, T. ; Kumagai, Tbmoaki ; Morikura, Masahiro

Author_Institution

NTT Access Network Service Syst. Labs., Kanagawa, Japan

fYear

1999

fDate

1999

Firstpage

295

Lastpage

299

Abstract

This paper describes the configuration and experimental results of a packet mode OFDM modem which is developed for 5 GHz high-data-rate wireless LANs. The prototype, implemented by programmable gate array devices, realizes 1/4 scale operation of 20 Mbit/s transmission. It employs DQPSK-OFDM modulation using 48 subcarriers with convolutional coding of rate 3/4 and it also employs a burst synchronization circuit which performs symbol timing detection and carrier frequency offset compensation. The experimental results show that it achieves good packet error rate performance (0.1% or less) in multipath channels with RMS delay spread of 100 ns

Keywords

OFDM modulation; convolutional codes; differential phase shift keying; error statistics; modems; multipath channels; packet radio networks; quadrature phase shift keying; synchronisation; wireless LAN; 20 Mbit/s; 5 GHz; DQPSK-OFDM modulation; RMS delay spread; burst synchronization circuit; carrier frequency offset compensation; convolutional coding; high-data-rate wireless LAN; multipath channels; packet error rate performance; packet mode OFDM modem; programmable gate array devices; symbol timing detection; Circuits; Convolutional codes; Error analysis; Frequency synchronization; Modems; Modulation coding; OFDM modulation; Prototypes; Timing; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Mobile Multimedia Communications, 1999. (MoMuC '99) 1999 IEEE International Workshop on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-5904-6

Type

conf

DOI

10.1109/MOMUC.1999.819503

Filename

819503