Performance of block adaptive modulation schemes for OFDM based WLAN systems

Author

Kannu, Arun Pachai ; Sivanadyan, Thiagarajan ; Subramaniam, Srikanth

Author_Institution

AU-KBC Res. Center, Anna Univ., Chennai, India

fYear

2002

fDate

15-17 Dec. 2002

Firstpage

6

Lastpage

10

Abstract

We have investigated different block adaptive modulation (BAM) techniques for OFDM-based wireless LAN systems. Two new algorithms for bit allocation of a block of subcarriers are proposed and the performance of these schemes is compared with an existing scheme. The IEEE 802.11a physical layer is simulated and performance results are presented under various conditions. Results indicate the advantages of the new algorithms under specific conditions. The effects of channel estimation errors on performance are also studied. We also present a technique to improve the performance of BAM schemes.

Keywords

OFDM modulation; adaptive modulation; channel estimation; multipath channels; wireless LAN; IEEE 802.11a physical layer; OFDM; WLAN; bit allocation; block adaptive modulation schemes; channel estimation errors; multipath channels; wireless LAN; Bit rate; Channel estimation; Interference; Magnesium compounds; Multipath channels; OFDM modulation; Physical layer; Signal to noise ratio; Wide area networks; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Wireless Communications, 2002 IEEE International Conference on

Print_ISBN

0-7803-7569-6

Type

conf

DOI

10.1109/ICPWC.2002.1177235

Filename

1177235