Accession Number:

ADA411160

Title:

Performance of IEEE 802.11a Wireless LAN Standard Over Frequency-Selective, Slowly Fading Nakagami Channels in a Pulsed Jamming Environment

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s):

Report Date:

2002-12-01

Pagination or Media Count:

128.0

Abstract:

Wireless local area networks WLAN are increasingly important in meeting the needs of the next generation broadband wireless communication systems for both commercial and military applications. In 1999, the Institute of the Electrical and Electronics Engineers IEEE 802.11a working group approved a standard for a 5 GHz band WLAN that supports a variable bit rate from 6 to 54 Mbps, and orthogonal frequency-division multiplexing OFDM was chosen because of its well-known ability to avoid multipath effects while achieving high data rates by combining a high order sub-carrier modulation with a high rate convolutional code. This thesis investigates the performance of the OFDM based IEEE. 802. 11a WLAN standard in frequency-selective, slowly fading Nakagami channels in a pulsed-noise jamming environment. Contrary to expectations, the signal-to-interference ratio SIR required to achieve a specific P does not monotonically decrease when the bit rate decreases. Furthermore, the results show that the performance is improved significantly by adding convolutional coding with Viterbi decoding, and thus highlights the importance of forward error correction FEC coding to the performance of wireless communications systems.

Subject Categories:

  • Cybernetics
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE