Accession Number:

ADA470160

Title:

Performance Analysis of IEEE 802.11g TCM Waveforms Transmitted over a Channel with Pulse-Noise Interference

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

2007-06-01

Pagination or Media Count:

163.0

Abstract:

Trellis-coded modulation TCM is a technique that introduces forward error correction FEC coding without increasing the bandwidth of the channel signal. TCM combines binary convolution codes with M-ary signal constellation. The application of TCM combines FEC coding and M-ary modulation in one operation. The objective of this thesis is to investigate the performance of an orthogonal frequency-division multiplexing OFDM based IEEE 802.11g wireless local area network WLAN standard receiver when the waveform is transmitted over an additive white Gaussian noise AWGN environment combined with pulse-noise-interference PNI, for the trellis-coded modulation TCM waveform specified by the WLAN standard. In addition to a TCM waveform consisting of a rate r23, 4-state, 8-state and 16-state K1, K2, K3, and K4 memory elements convolution code with 8-phase-shift keying 8-PSK modulation analogous to the IEEE 802.11g TCM mode, improvements to the TCM system will be considered. Specifically, two rate r12 convolution codes independently encoding data on the I and Q channels will be modulated with two 4-pulse amplitude modulation 4-PAM waveforms. Both K1 and K2, K2 and K3, and K2 and K4 convolution codes constant number of states and constant constraint length, respectively will be considered.

Subject Categories:

  • Computer Systems
  • Cybernetics
  • Radiofrequency Wave Propagation
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE