Exploiting the synergies of circular simplex turbo block coding and wavelet packet modulation

Authors:
Erik Kjeldsen;Jeffrey C. Dill;Alan R. Lindsey
Affiliations:
Scientific Research Corporation, Atlanta, GA;Ohio University, Athens, OH;Air Force Research Laboratory, Rome, NY
Venue:
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume II
Year:
2003

Citing 3
Cited 2

Microwave Mobile Communications

Microwave Mobile Communications
Wavelet packet modulation for orthogonally multiplexedcommunication

IEEE Transactions on Signal Processing
Rayleigh fading channels in mobile digital communication systems. I. Characterization

IEEE Communications Magazine

Review: On the statistical decorrelation of the wavelet packet coefficients of a band-limited wide-sense stationary random process

Signal Processing
Data Transmission Oriented on the Object, Communication Media, Application, and State of Communication Systems

International Journal of Interdisciplinary Telecommunications and Networking

Quantified Score

Hi-index	0.00

Visualization

Abstract

This paper describes an experimental implementation of an interference avoidance waveform, suitable for mobile or fixed wireless channels, and comprised of orthogonal signaling using wavelet packets in cohesive combination with a multidimensional channel error coding technique. The patent pending adaptive waveform, known as Circular Simplex Turbo Block Coded Wavelet Packet Modulation (CSTBC-WPM), possesses an unrivaled time-frequency localization and agility capability for avoiding joint narrowband/impulsive interference patterns. Excision of residual interference at the receiver is facilitated by isolation to a sparse number of time-frequency cells and removal using energy thresholding. Moreover, the time dilation of symbols in the WPM sub-bands is useful in mitigating the adverse effects of multipath-induced, frequency-selective fading. For an even more potent countermeasure to non-Gaussian interference sources and channel propagation anomalies, the patent pending CSTBC forward error correction component is distinctly mapped onto the orthogonally multiplexed WPM symbols and interleaved to exploit the sub-band frequency diversity. The shorter block sizes of CSTBC provide a bit error rate performance competitive with Turbo Product Coding's large code blocks, approaching the Shannon limit but with considerably lower latency (up to 20-fold improvement).