Approach to mitigate frequency-selective fading - design of multi-band wavelet packet spreading codes with intra-code subband diversity

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Mobile communication always suffer serious frequency-selective fading due to multipath. Traditional spreading codes are characterized by the fact that the time-domain orthogonality is based on fixed chip width across code length. They may not perform satisfactorily under frequency-selective fading. This paper proposes a new class of CDMA code, wavelet-packet orthogonal codes capable to retain time-domain orthogonality as well as to provide intra-code subband diversity to mitigate frequency-selective fading. The new codes are constructed by congregating several wavelet waveforms with various dilations and shifts. The combination of the wavelet waveforms in different nodes in a wavelet-packet full binary tree enables frequency diversity capability. Owing to the length of even chips, they can facilitate implementing multi-rate streaming and multi-bit spreading. The performance study is carried using statistics correlation distribution convolution (SCDC) algorithm and the results reveal that wavelet-packet codes with multi-band components, combined with RAKE, perform pretty well under frequency-selective fading.

Original languageEnglish
Title of host publicationConference Record / IEEE Global Telecommunications Conference
PublisherIEEE
Pages1590-1594
Number of pages5
Volume3
Publication statusPublished - 2000

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Frequency selective fading
wavelet
Binary trees
Convolution
Code division multiple access
mobile communication
Statistics
dilation
code
Communication

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Global and Planetary Change

Cite this

Chen, H-H. (2000). Approach to mitigate frequency-selective fading - design of multi-band wavelet packet spreading codes with intra-code subband diversity. In Conference Record / IEEE Global Telecommunications Conference (Vol. 3, pp. 1590-1594). IEEE.
Chen, Hsiao-Hwa. / Approach to mitigate frequency-selective fading - design of multi-band wavelet packet spreading codes with intra-code subband diversity. Conference Record / IEEE Global Telecommunications Conference. Vol. 3 IEEE, 2000. pp. 1590-1594
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abstract = "Mobile communication always suffer serious frequency-selective fading due to multipath. Traditional spreading codes are characterized by the fact that the time-domain orthogonality is based on fixed chip width across code length. They may not perform satisfactorily under frequency-selective fading. This paper proposes a new class of CDMA code, wavelet-packet orthogonal codes capable to retain time-domain orthogonality as well as to provide intra-code subband diversity to mitigate frequency-selective fading. The new codes are constructed by congregating several wavelet waveforms with various dilations and shifts. The combination of the wavelet waveforms in different nodes in a wavelet-packet full binary tree enables frequency diversity capability. Owing to the length of even chips, they can facilitate implementing multi-rate streaming and multi-bit spreading. The performance study is carried using statistics correlation distribution convolution (SCDC) algorithm and the results reveal that wavelet-packet codes with multi-band components, combined with RAKE, perform pretty well under frequency-selective fading.",
author = "Hsiao-Hwa Chen",
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Chen, H-H 2000, Approach to mitigate frequency-selective fading - design of multi-band wavelet packet spreading codes with intra-code subband diversity. in Conference Record / IEEE Global Telecommunications Conference. vol. 3, IEEE, pp. 1590-1594.

Approach to mitigate frequency-selective fading - design of multi-band wavelet packet spreading codes with intra-code subband diversity. / Chen, Hsiao-Hwa.

Conference Record / IEEE Global Telecommunications Conference. Vol. 3 IEEE, 2000. p. 1590-1594.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Chen H-H. Approach to mitigate frequency-selective fading - design of multi-band wavelet packet spreading codes with intra-code subband diversity. In Conference Record / IEEE Global Telecommunications Conference. Vol. 3. IEEE. 2000. p. 1590-1594