By Topic

An approach to mitigate frequency-selective fading-design of multiband wavelet packet spreading codes with intra-code subband diversity

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Hsiao-Hwa Chen ; Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan

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 a 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 the 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

Published in:

Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE  (Volume:3 )

Date of Conference:

2000