NDLI: Space-time spreading multilayered CDMA system

Content Provider	IEEE Xplore Digital Library
Author	Ng, B.K. Sousa, E.
Copyright Year	2000
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada (Ng, B.K.)
Abstract	As the information theory has suggested that deploying multiple transmit and receive antenna would bring about a huge capacity gain, future development is driven towards designing a system that would realize this gain in practice. Here, we consider the performance of a new space-time multilayered CDMA structure. The data stream is divided into layers, each of which is modulated with an unique space-time spreading sequence. At the receiver, the linear multiuser MMSE detector is used to recover all layers. Simulation results show that the capacity grows linearly with the number of transmit and receive antenna. We investigate the issue of selecting good space-time sequences to reduce co-interference from other layers. Results show that the joint space-time orthogonal codes exhibit good performance. The proposed structure also provides better immunity against signal loss, when any antenna element experiences failure.
Starting Page	1854
Ending Page	1858
File Size	510619
Page Count	5
File Format	PDF
ISBN	0780364511
DOI	10.1109/GLOCOM.2000.891955
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-11-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Transmitting antennas Receiving antennas Transmitters Space time codes Diversity methods Information theory Detectors Wireless networks Decoding
Content Type	Text
Resource Type	Article

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