Pulse or digital communications – Repeaters – Testing
Patent
1994-10-11
1997-04-29
Chin, Wellington
Pulse or digital communications
Repeaters
Testing
375296, 380 43, H04B 1500
Patent
active
056256426
ABSTRACT:
Method and apparatus for preparing a message stream of symbols for wireless transmission by pre-coding it through convolution with a characteristic "signature" of predetermined symbols identifying a particular user of the message system. The time duration of the signature should exceed the inter-symbol interval of the message stream in order to reduce the likelihood of error caused by fading in the transmission channel.
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Oppenheim & Shafer, Discrete-Time Signal Processing, 1989, pp. 105-111.
Gregory W. Wornell "Spread-Signature CDMA: Efficient Multiuser Communication in the Presence of Fading" IEEE Transactions on Information Theory vol. 41, No. 5, Sep. 1995 pp. 1418-1438.
John G. Proakis, Digital Communications, 2nd ed., 1989, McGraw-Hill pp. 802-803, 362-372, 821-823, 377-380, 441-451, 728-738.
Armin Wittneben, IEEE GLOBECOM, 1990, "An Energy-and Bandwidth-Efficient Data-Transmission System for Time-Selective Fading Channel".
Chin Wellington
Lucent Technologies - Inc.
Luther William
LandOfFree
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