Wireless direct sequence spread spectrum digital cellular teleph

Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions

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370335, 375208, 375376, 379 58, 455 541, 455 71, H04B 7216, H04J 1302

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057346399

ABSTRACT:
An exceptionally efficient operation is achieved through the use of orthogonal code divisional multiple access radio communication between a base station and a plurality of user handsets. Each user handset is provided with a local oscillator. The base station transmits a reference pilot/sounding signal which is received at the user handsets and the local oscillators at the user handsets are phase locked to the reference pilot/sounding signal.

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Viterbi, "CDMA Principles of Spread Spectrum Communication", Addison-Wesley Publishing Company, pp. 224-227, Jun. 1995.

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