Method and Apparatus for Transmitting and Receiving High Speed Data Using Code Division Multiple Access Channels

Abstract

PROBLEM TO BE SOLVED: To provide a novel and improved communication system in which a user transmits data using code division multiple access communication channels.

SOLUTION: In a transmitter data is encoded spread and provided to a bank of upconverters. Each upconverter upconverts the spread data to different center frequencies. A switch selects one of the upconverted signals in accordance with a deterministic pseudorandom sequence. The spread data is provided to the upconverter which is driven by a variable frequency synthesizer. In a receiver the received data is passed to a bank of downconverters driven by local oscillators each of which is tuned to a different frequency. The downconverted data is provided to the switch which selects one of the downconverted data streams in accordance with a delayed version of the deterministic sequence used to select the upconversion frequency.

COPYRIGHT: (C)2012JPO&INPIT

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US7027484B1	3G	04/12/2008	ISLD-200812-013	QUALCOMM INC	S1 TS Number: TS 125 212 Version No: ---- Section No: Release : ---- S2 TS Number: TS 125 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 125 331 Version No: ---- Section No: Release : ---- +2 -2	Yes	Basis Patent
CN1162994C	3G	04/12/2008	ISLD-200812-013	QUALCOMM INC	S1 TS Number: TS 125 212 Version No: ---- Section No: Release : ---- S2 TS Number: TS 125 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 125 331 Version No: ---- Section No: Release : ---- +2 -2	No	Family Member
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