Nortel Networks Corporation

Amir Bigloo

Mo-Han Fong

Ahmad Jalali

Geng Wu

David G Steer

Leo L Strawczynski

Ning Guo

Norman P Secord

Robert Matyas

Wookwon Lee

A CDMA mobile communication system is operated asynchronously while using common forward channel PN and Walsh codes. Such operation is enabled by devices in the system that provide measurements of the instantaneous offsets between PN codes of neighboring base stations. Knowledge of instantaneous offsets may be maintained and used to identify base station signals to enable handovers to neighboring base stations. Instantaneous offsets may also be processed over time to identify states of imminent collision so that corrective action can be taken to avoid or minimize collision effects.

Methods and devices for asynchronous operation of a CDMA mobile communication system

Methods and apparatus for transmitting data over a multi-channel CDMA system are disclosed in accordance with the teachings of the present invention wherein the system includes an encoder for encoding a data stream with error correction, an interleaver for interleaving the data stream, a multiplexor for multiplexing a plurality of power control symbols onto the data stream, and an inverse-multiplexor for inverse-multiplexing the data stream onto multiple different communication channels. The system may also include additional error correction encoding and interleaving steps.

Systems and methods of channel coding and inverse-multiplexing for multi-carrier CDMA systems

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Vancouver, Canada

Amir Bigloo