Nortel Networks Corporation

Northern Telecom Limited

Blaine Quentin Geddes

Bradley John Morris

Ryan R Santa

Brian James Lehman

Wendy Wing Chi Cheung

Gilles Monette

Finite impulse response filter for multi-code CDMA signals

A basestation transceiver simultaneously addressing multiple air interface standards with cost-effective and efficient allocation of the resources available at the transceiver. The invention significantly reduces the redundancy of the radio frequency equipment used in the transceiver by the use of a common digitizing rate selected to simultaneously accomodate all of the air interface protocols serviced.

Common digitizing rate for multiple air interfaces for generic cell sites in cellular radio

An apparatus and method for power control in a cellular basestation transmitter with multiple digital carrier channels. Each digital carrier signal is attenuated by a digital power control circuit under the control of a microcontroller, the amount of attenuation varying according to the number of active channels. The attenuated digital signals are combined and converted to an analog signal by a digital to analog converter, and the analog signal is amplified by an analog power control circuit also under control of the microcontroller. The combined digital signal may be clipped to reduce the signal peaks, the amount of clipping varying according to the number of active channels.

Wideband multicarrier power control for a cellular PCS basestation tranmitter

A method of performing phase-frequency comparison comprising the steps of receiving first and second clock signals; comparing the signals by triggering flip-flop circuits controlled by AND gates, and providing a first output when first signal is in advance of the second signal, and a second output when second signal is advance of the first signal.

Synthesizable flip-flop based phase-frequency comparator for

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Kemptville, Canada

Blaine Quentin Geddes