Qualcomm Incorporated

Other

Roberto Padovani

Charles E Wheatley, Iii

Paul E Bender

Peter J Black

Lindsay A Weaver, Jr

Nagabhushana T Sindhushayana

Matthew Stuart Grob

Klein S Gilhousen

Jurg K Hinderling

Edward George Tiedemann, Jr

Noam A Ziv

Irwin M Jacobs

Andrew J Viterbi

Charles Edward Wheatley

Lindsay A Weaver

Qiang Wu

Gadi Karmi

Joseph P Odenwalder

Brian K Butler

Parag Arun Agashe

Ephraim Zehavi

Eduardo A S Esteves

Rajiv Vijayan

Rashid Ahmed Attar

Jeffrey Alexander Levin

Bruce A Judson

Naga Bhushan

John Edward Smee

Ayman Fawzy Naguib

Jilei Hou

Ahmad Jalali

Yeliz Tokgoz

Paul Eric Jacobs

Pranav Dayal

Je Woo Kim

Andrew P Dejaco

William Robert Gardner

Wanlun Zhao

Kenneth David Easton

S Katherine Lam

Edward G Tiedemann

Stephen William Edge

Yu-Cheun Jou

Young Cheul Yoon

Robert Howard Kimball

Thomas Wilborn

Robert D Blakeney, Ii

Henry David Pfister

John G McDonough

Greg M Hoagland

Bruce R Meagher

Daniel Ray Kindred

Timothy I Rueth

Alessandro Vanelli Coralli

Robert D Blakeney

Ramin Rezaiifar

Leonid Sheynblat

Rashid Ahmed Akbar Attar

Chong U Lee

Mehmet Izzet Gurelli

Roy Franklin Quick, Jr

Alejandro Raul Holcman

Jack K Wolf

Roy F Quick

Samir Khalil Khazaka

Paul T Williamson

Walid M Hamdy

Peter John Black

Ryan Michael Carey

Arik Mimran

David B Munsinger

Gil Bar-David

S Hossain Beladi

Charles E Wheatly, Iii

Noam Abraham Ziv

Methods and apparatus for piecewise linear neuron modeling and implementing artificial neurons in an artificial nervous system based on linearized neuron models. One example method for operating an artificial neuron generally includes determining that a first state of the artificial neuron is within a first region; determining a second state of the artificial neuron based at least in part on a first set of linear equations, wherein the first set of linear equations is based at least in part on a first set of parameters corresponding to the first region; determining that the second state of the artificial neuron is within a second region; and determining a third state of the artificial neuron based at least in part on a second set of linear equations, wherein the second set of linear equations is based at least in part on a second set of parameters corresponding to the second region.

Piecewise linear neuron modeling

Briefly, in accordance with one embodiment, a method of transmitting signals is provided. Signal waveforms are transmitted from at least two respective sectors. The at least two respective sectors are from at least two different sets of a superset of sectors. The transmitted signal waveforms include signal waveforms at least nearly mutually orthogonal at least along a particular signal dimension. An advantage of such an embodiment, for example, is reduced signal interference.

Positioning using enhanced pilot signal

A pilot reference transmission scheme well suited for high data rate wireless communication systems is disclosed. To maximize the amount of interference from transmissions from neighboring transmission sources (e.g., access points or base stations) during the pilot interval, and hence minimize the amount of interference from non-transmitting sources during the data intervals, the pilot references are transmitted in bursts at predetermined time intervals, and the pilot bursts from the access points are synchronized. This results in maximum interference contributions from non-transmitting neighboring access points, facilitating reliable estimation of worst case carrier-to-interference (C/I), and further allows the receiving devices (e.g., access terminals) to easily recognize the bursts as pilot reference. In one embodiment, each access point transmits the pilot bursts at or near its maximum transmit power level and no user-specific data is transmitted during the pilot bursts.

Pilot reference transmission for a wireless communication system

Enhanced pilot signal

A method and system for reverse link interference cancellation. One method comprises demodulating and decoding at least one signal sent from at least one access terminal and received by a first base station, sending demodulated, decoded information of the signal to a second base station, reconstructing the signal at the second base station, and subtracting the reconstructed signal from a buffer at the second base station.

Reverse link interference cancellation

In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.

Method and apparatus for high rate packet data transmission

Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.

Method and apparatus for canceling pilot interference in a wireless communication system

Techniques to improve the acquisition process in a spread spectrum environment. The signals from different CDMA systems are spread with different sets of PN sequences, with the PN sequences in each set being uncorrelated to the PN sequences in the other sets. The mobile station can attempt to acquire the pilot signal by processing the received signal with a first set of PN sequences corresponding to a first hypothesis of the particular signal being acquired. If acquisition of the pilot signal fails, a second set of PN sequences corresponding to a second hypothesis is selected and used to process the received signal. The PN sequences in the second set are uncorrelated to the PN sequences in the first set.

PN generators for spread spectrum communications systems

A communication system that allows a soft handoff to be completed, even when the communications link between the active base station and the mobile station deteriorates before the mobile station has received the handoff direction message. The mobile station maintains a list of base stations that the mobile station is in communication with, referred to as an 'Active Set'. In addition, the mobile station maintains another list of base stations that are proximate to the base stations in the active set. This list is referred to as the 'Neighbor Set'. In accordance with the disclosed method and apparatus, the mobile station places a base station in the active set upon including the base station in a pilot strength measurement message (PSMM). The mobile station monitors transmissions from all of the base stations on the active set to receive a handoff direction message (HDM).

Method and apparatus for robust handoff in wireless communication systems

Growing community of inventors

San Diego, CA, United States of America

Roberto Padovani