Wi-lan Inc.

Nortel Networks Corporation

Apple Inc.

Microsoft Technology Licensing, LLC

Other

Ericsson Ab

Soma Networks, Inc.

Rockstar Consortium US LP

6harmonics Inc.

Taiwan Semiconductor Manufacturing Comp. Ltd.

Shiquan Wu

Wen Tong

Jung Yee

Claude Royer

Leo L Strawczynski

Peiying Zhu

Guo Qiang Wang

Xixian Chen

Edward Sich

Song Zhang

Jianglei Ma

Ming Jia

Jianming Wu

Lingjie Li

Vajira Samarasooriya

Mo-Han Fong

Hua Xu

Keith Russell Edwards

Daniel Boudreau

Shalini Suresh Periyalwar

Timothy David Collings

David G Steer

Steve Andre Beaudin

Koon Hoo Teo

Dongxun Jia

Neil Birkett

Baohong Sun

Rene Lamontagne

An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

Adaptive time diversity and spatial diversity for OFDM

In a wireless multi-hop relay network arranged in a tree topology, the base station and one or more relay stations are associated as a virtual base station (VBS). The base station and each relay station have a unique virtual base station identifier (VBS-ID) associated with the path defined by the base station and the one or more relay stations. A relay station in the branch uses its VBS-ID for communicating with an attached subscriber station (e.g. a mobile station) such that communications between the base station and subscriber station occur via the VBS. Subscriber station data communications are relayed between the base station and the one or more relay stations over the VBS via a tunnel connection. The VBS is auto configurable. Mobility for subscriber stations and 10 relay stations is provided through reconfiguration of VBS's.

Method and system for a wireless multi-hop relay network

Systems and methods for transmitting and receiving OFDM symbols are provided which enable the otherwise wasted transmission time normally used as a prefix for each OFDM symbol to contain useful information. At the receiver, the received signal is processed to convert received OFDM symbols from a linear convolution with the channel to a cyclic convolution.

OFDM system and method employing OFDM symbols with known or information-containing prefixes

Wireless devices, transmitters, systems and methods are provided that have a narrow band signaling channel and a wide band channel, for example an OFDM channel. In order to save power, the wireless device is nominally powered down with the exception of a receiver specific to the narrow band signaling channel. Once instructed to do so over the narrow band signaling channel, the wireless device wakes up the rest of its wide band receive circuitry.

Signalling channel and radio system for power saving in wireless devices

The present disclosure provides a method and a system for antenna sharing for asynchronous TDD radios comprising an integrated antenna with plurality of antennas and a circuit to limit the co-located transmitters signals, a plurality of transmitters, each transmitter operable on a predetermined set of channels and coupled via a respective transmit switch to a combiner and in turn to an antenna, a plurality of receivers, each receivers operable on a predetermined set of channels and coupled via a respective receive switch to a splitter and in turn to an antenna and a switch controller connected to respective transmit and receive switches for asynchronously connecting at least one transmitter and at least one receiver to the antenna for effecting antenna sharing.

Method and system for antenna sharing

In a wireless multi-hop relay network arranged in a tree topology, the base station and one or more relay stations are associated as a virtual base station (VBS). The base station and each relay station have a unique virtual base station identifier (VBS-ID) associated with the path defined by the base station and the one or more relay stations. a relay station in the branch uses its VBS-ID for communicating with an attached subscriber station (e.g. a mobile station) such that communications between the base station and subscriber station occur via the VBS. Subscriber station data communications are relayed between the base station and the one or more relay stations over the VBS via a tunnel connection. The VBS is autoconfigurable. Mobility for subscriber stations and relay stations is provided through reconfiguration of VBS's.

Whitespace devices can use unused television frequencies for transmission and reception of WiFi OFDM signals. Three contiguous bands, such as former channels 2, 3, and 4, may be bonded together to define a whitespace band. In order to fit a WiFi OFDM signal into this whitespace band, a whitespace device compresses the bandwidth of each WiFi OFDM signal using a specific spectrum mask. Very low transmission power is needed for the modified WiFi OFDM signals, eliminating the need for high power amplifiers and most of the WiFi OFDM designs such as PHY and MAC can be reused with minor modifications.

System and method for data distribution in VHF/UHF bands

Methods and systems for sharing white space with primary services and other emerging services are provided. Signal distribution within a specified location, such as a dwelling, is performed using a home gateway that identifies unused white space, reserves such white space spectrum, and delivers data to one or more devices at the respective location using the reserved spectrum. Signalling between the devices and the gateway is performed over a shared signalling channel, which enables the gateway to advise the devices from where and when to receive data. The gateway also uses a common spectrum reservation OFDM symbol to advise the neighbouring gateways of the local spectrum reservation.

Systems and etiquette for home gateways using white space

Wireless devices, transmitters, systems and methods are provided that have a narrow band signalling channel and a wide band channel, for example an OFDM channel. In order to save power, the wireless device is nominally powered down with the exception of a receiver specific to the narrow band signalling channel. Once instructed to do so over the narrow band signalling channel, the wireless device wakes up the rest of its wide band receive circuitry.

A spectrum manager and base station controller for a wireless radio access network allocates TV band white space to all TV band devices under its control using: an allocation policy; information pulled/pushed from a white space database, spectrum usage data supplied by a spectrum sensing engine, and information received from at least one other peer spectrum manager and base station controller for the wireless radio access network.

Peer-to-peer control network for a wireless radio access network

Growing community of inventors

Nepean, Canada

Shiquan Wu