Locating interfering devices in wireless networks using channel adaptation metrics
Patent 7260361 Issued on August 21, 2007. Estimated Expiration Date: 
December 29, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 29, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.InventorAssigneeApplicationNo. 10748867 filed on 12/29/2003US Classes:455/63.1, Distortion, noise, or other interference prevention, reduction, or compensation455/42, Frequency or phase modulation455/67.11, Having measuring, testing, or monitoring of system or part455/114.2, Noise or interference elimination370/210, Fourier transform370/332, Based upon a particular signal quality measurement370/298, LOW SPEED ASYNCHRONOUS DATA SYSTEM (E.G., TELETYPEWRITER SERVICE)375/261, Quadrature amplitude modulation375/268, Amplitude modulation375/271, Angle modulation370/335, Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)455/464, Channel selection or allocation714/704, Error count or rate455/437, Mobile assisted or initiated375/219, TRANSCEIVERS370/204, Plural diverse modulation techniques370/345Combining or distributing information via time channelsExaminersPrimary: Andersen, MatthewAssistant: Pham, Cuan Attorney, Agent or FirmForeign Patent References
International ClassesH04B 1/00H04B 15/00 AbstractA method, apparatus and system relate to detecting an interfering device in a wireless network such as a wireless local area network (WLAN). In wireless networks using orthogonal frequency division multiplexing (OFDM) and adaptive bit loading (ABL), adaptive modulation information should be somewhat symmetric in uplink and downlink directions. By comparing modulation adaptations in the uplink and downlink directions of a communication channel between at least two terminals, identified differences can indicate the presence of a potential interferer in the wireless network. A location of the potential interferer can be estimated if a location of one or more network terminals experiencing interference is known or can be determined. An exemplary implementation for a device of the invention may be as an Access Point (AP) in the WLAN.Field of SearchHaving measuring, testing, or monitoring of system or partNoise, distortion, or unwanted signal detection (e.g., quality control, etc.) Using a test signal Phase measuring (e.g., group delay, propagation effect, etc.) Receiver control signal originates at message transmitter Of a microwave link or system Frequency or phase modulation Distortion, noise, or other interference prevention, reduction, or compensation Noise or interference elimination Contiguous regions interconnected by a local area network Fourier transform Based upon a particular signal quality measurement LOW SPEED ASYNCHRONOUS DATA SYSTEM (E.G., TELETYPEWRITER SERVICE) Quadrature amplitude modulation Amplitude modulation Angle modulation | |
