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Nonlinear device detectionNonlinear device detection description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20090268797, Nonlinear device detection. Brief Patent Description - Full Patent Description - Patent Application Claims
This application claims the benefit of and priority under 35 U.S.C. §119(e) to U.S. Patent Application No. 60/497,142, filed Aug. 21, 2003, entitled “In-Home Device Detection (IDD),” and Ser. No. 60/497,036, filed Aug. 21, 2003, entitled “In-Home Device Detection (IDD),” both of which are incorporated herein by reference in there entirety. 1. Field of the Invention This invention generally relates to communication systems. In particular, an exemplary embodiment of this invention relates to the detection of one or more devices that either directly or indirectly impose nonlinear effects on communication signals. 2. Description of Related Art One of the most problematic aspects of Digital Subscriber Line (DSL) communications is the in-home environment. One of the most troubling aspects of the in-home environment is the presence of unfiltered devices connected to the telephone line such as telephones, answering machines and fax machines. Many of these devices impose nonlinear behavior on transmitted signals. Harmonic frequencies arising from these nonlinearities generate a disturbance that is often the dominant noise source limiting data rates and loop reach. Devices that either directly or indirectly impose nonlinear effects on communication signals will be referred to as nonlinear devices. A device can impose nonlinear behavior on a communication signal in one of many ways. For example, the nonlinear device could receive a communication signal and then actively transmit a nonlinearly distorted version of either the communication signal or its own signal back onto the line where it interferes with the original communication signal. This occurs, for example, when the components with a telephone are forced outside of their linear operating range by, for example, a DSL signal. Alternatively, a nonlinear device could change the output impedance of a communications channel causing an impedance mismatch at the communications channel interface. This consequently could increase the amount of echo at the interface and drive the front-end of the communications device outside of its own linear operating range. An exemplary aspect of this invention relates to device detection. In particular, nonlinear devices can be detected, and upon their detection, a message can be generated that recommends corrective action such as the insertion of a micro-filter between the nonlinear device and the communications channel. For example, in a home environment, DSL communication channels frequently experience disturbances caused by devices that impose nonlinear behavior on transmitted DSL signals. These disturbances can be detected through the detection of harmonic frequencies that are attributable to the nonlinear device(s). Upon the detection of a nonlinear device, corrective action, such as the insertion of a micro-filter between the nonlinear device and the communications channel, can be taken in an effort to increase the data rate and loop reach. In accordance with an exemplary embodiment, data is collected and interpreted to determine if an interfering device is present. If an interfering device is present, a message is generated and presented to a user indicating, for example, that the installation of a micro-filter is appropriate. The system can then determine if the micro-filter was installed properly and, for example, commence communication or, if the micro-filter(s) did not solve the problem, initiate communication with or contact a technician. These and other features and advantages of this invention are described in, or are apparent from, the following description of the embodiments. The embodiments of the invention will be described in detail, with reference to the following figures, wherein: Continue reading about Nonlinear device detection... Full patent description for Nonlinear device detection Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Nonlinear device detection patent application. Patent Applications in related categories: 20090290627 - Code evaluator, code evaluation method, radio communication system, base station and mobile station - The present invention relates to a code evaluation method comprising the steps of computing an auto-correlation function from a generated code; computing an evaluation reference value for determining quality of the generated code based on the auto-correlation function and a weighting factor determined depending on the evaluation reference value; and ... 20090290626 - Programmable duty cycle distortion generation circuit - An integrated circuit is provided comprising: a serial transmitter, a serial receiver and a serial connection providing communication between the serial transmitter and the serial receiver. The integrated circuit further comprises a duty cycle distortion circuit so that the integrated circuit can be stress tested by distorting the duty cycle ... ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Nonlinear device detection or other areas of interest. ### Previous Patent Application: Transceiver architecture Next Patent Application: Wireless communication unit and method for channel estimation Industry Class: Pulse or digital communications ### FreshPatents.com Support Thank you for viewing the Nonlinear device detection patent info. IP-related news and info Results in 2.03374 seconds Other interesting Feshpatents.com categories: Software: Finance , AI , Databases , Development , Document , Navigation , Error paws |
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