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US 8,559,532 B2Granted
Method and system for detecting non-linear devices
AssigneeAware, Inc.
InventorChristopher Cunningham
Life of this patent
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AssigneeAware, Inc.
InventorChristopher Cunningham
Estimating the term…
To assist with the detection of unfiltered device(s), a system observes how the received noise changes between two links as the transmit signal is changed. Harmful unfiltered nonlinear devices will generate significant noise that depends on the transmitted signals; therefore, this additional noise can be quantified to some extent by comparing the observed noise for two different transmit signals. The total noise can be determined from the SNR if the received signal is known. The received signal may be read directly in some non-standard systems, or it may be determined from the known transmit signal and channel attenuation, which is sometimes the case in standard-compliant links, but often with a relatively large error. To circumvent this problem, certain embodiments of this invention only consider the change in noise between two links with the same channel attenuation. This differential comparison makes it unnecessary to accurately know the channel attenuation.
A module, including a processor, capable of detecting the presence of a nonlinear device by comparing at least one first parameter value to at least one second parameter value, wherein the first parameter value is from a first link having a first transmit power level and the second parameter value is from a second link having a second different transmit power level, wherein the first link is initiated with a particular PSD (Power Spectral Density) profile, and a determination is made as to whether the first link with the particular PSD profile succeeds or fails, and when the first link fails, an alternative PSD that is more robust against noise is used.
A method of detecting the presence of a nonlinear device comprising:
A non-transitory computer-readable information storage media having stored thereon instructions, that when executed by a processor, cause to be performed a method comprising:
Dependencies are inferred from the claim text.