Telecommunications – Transmitter – Mobile or portable
Reexamination Certificate
2011-07-26
2011-07-26
Ferguson, Keith T (Department: 2618)
Telecommunications
Transmitter
Mobile or portable
C455S067110, C455S500000, C455S517000, C455S423000, C370S241100, C370S242000, C370S243000, C370S310000, C370S328000, C375S285000, C375S130000, C375S144000
Reexamination Certificate
active
07986922
ABSTRACT:
Techniques for detecting and suppressing jammers are described. A receiver may perform post-FFT jammer detection and pre-FFT jammer suppression. The receiver may transform an input signal to obtain a frequency-domain signal and may detect for jammers in the input signal based on the frequency-domain signal. The receiver may determine powers of a plurality of carriers based on the frequency-domain signal and may detect for jammers based on peaks in the powers of these carriers. The receiver may filter the input signal (e.g., with a notch filter) to suppress the detected jammers. Alternatively or additionally, the receiver may perform post-FFT jammer detection and post-FFT jammer suppression. The receiver may determine whether jammer is present on each carrier based on data power and channel power for that carrier. The receiver may modify (e.g., zero out or reduce) the frequency-domain signal on carriers with detected jammers.
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Beckman James Edward
Glazko Serguei A.
Patel Shimman
Beladi Sayed H.
Ferguson Keith T
Kordich Donald C.
Qualcomm Incorporated
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