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Jammer detection and suppression for wireless communication

A technology for interfering signals and signals, applied in the field of communications, can solve the problems of degradation of decoding performance, inability to detect and obtain signals, etc.

Inactive Publication Date: 2014-03-12
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Interfering signals can cause various adverse effects, such as inability to detect and acquire signals from the desired system, degradation of decoding performance, etc.

Method used

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  • Jammer detection and suppression for wireless communication
  • Jammer detection and suppression for wireless communication
  • Jammer detection and suppression for wireless communication

Examples

Experimental program
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Embodiment Construction

[0019] The techniques described herein may be used in various wireless communication systems and networks, eg, broadcast systems, cellular systems, wireless wide area networks (WWANs), wireless metropolitan area networks (WMANs), wireless local area networks (WLANs), etc. The terms "system" and "network" are often used interchangeably. These systems and networks may utilize Orthogonal Frequency Division Multiplexing (OFDM), Single Carrier-Frequency Division Multiplexing (SC-FDM), or some other multiplexing scheme. OFDM and SC-FDM partition the system bandwidth into multiple orthogonal carriers, which may also be referred to as subcarriers, tones, bins, and so on. Each carrier can be modulated with data. In general, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM.

[0020] The technology can be used to implement, for example, Long Term Evolution (LTE) as defined by an organization called the "3rd Generation Partnership Project"...

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PUM

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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.

Description

[0001] This patent application claims priority to U.S. Provisional Application No. 60 / 870,236, filed December 15, 2006, entitled "JAMMER FOR BROADCAST OFDM," and also claims Priority to U.S. Provisional Application No. 60 / 885,370, filed January 17, 2007, entitled "JAMMERDETECTION AND REMOVAL TECHNIQUES," which is assigned to the present assignee person, and is hereby expressly incorporated herein by reference. technical field [0002] The present invention relates generally to communications, and more particularly to techniques for detecting and suppressing jammers. Background technique [0003] Wireless communication systems are widely deployed to provide various communication services such as broadcast, voice, video, packet data, messaging, and the like. These wireless systems include broadcast systems, cellular systems, and the like. Wireless systems may operate in environments where interfering signals may be present. An interfering signal is an inappropriate signal o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10H04L27/26
CPCH04K3/228H04B1/1036H04L27/2647H04B1/10
Inventor 塞尔盖·A·格拉兹克詹姆斯·爱德华·贝克曼希曼·帕特尔
Owner QUALCOMM INC