Method and apparatus for processing radio signals to identify an active system in a coexisting radio network
First Claim
1. A method for processing a plurality of radio signals to identify an active status of a target system among a plurality of communication systems in a coexisting radio network, comprising the steps of:
- squaring the radio signals to produce a plurality of squared signals;
filtering the squared signals to produce filtered signals containing a plurality of fundamental frequencies of the communication systems in the coexisting radio network;
identifying the target system in the communication systems by detecting the frequency locations of peak energy corresponding to the fundamental frequencies in the filtered signals;
estimating a power spectrum density of the target system; and
identifying an active status of the target system by performing spectrum analysis.
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Accused Products
Abstract
The present invention discloses a method of multiple systems sensing for coexisting radio networks, including: performing energy detection and carrier locking; detecting the fundamental frequencies; and identifying the corresponding active systems from the detected fundamental frequencies and the evaluation of the estimated power spectrum density vector or the estimated trispectrum matrix. Based on the method, an apparatus capable of multiple systems sensing is presented. Furthermore, the present invention also provides an apparatus of multiple systems sensing for coexisting radio networks.
5 Citations
15 Claims
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1. A method for processing a plurality of radio signals to identify an active status of a target system among a plurality of communication systems in a coexisting radio network, comprising the steps of:
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squaring the radio signals to produce a plurality of squared signals; filtering the squared signals to produce filtered signals containing a plurality of fundamental frequencies of the communication systems in the coexisting radio network; identifying the target system in the communication systems by detecting the frequency locations of peak energy corresponding to the fundamental frequencies in the filtered signals; estimating a power spectrum density of the target system; and identifying an active status of the target system by performing spectrum analysis. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for processing a plurality of radio signals to identify an active status of a target system among a plurality of communication systems in a coexisting radio network, comprising:
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an antenna for receiving the radio signals; a squarer coupled to the antenna for squaring the radio signals to produce a plurality of squared radio signals; a filter coupled to the squarer for filtering the squared radio signals to produce filtered signals containing a plurality of fundamental frequencies of the communication systems in the coexisting radio network; a system detecting unit coupled to the filter for identifying the target system in the communication systems by detecting the frequency locations of peak energy corresponding to the fundamental frequencies in the filtered signals; an estimator coupled to the receiver for estimating a power spectrum density of the target system; and a multiple systems monitoring unit coupled to the estimator and the system detecting unit for identifying an active status of the target system by performing spectrum analysis. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus for processing a plurality of radio signals to identify an active status of a target system among a plurality of communication systems in a coexisting radio network, comprising:
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an antenna for receiving the radio signals; a squarer coupled to the antenna for squaring the radio signals to produce a plurality of squared radio signals; a filter coupled to the squarer for filtering the squared radio signals to produce a plurality of filtered signals containing a plurality of fundamental frequencies of the communication systems in the coexisting radio network; and a multiple systems sensing unit coupled to the filter and the antenna for identifying an active status of the target system. - View Dependent Claims (14, 15)
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Specification