Tomographic loss factor estimation
First Claim
1. A method for determining a signal power loss relative to a receiver, the method comprising:
- obtaining measured received power levels for each of a plurality of sounding signals from one or more sounding transmitters as measured at a stationary receiver located within a structure, wherein the one or more sounding transmitter is at a known location relative to the receiver upon transmission of a sounding signal and the plurality of sounding signals pass through at least a portion of the structure;
determining a direction of incidence relative to the receiver based at least in part on the known location of the sounding transmitter relative to the receiver for each of the plurality of sounding signals received at the receiver;
calculating a signal loss value for each of the plurality of sounding signals based at least in part on the measured receiver power level of each of the plurality of sounding signals and a corresponding known signal power level relative to the receiver in free space;
generating a signal loss profile for the receiver based at least on the signal loss values and the corresponding direction of incidence of each of the plurality of sounding signals relative to the receiver; and
extrapolating the signal loss values calculated for the plurality of sounding signals broadcast at a sounding frequency to determine a projected signal loss for a transmission frequency of a transmitter collocated with the receiver based on known loss relationships between the sounding frequency and the transmission frequency, wherein the transmitter utilizes a transmission frequency different than the sounding frequency of the plurality of sounding signals.
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Accused Products
Abstract
Determination of a signal loss profile relative to a receiver based on measured signal power of a sounding signal from a sounding transmitter having a known signal power in free space relative to the receiver. The signal loss profile may include a plurality of signal loss values corresponding to a plurality of received sounding signals at the receiver. In an embodiment, the sounding signal may comprise a GNSS navigational signal (e.g., a GPS signal). The signal loss profile may be used to extrapolate signal loss for a transmitter collocated with the receiver. In turn, the signal loss profile may be used in conjunction with a shared spectrum system to model a signal propagation from the collocated transmitter when determining allocation of a shared spectrum resource of the shared spectrum system.
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Citations
34 Claims
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1. A method for determining a signal power loss relative to a receiver, the method comprising:
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obtaining measured received power levels for each of a plurality of sounding signals from one or more sounding transmitters as measured at a stationary receiver located within a structure, wherein the one or more sounding transmitter is at a known location relative to the receiver upon transmission of a sounding signal and the plurality of sounding signals pass through at least a portion of the structure; determining a direction of incidence relative to the receiver based at least in part on the known location of the sounding transmitter relative to the receiver for each of the plurality of sounding signals received at the receiver; calculating a signal loss value for each of the plurality of sounding signals based at least in part on the measured receiver power level of each of the plurality of sounding signals and a corresponding known signal power level relative to the receiver in free space; generating a signal loss profile for the receiver based at least on the signal loss values and the corresponding direction of incidence of each of the plurality of sounding signals relative to the receiver; and extrapolating the signal loss values calculated for the plurality of sounding signals broadcast at a sounding frequency to determine a projected signal loss for a transmission frequency of a transmitter collocated with the receiver based on known loss relationships between the sounding frequency and the transmission frequency, wherein the transmitter utilizes a transmission frequency different than the sounding frequency of the plurality of sounding signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for determining a signal power loss relative to a receiver disposed within a structure, the system comprising:
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a stationary receiver disposed within a structure that is operable to receive a plurality of sounding signals at a measured received power level, each of the plurality of sounding signals having a direction of incidence relative to the receiver from one or more sounding transmitter at a known location relative to the receiver, wherein the sounding signal passes through at least a portion of the structure, and wherein the direction of incidence is determined at least in part on the known location of the sounding transmitter relative to the receiver upon transmission of a sounding signal; a loss determination module, executed by a processor in operative communication with the receiver, that is operative to; calculate a signal loss value for each of the plurality of sounding signals based on the measured received power level and a known signal power level of the sounding signal relative to the receiver in free space, generate a signal loss profile for the receiver based at least in part on the signal loss value and the corresponding direction of incidence of each of the plurality of sounding signals relative to the receiver, and extrapolate the signal loss value calculated for each of the sounding signals at a sounding frequency to determine a projected signal loss for a transmission frequency of a transmitter collocated with the receiver based on known loss relationships between the sounding frequency and the transmission frequency. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification