Patent ID: 8502728

Claim:
A method for locating an object within a space using radio tomography, the method comprising: arranging a plurality of radio sensors about said space; transmitting a first radio signal at a first transmit signal strength; receiving said first radio signal at a first radio sensor of said plurality of radio sensors at a first received signal strength; measuring said first received signal strength of said radio signal at said first sensor during a current period; calculating a first path loss by comparing said first transmit signal strength and said first received signal strength; receiving said first radio signal at a second radio sensor of said plurality of radio sensors; measuring a second received signal strength of said first radio signal at said second sensor during a current period; calculating a second path loss by comparing said first transmit signal strength and said second received signal strength; transmitting a second radio signal at second transmit signal strength; receiving said second radio signal at a third radio sensor of said plurality of radio sensors; measuring a third received signal strength of said second radio signal at said third sensor during a current period; calculating a third path loss by comparing said second transmit signal strength and said third received signal strength; and estimating a spatial image of said space based on at least partially said first path loss, said second path loss, and said third path loss; and providing information reflective of said spatial image for perception by a user.