Patent ID: 9672394
Date: 2017-06-06
CPC Classifications: G06K,H04B

Claim:
1. A backscatter communication system, comprising: a reader configured to receive backscatter transmissions, the reader comprising: a transmitter configured to emit a radio frequency signal to induce backscatter communication, the transmitter comprising: a continuous wave carrier signal generator that produces a continuous wave carrier signal; and a noise signal generator that generates a noise signal; wherein the transmitter is configured to: add the continuous wave carrier signal and the noise signal to produce a combined signal that is a sum of the continuous wave carrier signal and the noise signal; and transmit the combined signal to induce backscatter communication; and a power allocation subsystem configured to iteratively: observe transmissions of a neighboring reader; and adjust, based on the observed transmissions of the neighboring reader, an amount of power to be allocated to each of the continuous wave carrier signal and the noise signal during transmission of the combined signal to induce backscatter communication, wherein power (P) of the combined signal is held constant, and power of the noise signal and power of the carrier signal are adjusted as aP (a<1) and (1−a)P respectively; wherein (0 <α<1).