Abstract: A process for generating at least one backscattering zone, by at least one transmitter device and to at least one receiver device, of an ambient radio signal emitted by at least one source; and a process for generating at least one reception zone, by the receiver device, of the backscattered ambient signal. The process for includes: determining an emission constraint, when it is respected by the source, for generating at least one backscattering zone in which the received electromagnetic power is greater than a determined threshold, called “backscattering threshold”, and/or generating at least one reception zone in which the received electromagnetic power is less than a determined threshold, called “reception threshold”; and transmitting, by the source, with respect to the emission constraint.

Abstract: A method for selection by an ambient backscatter system including a source as well as transmitting and receiving devices, the source being associated with a precoder for focusing signals towards the devices. Furthermore, the method includes, for a plurality of values ?_1, . . . , ?_N: a phase-shift, by the source, of one of the components of the precoder according to the value ?_i, so as to obtain a precoder Q_i; an emission, by the source, using the precoder Q_i; an acquisition, by the receiving device, of power measurements during non-backscattering and backscattering states, a determination, by the receiving device, of a value D1_i representative of a power deviation between the measurements. The method also includes a selection, by the receiving device, of a maximum value among the values D1_1, . . . , D1_N.

Abstract: A method is described for determining at least one location for backscattering, by at least one transmitter device and to at least one receiver device, of an ambient radio signal, the transmitter device being associated with a zone, a backscattering and a non-backscattering operating state, and a working frequency band. Further, the method is implemented by the transmitter device when it is in the non-backscattering state and comprises travel of the transmitter device in at least one part of the zone, during which the transmitter device acquires, in the working band and in at least one location of the part of the zone, a measurement of electromagnetic power received by the transmitter device, and compares the measurement with a determined threshold, the location associated with the measurement being determined as a location for backscattering if the measurement is greater than the threshold.

Abstract: A process for generating at least one backscattering zone, by at least one transmitter device and to at least one receiver device, of an ambient radio signal emitted by at least one source; and a process for generating at least one reception zone, by the receiver device, of the backscattered ambient signal. The process for includes: determining an emission constraint, when it is respected by the source, for generating at least one backscattering zone in which the received electromagnetic power is greater than a determined threshold, called “backscattering threshold”, and/or generating at least one reception zone in which the received electromagnetic power is less than a determined threshold, called “reception threshold”; and transmitting, by the source, with respect to the emission constraint.