Approaches for backscattering

A method for a backscatter device, the method comprising:

• receiving a signal packet from an orthogonal frequency division multiplex (OFDM) transmitter, the signal packet comprising:
• an initial portion configured to trigger circuitry of the backscatter device for operation, and configured to transfer energy to the backscatter device;
• at least one data carrying portion configured to provide control information to the backscatter device regarding backscatter transmission;
• and
• at least one illuminating portion configured to cause backscatter transmission by the backscatter device within a duration of the illuminating portion and in accordance with the provided control information;
• and
• harvesting energy from at least the initial portion.

An apparatus for an orthogonal frequency division multiplex (OFDM) transmitter, the apparatus comprising:

• controlling circuitry configured to cause transmission of a signal packet for illumination of a backscatter device, the signal packet comprising:
• an initial portion configured to trigger circuitry of the backscatter device for operation, and configured to transfer energy to the backscatter device;
• at least one data carrying portion configured to provide control information to the backscatter device regarding backscatter transmission;
• and
• at least one illuminating portion configured to cause backscatter transmission by the backscatter device within a duration of the illuminating portion and in accordance with the provided control information.

An apparatus for a backscatter device, the apparatus comprising controlling circuitry configured to:

• cause reception of a signal packet from an orthogonal frequency division multiplex (OFDM) transmitter, the signal packet comprising:
• an initial portion configured to trigger circuitry of the backscatter device for operation, and configured to transfer energy to the backscatter device;
• at least one data carrying portion configured to provide control information to the backscatter device regarding backscatter transmission;
• and
• at least one illuminating portion configured to cause backscatter transmission by the backscatter device within a duration of the illuminating portion and in accordance with the provided control information;
• and
• harvest energy from at least the initial portion.