In some examples, a method for determining a communication structure to communicatively link a set of delivery unmanned aerial vehicles, UAVs, with a base unit, the communication structure defined by a minimum number of communication UAVs positioned relative to a set of delivery routes of the delivery UAVs at multiple transitory static positions, wherein a communication UAV at a transitory static position supports a communication region, comprises determining a subset of delivery UAVs outside of a communication region of a first communication UAV at a first transitory static position, the subset of delivery UAVs representing a number of unsupported delivery UAVs that are not communicatively linked, via the first communication UAV, to the base unit supplementing the number of communication UAVs with a second communication UAV, and selecting a second transitory static position for the second communication UAV, the second transitory static position minimising a metric representing a number of unsupported delivery UAVs.

A communication system comprising: a pulse generation system comprising one or more pulse repetition frequency (PRF) oscillators and one or more pulse generators, wherein each PRF oscillator is connected to a pulse generator, and wherein each pulse generator is configured to generate a pulse; and three or more transmitters 310a-N, wherein each transmitter is connected to the pulse generation system and wherein the pulse generation system is configured to send a pulse to each transmitter, each transmitter comprising: a pulse delay block configured to introduce a time delay to the pulse sent to the transmitter; and an antenna 314a-N.

A communication system comprising: a pulse generation system comprising one or more pulse repetition frequency (PRF) oscillators and one or more pulse generators, wherein each PRF oscillator is connected to a pulse generator, and wherein each pulse generator is configured to generate a pulse; and three or more transmitters 310a-N, wherein each transmitter is connected to the pulse generation system and wherein the pulse generation system is configured to send a pulse to each transmitter, each transmitter comprising: a pulse delay block configured to introduce a time delay to the pulse sent to the transmitter; and an antenna 314a-N.

Aspects of the subject disclosure may include, for example, a group of controllable surface cells of an intelligent controllable surface, wherein the surface cells include input surfaces in communication with a waveguide and configured to receive an RF carrier signal via the waveguide. The controllable surface also includes a group of output surfaces and a group of control terminals in communication with the controllable surface cells and configured to receive an information signal. The intelligent controllable surface includes a group of controllable devices in communication with the control terminals, wherein the controllable devices are configured to control scattering parameters of the controllable surface cells responsive to the information signal to impress a direct modulation upon the RF carrier signal. Other embodiments are disclosed.

Aspects of the subject disclosure may include, for example, a group of controllable surface cells of an intelligent controllable surface, wherein the surface cells include input surfaces in communication with a waveguide and configured to receive an RF carrier signal via the waveguide. The controllable surface also includes a group of output surfaces and a group of control terminals in communication with the controllable surface cells and configured to receive an information signal. The intelligent controllable surface includes a group of controllable devices in communication with the control terminals, wherein the controllable devices are configured to control scattering parameters of the controllable surface cells responsive to the information signal to impress a direct modulation upon the RF carrier signal. Other embodiments are disclosed.

A wireless communication device includes an antenna array with multiple antenna elements, an array of power amplifiers, and an array of phase shifters. Each antenna element is coupled to a power amplifier and a phase shifter. The device also includes transmitter circuitry coupled to the antenna array to encode a constant amplitude signal, which includes a power amplifier enable code to indicate which power amplifiers are to run in a subsequent data sample and a beam direction code to control beam direction of each phase shifter of the array of phase shifters in the subsequent data sample. The constant amplitude signal is then provided to the array of antenna elements and amplitude and phase modulation is combined over an air interface into a composite modulated signal.

A wireless communication device includes an antenna array with multiple antenna elements, an array of power amplifiers, and an array of phase shifters. Each antenna element is coupled to a power amplifier and a phase shifter. The device also includes transmitter circuitry coupled to the antenna array to encode a constant amplitude signal, which includes a power amplifier enable code to indicate which power amplifiers are to run in a subsequent data sample and a beam direction code to control beam direction of each phase shifter of the array of phase shifters in the subsequent data sample. The constant amplitude signal is then provided to the array of antenna elements and amplitude and phase modulation is combined over an air interface into a composite modulated signal.