Method of Coding Using Multiple Transmit Chains for Reduced Exposure to Electromagnetic Radiation

A method of transmission from an electromagnetic signal transmitting device, comprising:

• utilizing a plurality of transmit chains of the electromagnetic transmitting device to transmit electromagnetic signals;
• adjusting at least one of a phase or an amplitude of at least one of the transmit chains based on a code, wherein:
• the codebook of code words is generated using at least one parameter that characterizes the maximum permissible exposure (MPE) of the electromagnetic signal transmitting device;
• the number of code words satisfies a criterion for quality of reception at an intended receiver;
• the code words are selected, during operation of the transmitting device, in response to data that are to be transmitted.

A transmitter, comprising:

• a plurality of transmit chains, wherein a transmission signal of at least one transmit chain includes at least one of an adjustable phase or an adjustable amplitude;
• a controller operative to adjust at least one of a phase or an amplitude of at least one of the transmit chains according to a code, wherein:
• the codebook of code words is generated using at least one parameter that characterizes electromagnetic radiation intensity of the electromagnetic signal transmitting device;
• the number of code words satisfies a criterion for quality of reception at an intended receiver;
• the code words are selected, during operation of the device, in response to data that are to be transmitted.