A method of combining signals respectively transmitted in a communication system comprising one or more first transceiving communication devices and one or more second transceiving communication devices,comprising: a) estimating at each of the two or more second transceiving communication devices, a time domain channel response for a radio frequency channel from each of the one or more first transceiving communication devices to each of the two or more second transceiving communication devices based on receiving known signals transmitted from the one or more first transceiving communication devices; b) generating at each of the two or more second transceiving communication devices, a time-reversed channel response from each time domain channel response; c) convolving at each of the two or more second transceiving communication devices, a corresponding time-reversed channel response with an information signal to produce convolved information signals; d) summing and transmitting at each of the two or more second transceiving communication devices, the convolved information signals; and e) receiving and detecting the transmitted signals at each of the one or more first transceiving communication devices to generate a corresponding information signal wherein - step a) includes receiving the known signals comprising a pilot signal and/or step a) comprises estimating a time domain channel impulse response; - step b) includes generating a complex conjugate of the time-reversed channel response; - step d) further includes step d1) delaying each time-reversed channel response prior to step e) such that corresponding transmitted information signals at step e) arrive at respective ones of the one or more first transceiving communication devices at approximately the same time to produce a combined signal and/or step d) comprises coordinating transmissions of the two or more second transceiving communication devices such that a plurality of transmitted summed information signals are respectively transmitted over the radio frequency channel, and in particular wherein step d) comprises starting the coordinated transmissions at a beginning of a second time slot that follows a first time slot. a) estimating at each of the two or more second transceiving communication devices, a time domain channel response for a radio frequency channel from each of the one or more first transceiving communication devices to each of the two or more second transceiving communication devices based on receiving known signals transmitted from the one or more first transceiving communication devices; b) generating at each of the two or more second transceiving communication devices, a time-reversed channel response from each time domain channel response; c) convolving at each of the two or more second transceiving communication devices, a corresponding time-reversed channel response with an information signal to produce convolved information signals; d) summing and transmitting at each of the two or more second transceiving communication devices, the convolved information signals; and e) receiving and detecting the transmitted signals at each of the one or more first transceiving communication devices to generate a corresponding information signal - step a) includes receiving the known signals comprising a pilot signal and/or step a) comprises estimating a time domain channel impulse response; - step b) includes generating a complex conjugate of the time-reversed channel response; - step d) further includes step d1) delaying each time-reversed channel response prior to step e) such that corresponding transmitted information signals at step e) arrive at respective ones of the one or more first transceiving communication devices at approximately the same time to produce a combined signal and/or step d) comprises coordinating transmissions of the two or more second transceiving communication devices such that a plurality of transmitted summed information signals are respectively transmitted over the radio frequency channel, and in particular wherein step d) comprises starting the coordinated transmissions at a beginning of a second time slot that follows a first time slot.