Patent ID: 7746805

Claim:
A communication network comprising: a plurality of first communication devices, each of which comprises a first transceiver which transmits a spread modulated signal, a first receiver which receives phase control information, and a first controller which controls a phase at which the first transceiver transmits the spread modulated signal, using the phase control information; a repeater which generates a code division multiplexed signal by superposing spread modulated signals transmitted respectively by the first communication devices; and a second communication device comprising a second receiver which receives and demultiplexes the code division multiplexed signal, a second controller which determines an optimum phase of the spread modulated signal for each of the first communication devices using the demultiplexed signal, and a second transceiver which transmits the optimum phase to the first receiver as the phase control information, wherein the second controller detects a minimum phase and a maximum phase at which the demultiplexed signal is received normally, and determines that a central value between the minimum phase and the maximum phase is the optimum phase.