Patent ID: 6097762
Filing Date: 2000-08-01
Classification: H04L

Abstract:
A communication system comprising:converting means for converting transmission data into phase difference data;transmission processing means for transmitting a plurality of carriers having different frequencies simultaneously and transmitting said phase difference data on the basis of a phase difference between said carrier; andreception processing means for receiving data transmitted by said transmission processing means based on a phase difference between carriers after a plurality of carriers having different frequencies had been transmitted simultaneously including first demodulating means for demodulating a reception signal by a carrier having a first frequency, second demodulating means for demodulating said reception signal by a carrier having a second frequency different from said first frequency, first phase-detecting means for detecting a change of a phase of an output from said first demodulating means during a predetermined period, second phase-detecting means for detecting a change of a phase of an output from said second demodulating means during a predetermined period, a phase difference detecting means for detecting a difference between detected phases supplied thereto from said first and second phase-detecting means, and second converting means for converting phase difference data detected by said phase difference detecting means into a system output signal,wherein said reception processing means for receiving data transmitted due to a phase difference between carriers is composed of one-bit system analog-to-digital converters for sampling the reception signal, means for obtaining complex conjugate multiplied values of signals in which a predetermined time waveform is multiplied with said carriers and said sampling signal, means for detecting changes of phases of said complex conjugate multiplied values at every carrier during a predetermined period, means for detecting differences of phase changes detected at every carrier as phase difference signals, and means for detecting reception data on the basis of detected phase difference signals.