Patent ID: 7120397
Filing Date: 2006-10-10
Classification: H03D,H04B

Abstract:
1. An SSB radio communication system comprising: amplitude modulating a carrier wave in a transmitting side by using modulation inputs, wherein the modulation inputs comprise a constant amplitude, sine wave shaped reference pulse signal having a predetermined width and period, and sine wave shaped modulation pulse signals having the same width as the reference pulse signal and amplitudes representing two- or multi-value digital values based on the amplitude of the reference pulse signal, transmitting the amplitude modulated signals on a single side band, and automatically adjusting gains of received signals in a receiving side which are values of peaks of the received signals based on the reference pulse signal, wherein forming the period or frequency of said reference pulse signal in the transmitting side in synchronism with the carrier wave frequency, and determining a local carrier frequency in the receiving side, based on the period or frequency of said reference pulse signal, wherein said reference pulse signal is formed such that the reference pulse signal is provided with a predetermined width and a predetermined period based on said carrier wave frequency of the transmitting side.