| 摘要 |
PURPOSE: A mobile communication system capable of compensating time delay is provided to correct time delay generated from manufacturing process and a change of external surroundings by measuring delay time in real time in transmitting communication signals and compensating and transmitting this measured delay time. CONSTITUTION: A mobile communication system capable of compensating time delay consists of a central node unit(100) and a remote node unit(200). The central node unit(100) is comprised of a forward communication signal processing part(110), the second delay time control part(120), a backward mixed signal processing part(130). The remote node unit(200) is comprised of a forward mixed signal processing part(210), the first delay time operation part(220), and a backward communication signal processing part(230). The forward communication signal processing part(110), receiving a forward communication signal from a base station, mixes a main reference clock, supplied from a satellite, with the forward communication signal. Also the forward communication signal processing part(110) delays the output of the forward mixed signal to compensate the second delay time under the control of the second delay time control part(120). The backward mixed signal processing part(130) detects the second delay time from a backward mixed signal transmitted through a backward transmission line and supplies it to the second delay time control part(120). The second delay time control part(120) compares the second delay time of the backward mixed signal processing part(130) with the reference clock and calculates the first delay time as delay time in transmitting the forward communication signal and the backward communication signal. The forward mixed signal processing part(210) distributes a forward mixed signal transmitted through a forward transmission line, transmits the distributed forward mixed signal through an antenna, and detects a distributed main reference clock. The first delay time operation part(220) compares the main reference clock of the forward mixed signal processing part(210) with a sub reference clock corresponding to the current time supplied from the satellite and calculates the first delay time as delay time in the transmission of the forward transmission line. The backward communication signal processing part(230), receiving the first delay time data, processes a forward communication signal received through the antenna, mixes the processed backward communication signal with the first delay time data and outputs a backward mixed signal.
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