US 5,708,684 AGranted

Radio equipment

AssigneeFujitsu Limited

InventorYoichi Ueda

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Abstract

A high-frequency signal output from an active radio transmitter is input to a phase comparator via a standby radio receiver. A transmitting data processing unit delays a frame data signal and a clock signal by a predetermined time and inputs them to the phase comparator. The phase comparator compares the phases of the two frame data signals and the two clock signals, and the delay time adjuster in the active radio transmitter adjusts the phases of the frame data signal and the clock signal input from the data processing unit so that the phases of both data signals and clock signals are coincident with each other. Similarly, the delay time adjuster in the standby radio transmitter adjusts the phases of the data signal and the clock signal input from the data processing unit. In this manner, the delay times (signal phases) of the active radio transmitter and the standby radio transmitter are automatically adjusted during the operation of a radio equipment.

Claims6

Dependent claims

A radio equipment having an active radio transmitter and a standby radio transmitter, and an active radio receiver and a standby radio receiver, wherein the difference in the delay time between said active radio transmitter and said standby radio transmitter is zero, said equipment comprising:

a transmitting data processing unit for assembling input data in the form of a frame and inputting a clock signal and a frame data signal to each of said active radio transmitter and said standby radio transmitter;
a high-frequency signal switch for selecting and outputting a high-frequency signal output from said active radio transmitter;
a transmitting and receiving portion for transmitting said high-frequency signal output from said high-frequency signal switch to other radio equipment and receiving a high-frequency signal which is transmitted from the other radio equipment and inputting said high-frequency signal to said active radio receiver and said standby radio receiver;
a received data processing unit for receiving a frame data signal and a clock signal demodulated by each of said active radio receiver and said standby radio receiver and deframing and outputting a frame data signal supplied from said active radio receiver;
a signal route generator for selecting said high-frequency signal output from each of said active radio transmitter and said standby radio transmitter and inputting said high-frequency signal to said standby radio receiver so as to generate a signal route for adjusting the delay time of the corresponding radio transmitter;
a means provided in said transmitting data processing unit so as to supply said frame data signal and said clock signal to said received data processing unit after a predetermined delay;
a phase comparator provided in said received data processing unit so as to compare the phases of a frame data signal and a clock signal which are received from said standby radio receiver with the phases of said frame data signal and said clock signal which are directly received from the transmitting data processing unit, and to output signals indicating the coincidence/discordance of a data phase and the coincidence/discordance of a clock phase, respectively;
and
a delay time adjuster provided in each of said active radio transmitter and said standby radio transmitter so as to adjust the phases of said frame data signal and said clock signal input from said transmitting data processing unit so that both the phases of the two clock signals and the phases of the two frame data signals input to said phase comparator are coincident with each other.

6 more elements

A radio equipment having an active radio transmitter and a standby radio transmitter each provided with a modulator and a transmitter, and an active radio receiver and a standby radio receiver, wherein the difference in the delay time between said active radio transmitter and said standby radio transmitter is zero, said equipment comprising:

a transmitting data processing unit for assembling input data in the form of a frame and inputting a clock signal and a frame data signal to each of said active radio transmitter and said standby radio transmitter;
a high-frequency signal switch for selecting and outputting a high-frequency signal output from said active radio transmitter;
a transmitting and receiving portion for transmitting said high-frequency signal output from said high-frequency signal switch to other radio equipment and receiving a high-frequency signal which is transmitted from the other radio equipment and inputting said high-frequency signal to said active radio receiver and said standby radio receiver;
a received data processing unit for receiving a frame data signal and a clock signal demodulated by each of said active radio receiver and said standby radio receiver and deframing and outputting a frame data signal supplied from said active radio receiver;
a signal route generator for selecting a signal output from said modulator of one of said active radio transmitter and said standby radio transmitter and inputting said signal to a demodulator of said standby radio receiver so as to generate a signal route for adjusting the delay time of the corresponding radio transmitter;
a branching circuit provided in each of said active radio transmitter and said standby radio transmitter so as to distribute said signal output from said modulator to said transmitter and said signal route generator;
a means provided in said transmitting data processing unit so as to supply said frame data signal and said clock signal to said received data processing unit after a predetermined delay;
a phase comparator provided in said received data processing unit so as to compare the phases of a frame data signal and a clock signal which are received from said standby radio receiver with the phases of said frame data signal and said clock signal which are directly received from the transmitting data processing unit, and to output signals indicating the coincidence/discordance of the data phase and the coincidence/discordance of the clock phase, respectively;
and
a delay time adjuster provided in said modulator of each of said active radio transmitter and said standby radio transmitter so as to adjust the phases of said frame data signal and said clock signal input from said transmitting data processing unit so that both the phases of the two clock signals and the phases of the two frame data signals input to said phase comparator are coincident with each other.

7 more elements

Dependencies are inferred from the claim text.