SU606221A1 - Carrier frequency synchronizer - Google Patents

Description

one

The image is related to radio engineering and can be used in coherent reception devices of phase-shifted signals.

A known carrier synchronizer, containing a closely connected multiply clip, a symbol receiver and a controlled oscillator, combined at the input with a multiplier l 3

However, this device is characterized by the fact that n {a randomly jumping phase of the generator controlled by voltage c will be reversed, which leads to a deterioration in the reliability of signal reception.

The circuit of the invention is to improve the accuracy of synchronization of the signals of the frequency frequency.

To do this, a clock carrier synchronizer containing serially connected permixers, a receiver of symbols and a controlled oscillator, combined at the input with a multiplier, the output of the controlled oscillator and another multiplier input, includes a phase synchronization and control unit, the other inputs of which are connected to the output of the symbol receiver and the input of the multiplier, in addition, the phase phase matching and matching unit consists of the first co-coincidence first connected, the phase detector, the first A decelerator, trigger and phase shifter, the other input of which is connected to another input of the phase detector, the output of the decisive output through the second delay unit connected in series and the strobe impuser formatter connected to the input of the first coincidence unit, and through the second descaling unit to another input trigger, while another output of the second delay unit is connected to another input of the second coincidence unit, with other inputs of the phase shifter, phase detector, coincidence unit and input of the decision unit, as well as phase output The controller and the decision block are the corresponding inputs and outputs of the control and phase matching block.

Claims (2)

The drawing shows a structural electrical circuit of the proposed device. . . The carrier synchronizer contains serially connected multiplier 1, receiver 2 CHMBonoD and controlled oscillator 3, combined at the input with the multiplier 1, and each output of the controlled oscillator 3 by another input of the multiplier 1, the control unit 4 is set and the phase is set with nx | which is connected to the fork of the receiver 2 simools and the input of the transninkoste 1. The control unit 4 in the phase synchro shema phase setup consists of the first consecutively first unit 5 of the phase 5 and the CSO of the detector. 6, of the first block 7 of the delay g | I1gger 3 and faeow1-1 Q, another input koTOporo is connected to another phase detector 6, and the output of the unit Yu through the axis of the second bioc 11 is delayed and forms a flow pattern that draws the interface The first first match skip 5, and the turn of the second block 13 of the match to another trigger code S, 8 (This is the right | output of the first block 11 deceleration s in the gate of the second @ 9osa 13 joint, and the other)) Ш 0, phase detector (, 0ка 5 soaavdensh and input of decisive BP (Ms 1O, as well as outputs of the phase converter The device 9 and the decisive block iO of the PCs are compatible with the cones of the block 4 of the control and phase synchronization installation. The device works in the following way. The input of the faomanipole signal is fed to one multiplier 1 input, and the control generator 3 goes to another input phase shifter 9; The output of the rover is 1, if the input signals coincide with this, and -I, if the input signals are out of phase. A receiver 2 si of oxen with a single signal affects the controlled oscillator 3 and the decisive 6nos system of cyclic sync; L low. The decisive block 1O spoils the alarm in the absence of a frame alignment signal. The absence of a frame synchronization signal over several successive cycles indicates that a sporase phase jump occurred, resulting in reverse operation. The alarm signal from the decision block 10 goes to one input of the second block 13 of the protection path coincidence directly, and to another its input goes through the second delay block 11, which provides a delay for the cycle time (Tc) for which the phase matching is monitored. At the same time, the input signal through the first block, 3 coincidences, opened by the strobe pulse from the output of the strobe pulse formation 12, is fed to one input of the phase detector 6, to the second input of which a signal is output from the output of the controlled generator 3. If the signals coincide in phase, then the phase detector 6 through the first delay block 7, the output voltage keeps the trigger 8 in the initial state, and the alarm signal from the decision block 10 through the second match block 13 does not affect the phase-rotation gel 9. Therefore, the entry path prevents false phase shucking in case of no return} work. IF the phases of the input signals of phase detector 6 do not coincide, the output signal of phase detector 6 overturns trigger 8, and phase shifter 9 changes the phase of oscillations from the control output. generator, torus 3 on Ut radians. The formula was also invented by the 1. Carrier synchronizer qacKJtfci, containing the series-connected multiplier, the mercenary of symbols, and an awesome generator combined up to the x with the telegram | ex; In order to synchronize the accuracy of synchronization of the carrier frequency between the output of the controlled oscillator and the other input, multiply the phase and phase matching unit, the other inputs of which are connected to the output of the symbol receiver and the input of the multiplier. 2. Synchronizer p. 1, characterized in that. The phase synchronization monitoring and control unit consists of the first matching match in series,: a phase detector, a first delay unit, a trigger and a phase shifter, another input of which is connected to another input of the phase selector g, and the output of the decision unit through the second delay unit and the driver the strobe pulses are connected to the nepBWo input of the matching unit, and through the second matching unit to the other input of the trigger, while the other output of the second delay is connected to another input of the second A matching unit, with the other inputs of the phase shifter of the phase detector, the matching unit block, the input of the decision block, and the output of the phase shifter and the decision block are the corresponding inputs and outputs of the control and phase matching unit. Sources of information taken into account in the examination :, 1. J.J. Stiffler .Teoptx synchronous communication, M., Sw.,, S, 243 44.