SU627420A1 - Radio signal phase measuring arrangement - Google Patents

Description

The invention relates to a device for accurate measurement of the phase of a radio signal can be used at receiving points of navigation systems and a single time for measuring the phase of pulsed and non-continuous radio signals.

It is known a device for anchoring the time scale by the pulse signals of the system / 1oran-C. The essence of this device is capturing the provision of phase measurements of the fixed part of the high-frequency siphoning of a radio pulse determined by its characteristic point.

The drawbacks of such a device are strict requirements for the nature of the received signals (radio pulses of a certain shape) and the impossibility of accurately measuring the phase of other frequencies of high-frequency filling. In addition, it is designed to measure the phase of short-duration radio pulses. The scheme of such a device is very complicated.

It is also known a device for measuring the phase of radio signals, adopted as a prototype. Intended to measure

phases of reference radio signals, including long-duration radio pulses. It contains a radio receiver, a phase meter, a reference frequency generator, a reference clock phase keeper (time keeper), a piloting unit, a control and switching unit.

However, the possibility of using a preselected carrier period for measurements reduces the accuracy of phase measurements in the case of an irregular phase measurement, for example, in the case of modulated radio signals, due to the non-identity of the periods used for measurements due to transient effects.

The purpose of the invention is to improve the accuracy of phase measurements jio radio signals.

Claims (2)

According to the proposal, this goal is achieved by the fact that a device for measuring the phase of radio signals, containing a series-connected reference frequency generator, time saver, piloting unit, switching unit, radio receiver, the second input of which is connected to the output of the reference frequency generator, and a phase meter, a time selection node connected by its inputs to a switching unit, a radio receiver and a time keeper, and the outputs to a switching unit and a time delay unit switched on between for a time keeper and a phase meter, Uzep time selection contains a series-connected additional radio receiver, an anchor block, a gating cascade and a mixer; the additional radio receiver, the gating cascade and the mixer are connected to the switching unit, the second mixer input is connected to the output of the additional radio receiver, the tie-in unit is connected to the radio receiver, the variable delay unit and the time keeper connected also to the gating cascade. FIG. 1 and 2 shows the functional diagrams of the device as a whole and the node of the time selection. The device contains a radio receiver 1 phase meter 2, a reference frequency generator 3 time keeper 4, piloting unit 5, switching unit 6. Time selection node 7 contains a variable delay unit 8, additional radio receiver 9, mixer 10, lock-and-hold loop, strobe cascade 12. Works The device is as follows. In the signal received by the radio receiver 9 by means of block 11 and gating cascade 12, a fixed period of high-frequency filling (part of a period or several periods) used in mixer 1O is used to transfer the signal spectrum to the range in which it can be received by radio receiver 1. Block variable delay 8 selects the required delay value of the reference signal, and also generates a command for changing the sampling frequency from the input signal and the capacitance of the counters-integrator of the phase meter 2. Since the output signal is a radio receiver and 1 has a significant delay in relation to the true time of its formation, determined by the frequency range of the radio receiver and its bandwidth, the reference signals of the phase meter 2 are also delayed with the unit's power to provide synchronous and in-phase samples for subsequent accumulation and measurement of the radio signal phase. In addition to improving the accuracy of phase measurements, the present invention allows a significant reduction in the total amount of equipment used in dp measurements based on DV and DLV radio stations. 1. An apparatus for measuring the phase of radio signals, comprising a series-connected frequency onopHoEl generator, a time keeper, a piloting unit, a switching unit, a radio receiver, the second input of which is connected to the output of the reference frequency generator, and in order to improve the accuracy measurements, it introduced a variable delay unit and a time selection node connected by its inputs to a switching unit, a radio receiver and a time keeper, and inputs to a switching unit and a unit in Yemen delays included between timekeeper and a phase meter. 2. A device according to claim 1, characterized in that the time selection node comprises a series-connected additional radio receiver, an anchor block, a gating cascade and a mixer, the additional radio receiver, a gating cascade and a mixer are connected to the switching unit, the second mixer input is connected to the output an additional radio receiver, an anchor block is connected to the radio receiver, a variable delay unit, and a time keeper, also connected to the gate cascade. to Ulvkub from block 4 .-- b-t Walokab from 1 to 1 kulak