JPS63315964A - Phase tracking type receiver - Google Patents

Abstract

PURPOSE:To continuously and simultaneously measure a relative frequency deviation value of many measured frequencies and a standard radio wave frequency, by scanning successively a measured frequency input signal, and also, storing a result of measurement in a storage device. CONSTITUTION:A standard radio wave 1a from an antenna 2 is inputted to a phase comparator 7 through a high frequency amplifier 3, a mixer 4, and an intermediate frequency amplifier 6, and its phase to a frequency to be measured is compared. Subsequently, in proportion to a phase difference signal 7a, a measured frequency signal 11a is shifted in phase by a phase shifter 8, and inputted to a synchronous detector 9 for controlling an amplification degree of an intermediate frequency amplifier 6, and a local oscillator 5. On the other hand, in a dispersion processing circuit B, one wave is selected by a switch 10 for selecting the measured frequency signal, and also, one wave which is selected is sent out to a processor 11. Subsequently, a phase-shifting quantity signal corresponding to the measured frequency signal is sent out to memories 12b-12d corresponding to each frequency.

Description

Detailed Description of the Invention (Prior to Industrial Use) The present invention is based on the relative relationship between the measured frequency of a large number of oscillation circuits and the standard radio wave frequency using a standard radio wave based on a cesium frequency standard as a frequency source. The present invention relates to a phase tracking type bone A, C device that is capable of measuring frequency deviation (lI'1) temporally continuously and at the same time at a plurality of frequencies to be measured.

(Prior technology) Each persimmon's oscillation circuit or oscillator uses a standard radio wave based on a cesium frequency standard, etc. as a prototype, which is emitted based on the International Telecommunications Treaty Radio Communication Regulations (1) Regulations, as a frequency source. The phase tracking type receiver Li device that performs the radio communication receives standard radio waves and
Compare the Ig frequency loss and the measured frequency and phase shift the difference.
i) to determine the relative frequency deviation value.

FIG. 2 shows a conventional phase tracking type receiver, which includes an antenna 41 that receives a standard radio wave 40a, a high frequency amplification circuit 42 that amplifies the standard radio wave 40a from the antenna 41, and a high frequency amplification circuit 42 that amplifies the standard radio wave 40a from the antenna 41. A mixing circuit 43 that converts the radio wave to l/integer of the frequency to be measured 40b, a local oscillation circuit 44 that sends (+?"J to the mixing circuit 43 for converting the radio wave to 4:3, and a local oscillation circuit An intermediate frequency amplifier 45 that amplifies the intermediate frequency converted by 44 and produces a reference No. 1, a phase comparator 46 that compares the phase of the reference No. 100 4c and the frequency to be measured 46, and a zero phase comparison. The phase difference from the phase shifter 46 (+M +,'j40 (1), which shifts the phase in proportion to The synchronization detection circuit 48 controls the amplification degree of the intermediate frequency amplifier 45 based on the detection of synchronization (+? It has a D/A converter 49 that moves.

However, the conventional phase tracking type receiver is only capable of measuring one frequency, and cannot simultaneously measure the relative frequency deviation (+I'f) of multiple oscillation circuits.

(9, [1] of Ming) The present invention has been made in view of 1-, and 2 and above 1-
1. To the measured frequencies and targets of a large number of oscillation circuits. It is an object of the present invention to provide a phase tracking receiver capable of measuring deviation values of frequencies relative to radio waves continuously in time and simultaneously measuring a plurality of frequencies to be measured.

(Summary of the Invention [In order to achieve the first object, the phase tracking type receiver of the present invention has a phase tracking type receiver having a conventional configuration. A switching device for sequential scanning is provided, and the measurement results for each frequency signal to be measured are stored in a storage device provided corresponding to the input channel of the frequency signal to be measured, and the contents of the memory are stored in a digital-to-analog converter. In addition, in order to shorten the synchronization time to each signal when measuring ?i! number of frequencies to be measured continuously in a time-division manner, it is configured to output to a desired device via The period during which is measured is the phase shift of the relative frequency deviation value of +37+;
is recalled from memory and the value is compared with standard radio waves by 1+1. Since these series of operations are performed for all of the plurality of frequencies to be measured, it is possible to continuously and simultaneously produce the phase shift τ11 of the relative frequency deviation value.

(Embodiments) Hereinafter, the phase tracking receiver 11 device of the present invention will be described in detail.

FIG. 1 (al is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 1 (bl) schematically shows the locus of the relative frequency deviation value measured by the phase tracking receiver 11 device of the present invention. FIG.

The phase tracking type receiving device of the present invention receives a standard radio wave and produces a phase-tracked signal (demodulated signal output), and also has a receiver Δ that inputs an external reference signal and switches the input of a large number of signal frequencies to be measured. It also includes a phase shifter between the input frequency to be measured and a standard radio wave frequency, that is, a distributed processing circuit 13 that generates a relative frequency deviation value.

Receiver A, 1 aircraft A, has antenna 2 that receives standard radio wave 1a,
A high frequency amplifier 3 band-limits and amplifies the standard radio wave 1a from the antenna 2;
``A mixer 4 that converts the same frequency as the third frequency, a local oscillator 5 that supplies a local signal to the mixer 4, and amplifies the converted intermediate frequency 48 and sends out the J! The reference intermediate frequency amplifier 6, etc. 1) 6a
A phase comparator 7 that compares the phase of the frequency signal Sj and the frequency to be measured; 8, and the intermediate frequency amplifier 6 using the phase-shifted frequency to be measured 8a and the intermediate wave amplifier output signal 6a based on the IYI reference.
Synchronous detection 27I that creates belief 9a that controls the amplification of
9.

The distributed processing circuit B receives the input frequency signal under measurement lOb.
, foe, and IOd, and the selected frequency signal to be measured 11a is inputted to the phase shifter 1tj, and the phase shift 1,1 for this signal and the reference signal 6a is inputted from the phase shifter 8. and the frequency signals to be measured 10b, loc, lo
A processor 11 that outputs to a memory linked to d, and a processor I
The measured frequency signal 'rj l Ob , l
Oc, l Phase shift corresponding to Od: 11,: 12b, +2c, 12d, and people's memory 1
[)/A converters 13b, 13c, +3 connected to 2b, 12c, 12d to operate an external analog recorder, etc.
It is composed of d.

In the above configuration, standard radio wave 1a is sent to the receiver.
The reference signal 6a created based on the measured frequency signal 1
Signal with one wave selected from 0b, IOc, IOd+1
a is input to the phase shifter 8 and phase-shifted, and a phase shift comparison is performed by the phase shift comparator 7, and one input signal selected from among the measured frequency signal "r'F10b, loc, and IOd for the standard radio wave" is input. Phase shift with 3slla: , 1, that is, the relative frequency deviation value 8b to total 8 (produces 1).

In the distributed processing circuit B, the switch 10 for selecting the frequency to be measured No. 1.1 selects one wave, and the selected one
The waves are sent to the processor 11. Signal 8 from phase shifter 8
b is the phase shift fitLt incremented by 5 corresponding to the signal selected from the measured frequency Gi, 10b, 10c, and lOd.
The processor 11, which recognizes whether each frequency is completely different, stores one in the memory corresponding to each frequency.
111 Phase shift::k (Sends +4. For example, when the frequency signal under test -310b is selected, the phase shift +It 8b is sent to the frequency signal under test 12b.
The phase shift FJ 8 b of Oc is sent to the memory 12C, and the phase shift jjt 8 b of 1 is sent to the memory 12d.
When the Li+1a selected by the switch 10 is input to the phase shifter 8, the 1ri measured value of (relative frequency deviation value) is applied to the phase shift of the selected frequency signal to be measured with respect to the reference signal 6a. It reads out from the memories 12b, 12c, and 12d corresponding to the selected frequency signal to be measured (-) and sends it to the phase shifter 8.

Through these series of operations, the synchronous detector 9 and the phase comparator 7 simultaneously switch the selection of the frequency signal to be measured and the reference signal 6a.
The phase is tracked and a phase shift 'it (relative frequency deviation value) is created.

Figure 1 fbl shows the locus that appears on the recorder based on the relative frequency deviation values obtained from the series of operations described above. It shows the time during which the frequency signal under test is being measured, and clearly indicates that continuous measurements can be made by tracking the phase shift at the same time as switching to another frequency signal under test.

Note that in the distributed processing circuit 13, an RL wave is used as the frequency signal to be measured, but as the number of frequency signals to be measured 5) increases, memory and D/A converters can be added to accommodate a large number of signals. Measurement of the frequency signal to be measured becomes i4 function. By doing so, it becomes possible to continuously and simultaneously measure the relative frequency deviation value between the frequency to be measured of a large number of oscillation circuits and the standard radio wave frequency.

(Effects of the Invention) As described above, according to the phase tracking type receiver of the present invention, it is possible to measure the frequency signals to be measured from a large number of oscillation circuits, and therefore the measurement time can be shortened.

[Brief explanation of drawings]

FIG. 1(rl) is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 1(b) schematically shows the trajectory of the relative frequency deviation value measured by the phase tracking receiver of the present invention. The explanatory diagram shown in FIG. 2 is a block diagram of a conventional phase tracking receiver. A...Receive+, as a machine [3...Distributed processing circuit 1a
... Standard radio wave 2 ... Antenna: 3 ... High frequency amplifier 4 ... Mixer 5 ... Local oscillator 6 ... Intermediate frequency amplifier 7 ... Phase comparator 8 ... Phase shifter 9...Synchronous detector 10...Switcher +1--Processor 12b, 12c, 12d--Meridor l 3b,
I 3c, I: 3d ... D/A converter patent applicant Toyo Tsushinki Co., Ltd. Agent Hitoshi Suzuki Figure 1 (b) Relative frequency deviation value

Claims (2)

[Claims] (1) A phase tracking receiver that tracks and compares the phase of the received standard radio wave and the input frequency to be measured and generates a relative frequency deviation value; 1. A phase tracking type receiving device comprising: a disperser that individually discriminates frequencies to be measured and produces a relative frequency deviation value. (2) The disperser includes a switch that selectively switches the plurality of frequencies to be measured and sends the selected frequency to be measured to the phase tracking type receiver, and inputs the amount of phase shift of the relative frequency deviation value. a processor for selectively discriminating and transmitting a frequency to be measured, a memory for storing the amount of phase shift of one frequency to be measured that has been discriminated and transmitted; and a device for displaying the amount of phase shift for the frequency to be measured in the memory. and a D/A converter that generates a signal, and the memory and the D/A converter constitute one set, and each set is provided in the same number as the plurality of frequencies to be measured, and each set is arranged in the same number as the plurality of frequencies to be measured. The phase shift amount of the relative frequency deviation value corresponding to each is created, and the measured frequency whose phase shift amount of the relative frequency deviation value is measured is the phase shift of the previous relative frequency deviation value while the other measured frequency is being measured. transmitting a quantity from the memory through the processor to the phase tracking receiver;
2. The phase tracking receiving device according to claim 1, wherein the measurement is restarted based on the immediately previous phase amount.