SU832506A1 - Receiving indicator - Google Patents

Description

(54) RECEIVER

one

The invention relates to radar and can be used in pulse-phase radionavigation systems to locate objects.

Known receiver indicator containing an antenna connected to the receiver input, the output of which is connected to the first input of the processing unit — information, the inputs of which are connected to the synchronizer outputs, the first information processing unit is connected to the inputs of the tracking blocks, the outputs of which are connected to the corresponding synchronizer inputs, the second output of the block processing unit is connected to the first input of the control and display unit, the second input of which is connected to the output of the reference generator and the first inputs of the difference meters therefore, the output of the control and display unit is connected to the corresponding inputs of the information processing unit of the syihro "isolator of time difference meters, the outputs of the latter; connected to the additional inputs of the control and display unit, and the corresponding BXQQH to the corresponding outputs of the synchronizer ll.

 . 2

However, the known indicator has a lack of accuracy in determining the hyperbolic coordinates of the location of objects.

The purpose of the invention is to improve the accuracy of determining hyperbolic coordinates.

 The goal is achieved by the fact that, in the receiver indicator, the contents

an antenna connected to the receiver input, the output of which is connected to the first input of the information processing unit, the other inputs of which are connected to the outputs of the synchronizer, the first;

the output of the information processing unit is connected to the input of tracking units, the outputs of which are connected to the corresponding inputs of the synchronizer, the second output of the information processing unit is connected to the first input of the control and display unit, the second input is connected to the output of the reference generator and the first inputs of time difference meters,

the output of the control and indication unit is connected to the corresponding inputs of the information processing unit, the synchronizer and time difference meters, the outputs of the latter are connected to

Claims (1)

The additional inputs of the control and display unit, and the corresponding inputs with the corresponding outputs of the synchronizer, a correction unit for measured hyperbolic coordinates and a storage correction unit for measured hyperbolic coordinates, the first inputs of which are connected to the output of the control and display unit, the second inputs with an additional output the first of the tracking blocks, and the third inputs of the correction blocks stored measured hyperbolic coordinates are connected to the additional outputs of the remaining tracking blocks, the output is b To correct the measured hyperbolic coordinates, it is connected to the first additional inputs of the time difference meters, the second additional inputs of which are connected to the outputs of the corresponding storage correction blocks of the measured hyperbolic coordinates. FIG. Figure 1 shows the structural electrical circuit of the proposed receiver; Fig. 2 shows time diagrams explaining its operation. The primed indicator contains receiver 1 with antenna, information processing block 2, synchronizer 3, tracking blocks 4, control and display block 5, reference generator 6, time difference meters 7 , block 8 for correction of measured hyperbolic coordinates and blocks 9 for correcting storage of measured hyperbolic coordinates, the Primary indicator works as follows. After switching on the receiver indicator, the system searches for signals from the master and slave stations of the system based on the results of sampling information processing unit 2, by collecting gates generated by the synchronizer l 3, at the command of the control and display unit 5. After the search for the signals of the stations of the Pririem system is completed, the indicator switches to the mode of tracking the signals of these stations with the help of blocks of 4 tracking. synchronizer 3 in position and velocity so that these probes are at selected signal points for measurement. After the end of the transition process in blocks 4, the control and display unit 5 transfers the Primary indicator to the measurement mode. In the measurement mode, in each period of the system station (TC) signals, the time difference meters 7 count the number of pulses from the reference generator b filling intervals of the time of arrival of the signal from the master station (A) to the time of arrival of the signals corresponding to the center of the slave station (B or B of Fig. 2, ay. The pulse period of the reference oscillator 6 determines the instrumental accuracy L with which The hyperbolic coordinates of TGd 5 and Gd are measured (Fig. 2, a). The measured values and the CAB are stored in the meters 7 of the time difference in, for the time Tj, for issuing consumers {to the light indication, to the computing complex and t, d) When switching to measurement mode by a command from block 5, the operation of block 8 for correction of measured hyperbolic coordinates and storage correction blocks 9 and meters 7 for time difference is resolved. The time difference meters 7 count the number of pulses from the reference generator 6 at the respective time intervals from -t to i for TdB and from toi to i, for Cgdz (Figs. 26, c). At the same time, the first additional inputs of the time difference meters 7 can receive signals from the measurement correction unit 8. These signals occur whenever the condition (.n, where (O Sdr is for the first hyperbolic coordinate, {O - Gdr - for the second hyperbolic coordinate, n 1,2,3,., Л) is the instrumental accuracy Under the action of the velocity correction signals, the measured value of the hyperbolic coordinates changes by the value of D, the sign of which determines the sign of Vd, the value of the value of Od arrives at block 8 from the additional output of the corresponding tracking block 4. At the second additional input of the 7 time difference meters from the corresponding block Correction signals may receive hyperbolic coordinate correction signals at 9. Correction signals occur when the conditions / VA-Vg / t .- - NR or p. V --- - where t OtTc are met, respectively. the stored value of the hyperbolic coordinates changes to, the sign of which depends on the sign of the values of Ud-Ur and UD-UV, respectively. To check the correction conditions, the storage correction blocks 9 are connected to the additional outputs of the corresponding tracking blocks 4. Thus, Lasing in the receiver of the measurement correction unit and the storage correction unit increases the accuracy of determining the hyperbolic coordinates. It is assumed that the mobile object moves along the base of the battery at a speed of 1 km / s UA-UB, 0.1 sec., ZTAis: 0.03 sec. Then the measurement error in the receiver of the U.S. Patent is ± 10 ° C OW. WKC. The maximum storage error will be the value (CO, 67-fdbsci67 for me.) For most modern receivers, the instrumentation is L 0.1 MKS. (244), therefore the occurrence of such errors unacceptable In the proposed receiver, the measurement correction block 8 will generate one correction signal during the measurement, since lM M - JL5 i- I. VC-A 3-10; 0, IO As a result, the measurement error is 5i-D Abi- 0: the corresponding block 9 of the storage correction during storage T produces six correction signals, t To as / UA-HC / TH Vc 3-105-O, -10 Therefore, the storage error in this case .--, l A5x D A6x6-D- 5. Thus, in the proposed indicator of errors, the error does not exceed the instrumental accuracy. It is obvious that the essence of the proposed invention does not change with an increase in the number of stations in the system and an increase in the astatism of the following systems: Claims of the invention A receiving indicator containing an antenna connected to the receiver input, the output of which is connected to the first input of the information processing unit, other inputs which are connected on the sync outputs Ator, the first output of the information processing unit is connected to the inputs of the tracking units, the outputs of which are connected to the corresponding synchronizer inputs, the second output of the information processing unit is connected to the primary input of the control and display unit, the second input of which is connected to the output of the reference generator and the first inputs of time difference meters , the output of the control and indication unit is connected to the corresponding inputs of the information processing unit, the synchronizer and time difference meters, the outputs of the latter are connected to the additional inputs of the control and indication unit, and the corresponding inputs - with the corresponding--; Synchronizer outputs, characterized in that, in order to improve the accuracy of determining hyperbolic coordinates, a block for correcting measured hyperbolic coordinates is introduced. Correction blocks for measured hyperbolic coordinates are added, the first inputs of which are connected to the output of the control and indicadia, the second inputs are with an additional output first of blo. tracking, and the third inputs of the storage of measured hyperbolic coordinates correction blocks are connected to additional outputs of the remaining tracking blocks, the output of the measured hyperbolic coordinates correction block is connected to the first additional inputs of time difference meters, the second additional inputs of which are measured by the measured hyperbolic coordinates . Sources of information, taken into account in the examination 1. US Patent 33-75520,. cl. 343-103, 1970 Sprotip).