SU1573538A1 - Device for automatic analysis of operating frequencies - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the reliability of the analysis of operating frequencies. The device contains an antenna switch 1, a radio receiver 2, a filter block 3, an analysis block 4, a frequency selection block 5, a RAM block 6, a control block 7 (CU), a frequency occupancy block 8, an initial data storage block 9 and a block 10 frequency rejection. The device operates in a sequential analysis mode of frequencies assigned to a given radio direction. The goal is achieved by introducing block 10, in which the ratings of the operating frequency and the highest frequency are compared first, and then the operating frequency and the lowest frequency, i.e. sequential comparison of the ratings is made. If the nominal operating frequency is greater than the highest frequency or the lowest frequency, then the frequency is rejected and the control unit 7 transfers the radio receiver 2 to the next frequency. If the nominal operating frequency is less than the highest frequency and greater than or equal to the lowest frequency, then after completion of the analysis from block 10 in the CU 7, a signal is issued about the frequency suitability under the propagation conditions. 4 hp ff, 5 ill.

Description

one

(21) 4252475 / 24-09

(22) 05/27/87

(46) 06.23.90. Bksh. № 23 (72) V.A. Zarubin, A.Yu.Lapin, V, B.Soroka, V.G. Utenkov and B.V. Begak

(53) 621.396.669 (088.8)

(56) USSR author's certificate

No. 1501284, cl. H 04 B 1/10, 05/13/87.

(54) DEVICE FOR AUTOMATIC ANALYSIS OF OPERATING FREQUENCIES

(57) The invention relates to radio engineering. The purpose of the invention is to increase the reliability of the analysis of operating frequencies. The device contains an antenna switch 1, a radio receiver 2, a filter unit 3, an analysis unit 4, a frequency selection unit 5, a RAM unit 6, a control unit (CU) 7, a block 8 frequency detection, block 9

source data storage and frequency rejection unit 10. The device operates in the mode of PB-serial analysis of frequencies assigned to this radio direction. The goal is achieved by introducing block 10, in which the ratings of the operating frequency and the highest frequency are compared first, and then the operating frequency and the lowest frequency, i.e. a successive comparison of t nominal values is made. If the nominal frequency of the operating frequency is greater than the highest or lowest frequency, then the frequency is rejected and the control unit 7 switches the radio receiver 2 to the next frequency. If the nominal operating frequency is less than the highest frequency and greater than or equal to the lowest frequency, then after completion of the analysis from block 10 in the CU 7, a signal is issued about the frequency suitability under the propagation conditions, t 4 h. p, f-ly, 5 silt,

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31573538

 The invention relates to radio engineering and can be used at receiving radio centers for automatic selection of receiving frequencies suitable for communication in the HF band.

The aim of the invention is to increase the reliability of the analysis.

Fig. 1 shows a structural electrical circuit of an automatic analysis of operating frequencies; FIG. 2 is a structural electrical c) seme of the control unit; FIG. 3 is a structural electrical block diagram.

ten

Frequency rejection unit 10 contains a reference element 48, the first 49 and the second 50 triggers, the inverter 51 and the And element 52,

The device works as follows.

Before starting work, blocks 9–47 of block 9 memory are recorded, respectively, antenna numbers, filter numbers, interference thresholds, frequency ratings, highest frequencies, lowest frequencies, and numbers

frequencies allocated for each radio | 1 frequency selection; in Fig. 4, the structure is 5 directions. Recording the specified information on the electrical circuit of the source data storage unit; Fig. 5 is a structural electrical circuit of a frequency rejection unit.

The device contains a follower20

The device is produced from an input device, which in FIG. 1 not shown.

When a request (command) is received to select and issue the optimal operating frequency for a given radio direction, which can be received automatically or through radio operators operating the corresponding communication line, a signal is received at the input of the input

but connected antenna switch 1, radio receiver 2, filter block 3, analysis block 4, frequency selection block 5 and random access memory block 6, and

control block 7, block 8 of determining 25 initial data of control block 7

 35

frequency block, Source data storage unit 9 and Frequency rejection unit Yu,

The control unit 7 comprises a memory unit 11, first triggers 12, first Element OR 13, second decoder 14, first driver 15 pulses, second element OR 16, first shift register 17, first decoder 18, second trigger 19, pulse generator 20, second shift register 21, the first element AND 22, the third element OR 23, the Third trigger 24, the fifth element OR 25, the second 26 and the third 27 pulse shapers, the inverter 28, the second element AND 29 and the fourth element OR 30.

The frequency selection unit 5 comprises a first register 31. a memory, a delay element 32, an inverter 33, a first 34 and a second 35 triggers, an OR element 36, a first 37 and a second And 38 elements, a second memory register 39, and a comparison element 40.

The initial data storage unit 9 comprises an antenna number memory unit 41, a filter number memory unit 42, an interference threshold value memory unit 43, a frequency rating memory unit 44, a maximum frequency memory unit 45 and a lowest frequency memory unit 46 and a unit 47 memory numbers of frequencies allocated for each radio direction.

thirty

40

45

50

55

which is determined by the direction number of the link.

But this signal on the corresponding outputs of block 7 appears coded direction number of communication (p

direction), from which the request was received and for which it is necessary to select the frequency, This number is fed to the inputs of block 9, 12 and 13 which also receives the read signal from block 7,

At the outputs of the Antenna Number and Filter Number of block 9 and 12, the antenna number code and the filter number code, which are assigned to the communication directions, appear. By this block 1 connects the selected antenna to the input of radio receiver 2 and connects the necessary filter between the output of the radio receiver 2 and the input of the analysis unit 4. The filter selection determines the bandwidth in which the interference level is measured.

The code of the radio link number is converted by the memory unit 43 into a digital value of the maximum possible (threshold) level of interference (under which the condition Uc-Un} mK is also fulfilled), which goes to the input of block 5, the signal at the output writing the recording information management threshold level of block 7, which is received at the input Recording the threshold level in block 5 and will ensure recording

Frequency rejection unit 10 contains a reference element 48, the first 49 and the second 50 triggers, the inverter 51 and the And element 52,

The device works as follows.

Before starting work, blocks 9–47 of block 9 memory are recorded, respectively, antenna numbers, filter numbers, interference threshold values, frequency ratings, maximum frequencies, i lowest frequencies, and numbers

frequencies allocated for each radio direction. Record of the specified information

The device is produced from an input device, which in FIG. 1 not shown.

When a request (command) is received to select and issue the optimal operating frequency for a given radio direction, which can be received automatically or through radio operators serving the corresponding communication line, a signal is received at the input of the input

five

0

0

five

0

five

which is determined by the direction number of the communication.

But this signal on the corresponding outputs of block 7 appears the coded number of the direction of communication (radio direction) from which the request was received and for which it is necessary to choose a frequency. This number is fed to the inputs of block 9, 12 and 13 which also receives the read signal from block 7 ,

At the outputs of the antenna number and filter number of block 9 and 12, the antenna number code and the filter number code, which are assigned to these directions of communication, appear. By this code, block 1 connects the selected antenna to the input of radio receiver 2 and connects the necessary filter between the output of the radio receiver 2 and the input unit 4 analysis. Filter selection determines (the bandwidth at which the interference level is measured).

The code of the radio link number is converted by the memory unit 43 into the digital value of the maximum possible (threshold) interference level (at which the condition Uc-Un} mK is still met), which is fed to the input of block 5. At the same time, the output signal is written Record threshold recording control level information block 7, which goes to the input Record the threshold level in block 5 and ensure the recording

therein are the values of the threshold level of interference coming from the memory unit 43.

 the device enters the mode of sequential analysis of the frequencies applied (assigned) to the given radio direction. At the same time, the output of the Frequency Code of unit 7 is the first sequence number (I number). This code will go to memory block 47, which also receives a signal to read information from block 7.

At the output of memory block 47, the code of the first number of the group reserve frequency assigned to the given radio direction from the list of group reserve frequencies allocated to all radio links is obtained. This number will go to the frequency memory block 44, at the output of which a frequency rating code is generated, which arrives at radio receiver 2 and ensures that it is tuned to the first frequency allocated for this radio direction.

At the same time the number of this frequency is fed to the frequency input of block 6 and the input of the number of the analyzed frequency of block 8,

From block 7, block 8 receives a signal that records the current (analyzed) frequency number and translates the block in the analysis mode. Block 8 provides a determination of whether the current frequency was previously given to another direction.

If the frequency was previously issued, then from the first output of the end of the frequency selection of block 8 to block 7, a signal about frequency occupancy is given. According to this signal, block 7 at the output of the Frequency Code provides the formation of the second half of the serial number, the code of which enters memory block 47, at the output of which the code of the number of the second frequency assigned to the radio direction is generated. The radio begins to tune to the second frequency,

If the frequency has not been previously given out to another direction and is free, block 8 outputs to control block 7 a signal allowing further analysis,

Based on this signal, block 7 provides the formation and supply to block 10 of control signals, by which in this block the ratings of the operating frequency and the maximum

735386

neck frequency, and then the operating frequency and the lowest frequency, t, e, a successive comparison of the ratings is made.

If the operating frequency is higher

the highest or lowest lowest frequency, the frequency is rejected and block 7 switches the radio to the next frequency.

If the nominal operating frequency is less than the highest frequency and greater than or equal to the lowest frequency, after completing the analysis from block 10 to block 7, a signal is issued about frequency suitability under the propagation conditions. At the end of the tuning of the radio receiver, the signal about the end of tuning goes to block 4, at the outputs of which, after an analysis of the instrument, the end-II signal is received.

ten

15

20

In the analysis, the signal of the analysis and the value of the interference level at the analyzed frequency occur. The value of the current interference level is recorded in block 5, which will switch to the analog mode, in which the current interference value is compared with the threshold value recorded from memory block 43.

If the current value of the interference is above the threshold, i.e. frequency unsuitable30 for a given signal-to-noise ratio, a signal is generated End of frequency selection at the output of block 5. This signal will go to block 7 and will ensure that the device is transferred to the analysis of the next frequency.

If the current value of the interference level is less than the threshold value, which indicates the frequency is suitable for the signal-to-interference ratio, then this interference level is stored in block 5. At the same time, the number (nominal) of the frequency at which the measurement was made is recorded in block 6, and the control the signal from the output of block 5, arriving at block 7, will switch the device to the analysis mode of the next frequency.

At the end of the second-frequency interference measurement in block 5, the noise levels of the first are compared.

5Q and the second frequency, the best result is memorized and compared with the result of the next measurement.

35

40

45

Upon completion of the analysis of all frequencies assigned to a given radio direction, in block 6 there remains a frequency number that has a minimum value of the interference level and is suitable for the radio link by the Uc / Un ratio,

 15

At the command of block 7, the number of this part toTbi is copied from block 6 of the RAM to the corresponding register of block 8 and is output on the radio link (or display device).

If, according to the results of the analysis, none of the frequencies is suitable for communication, jro in block 6 of the RAM does not have a suitable frequency number and After the end of the cycle, the coded signal about the absence of a frequency suitable for communication is sent to the radio link.

 If during the work a request is received for issuing a frequency from another radio link, it is memorized in block 7 and after the selection of the frequency for the first radio link is finished, the device switches to the choice of the frequency dp of another radio link

Thus, the device, when analyzing the operating frequency for HF radio, ensures its evaluation by the following criteria: the frequency is not used for communication on other radio links; The frequency has a minimum level of interference from all frequencies allocated to this radio link; the interference level at the selected frequency ensures that the signal exceeds the interference required for the radio link to operate in a given mode, i.e. by the condition: U 0: -m - -U.} 0; the frequency is suitable under the conditions of radio wave propagation in the ionosphere i.e. by condition f

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In block 7 of control, upon arrival of a request for issuing a frequency, the first trigger is triggered, and the coded radio line number is sent from the second decoder 14 to block 9, providing information from memory blocks to the antenna switch 1, filter block 3, block 5 for selecting a suitable frequency, block 10, a frequency rejection, a read control signal is generated at the output of the first element OR 13.

The signal from the output of the first shaper 15 sets the first register 17 to a single state and, at the output of the first decoder 18, the code of the first sequence number of the frequency being analyzed, which, entering block 9, will form at the outputs of block 9 the fixed frequency number code entering the blocks 6 and 8, and

0

five

35

,

25

thirty

40

45

50

55

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its nominal value, ensuring the tuning of the radio 2.

At the same time, the signal from the output of the first generator 15 will go to block 5, ensuring the recording of the threshold level of interference in the second register 39 of block 5. The signal from the output of the second element OR 16 will go to the input of block 8 and will provide a record. into it the code of the frequency being analyzed and will transfer the block 8 to the mode of sequential comparison of the numbers of frequencies. When the frequency numbers coincide, the signal from the output of block 8 enters block 7 and sets the first register 17 to the next state. The device switches to the analysis of the second (regular) part. The signal from the output of the second element, OR 16, entering block 4, sets it to the initial state.

If the frequencies do not coincide (which means frequency is free) from block 8, a signal is sent to the second trigger 19 and block 7 begins to generate signals that control the frequency rejection in block 10,

The signal from the first output of the second register 21 will go to block 10, ensuring that the values of the analyzed frequency and the highest frequency are written to it,

After the time T required to operate, the comparison element 48 in block 10 from the second shaper 26 generates a latching signal at the highest frequency, a signal from the second output of the second register 21 is similarly output to record the analyzed frequency and the lowest frequency, and then latching signal from the lowest frequency.

If the frequency is unsuitable, the signal at the output of the second element I 29 turns on, which, having entered the first register 17, will provide the tuning of the radio receiver 2 to the next frequency.

If the frequency is suitable, from block 10. A signal will arrive at block 7 and, therefore, at the output of the first element I 22, a signal 1 will go. This signal will stop the generator 20 (by transferring the second trigger 19 to O), set the second register 21 to its initial state4 and the third trigger 24 goes to state 1 and the signal from its output will begin to flow to block 5,

By this signal the analysis is allowed in block 5, after which the signal from it is sent to

the input of the third trigger 24 and the second element OR 16, the third trigger 24 is set to its initial state, and the first register 17 to the next, providing the tuning of the radio receiver 2 to the next frequency.

The device will proceed to the analysis of the next frequency. After the analysis has been completed, it is necessary to compare the value of the interference,

The signal from the output of the first trigger 34 is fed to the first input of the first element I 37, the second input of which receives the signal from block 7 about the frequency check for busy according to the propagation conditions and resolution

For all frequencies, the signal is shown at the pos-tsi frequency selection. Output signal

The first element And 37 records the new value of the interference level (the best) from the pore register 39 in the first period 31, sets the first trigger 34 to the initial state, is output to block 6, providing the recording of the frequency number, and enters into block 7, signaling the end of the analysis.

the lowest output of the first register is 17 shift. This signal provides for reading the optimal frequency from block 6, writing it to block 8 as an occupied one, as well as setting the first triggers 12 and the first register 17 to the initial state,

In frequency rejection unit 10, the signals generated by the control units 7 are first fed to the comparison element 48 by first feeding the values of the frequency and the lowest frequency to be analyzed, and then to the frequency and the lowest frequency being analyzed. Sequential comparison occurs, with the result that the comparison device produces one of two signs; () or (Ј), Following each comparison with block 7. Signals are successively applied to the inputs of the flip-flops 49 and 50,

However, if the condition

the first flip-flop 49 is set to the single state, if the condition fpt was fulfilled, the signal from the output of the inverter 51 will set the second flip-flop 50 to the single state. Thus, when the condition fM is satisfied (.7 f npc, at the output of the element And 52, the frequency fitness signal is received, which will go to the control unit 7,

In block 5, the frequency selection in the first register 31 at the beginning of the frequency selection cycle is recorded in the threshold value of the interference level at which the ratio Ufc is fulfilled. -in ,, and in the second register 39 from the output of block 4, the current value of the interference at the monitored frequency is recorded, which are compared in the comparison element 40.

If the interference level recorded in the second register 39 is less than the interference level recorded in the first register 31, the signal 1 is set at the output of the comparison element 40 and the first trigger 34 is triggered by the signal from the output of the delay element 32, the delay element 32 provides the delay required for comparison interference values ,,

The signal from the output of the first trigger 34 is fed to the first input of the first element I 37, the second input of which receives a signal from block 7 about the end of the frequency test for busy and on propagation conditions and allowing the choice of frequency. Output signal

The first element And 37 records the new value of the interference level (the best) from the second register 39 in the first period 31, sets the first trigger 34 to the initial state, is output to block 6, ensuring that the number of this frequency is recorded, and enters into block 7, indicating the end analysis.

If the level of interference recorded in the first register 31 is greater than the level recorded in the second register 39, the output signal of the second trigger 35 and the second element 38 is turned on. It is output in block 7, signaling the end of the analysis. In this case, in the second register 39, the value of the threshold level of interference remains.

Formula of invention

Claims (3)

I. Device for automatic analysis of operating frequencies, containing a series-connected antenna switch, a radio receiver, a filter unit and an analysis unit, as well as an initial data storage unit, an operational unit five The frequency selection block, the frequency division detection block and the control block whose inputs are the inputs for the frequency request signal, the output Antenna number1, Filter number, Frequency of the analyzed frequency, Interference threshold and Number of the analyzed storage frequency source data are connected respectively to the control- inputs of the antenna switch and filter unit, to the input frequency setting of the radio receiver, to the input input by 0 horn value of the interference of the frequency selection block and to the combined input of the input of the analyzed frequency number of the frequency occupancy detection block and the frequency input of the operational block 5 frequencies, output The radio tuning end is connected to the control input of the analysis unit, the interference level inputs and the interference level recording level of the frequency selection unit are connected to the outputs of the interference level level and analysis analysis end point, the output of the analysis unit, the output of the main memory unit are the device outputs , the input of the input of the number of the frequency of the block for determining the frequency is connected to the output of the device, the outputs Radio code | , Frequency code and Reading control blink are connected to the radio frequency input code input, frequency input input and input. Readout resolution of the storage data source block, output Record of the threshold level of the control unit is connected to the input Record of the threshold level of the frequency selector unit, output Record of the frequency number control unit - to the input Start of the analysis of the frequency determining unit, you have enabled the writing and reading of the control unit connected to the input Reading the memory unit ten frequency to be analyzed, Resolution to compare the analyzed frequency with the highest frequency, Resolution to compare the analyzed frequency with the lowest frequency and input Set to initial state of the frequency rejection unit, respectively, output Resolution of data output connected to the enable input of the frequency selection unit, input End of analysis connected to the output The frequency is suitable for the frequency rejection unit and the input of the Beginning of the frequency rejection cycle connected to the output Frequency of the free baud of the frequency occupancy detection unit; output Record of the frequency of the control unit is connected to the input of the installation of the analysis unit, the outputs of the highest frequency, 20 Nominal frequency and nominal of the analyzed frequency of the storage unit of the initial data are connected to the inputs of the input of the nominal frequency, the nominal frequency and the nominal and I3-write the frequency selection block, the frequency of the analyzed frequency block reject output The end of the frequency selection of the frequency selector block is connected to the input of the control unit frequency selection cycle, the output Frequency of the frequency occupancy control block is connected to the input End of the frequency block check control, and the second output. The end of the frequency selection of the frequency selection block is connected to the input. Record of the RAM block, characterized in that 35 ki frequencies respectively 2, The apparatus according to claim 1, wherein the control unit contains a memory block, the information input of which is the input of input of initial data, the first trigger is connected to the output of each bit of the memory block, sequentially connected first OR element, inputs which is connected to the outputs of the first triggers, the output is the output of the control unit readout, the first pulse shaper, the output of which is the output of the recording of the threshold level of the control unit, and the second OR element, the second input of which is the input Duplicate frequency test, output - output Record in order to increase the reliability of the analysis, a frequency rejection block is entered into it, the source data storage unit is equipped with outputs of the highest frequency and the nominal frequency, the analysis unit is equipped with an installation input, the frequency detection unit is equipped with an output frequency, the control unit is equipped with outputs the highest frequency, the resolution of the write of the nominal of the lowest frequency, the resolution of the write of the nominal of the analyzed frequency, the resolution of the comparison of the analyzed frequency from the highest frequencies minutes, comparing the analyzed frequency resolution with the lowest frequency and Homing connected respectively to the write enable input nominal maximum frequency resolution recording smallest nominal frequency, the nominal recording resolution anali frequency to be analyzed, Resolution to compare the analyzed frequency with the highest frequency, Resolution to compare the analyzed frequency with the lowest frequency and input Set to initial state of the frequency rejection unit, respectively, output Resolution of data output connected to the enable input of the frequency selection unit, input End of analysis connected to the output The frequency is suitable for the frequency rejection unit and the input of the Beginning of the frequency rejection cycle connected to the output Frequency of the free frequency block of the frequency occupancy detection unit; Exit Recording frequency control room is connected to the setting entry block analysis unit outputs the highest frequency Par, The nominal frequency and the nominal of the analyzed frequency of the storage unit of the initial data are connected to the inputs of the nominal input of the highest frequency, the nominal of the lowest frequency and nominal the analyzed frequency of the block rejects ki frequencies respectively 2, The apparatus according to claim 1, wherein the control unit comprises a memory unit, the information input of which is the input of the input of the initial data, the first trigger is connected to the output of each bit of the memory block, sequentially connected first element OR; are connected to the outputs of the first triggers, the output is the output of the control unit reading, the first pulse shaper, the output of which is the output of the recording of the threshold level of the control unit, and the second OR element, the second input of which is the input frequency test checks, exit by exit Record control unit frequency numbers, the first shift register, the clock input of which is connected to the output of the second OR element, the high bit output of the first shift register, which is the output of the write and read permission of the control unit, is connected to the input of the initial setup of the first shift register and the first triggers and the write enable of the memory block, the first decoder, the inputs of which are connected to the outputs of all bits of the first shift register, except the high, and the output is the output of the radio code of the control unit, second 131 swarm decoder, the inputs of which are connected to the outputs of the first triggers, and the output is the output of the frequency code of the control unit, the second trigger, the tat input of which is the output of the beginning of the frequency rejection cycle, pulse trigger, the trigger input of which is connected to the output of the second trigger, the second shift register , the clock input of which is connected to the output of the pulse generator, the first AND element, the input of which is connected to the high-voltage output of the second shift register, the third OR element, is connected between the output of the first AND element and the input The initial setup of the second trigger and the second shift register, the inverter connected in series, the input of which is connected to the second input of the first element And is the input of the Analysis end of the control unit, and the second element And whose input / output is connected to the higher-order output of the second shift register and to the second input of the second element OR, respectively, the fourth element OR whose inputs are connected to the outputs of the first and second elements AND, and the output is the output Setting the initial state of the control unit, the second th input of the third element OR is connected to the output of the second element AND, the fifth element OR, the inputs of which are connected to the first and second outputs of the second shift register, respectively, outputs Resolution of writing the nominal of the highest frequencies allowed for recording and Resolution of writing of the nominal of the smallest frequencies allowed for recording , the output of the fifth element OR is the output of the recording of the nominal frequency of the analyzed control unit, the second and third pulse shapers, whose inputs are connected to the first and second odes,. The second shift register, and the outputs are respectively the outputs of the comparison of the analyzed frequency with the highest frequency and the resolution of the comparison of the analyzed frequency with the lowest frequency of the control unit, and the third trigger, the clock input of which is connected to the output of the first And element, the setting input of the initial state and the third the input of the second element And is the input End of the cycle of selecting the frequency of the control unit neither, and the output of the third trigger vl 14 Output is the Allowing Data Issue of the Control Unit 3. The device according to p. I, of tl and - so that the block selection frequency contains the first memory register, the information and control inputs of which are the inputs five interference and Record horny level the threshold level of the frequency selection block, respectively, the second memory register, whose information input is the input The current interference level, and the control input — the current level of the frequency selection interference, the comparison element, whose inputs are connected to the outputs of the first and second memory registers, delay, the input of which is connected to the input Record of the current level of interference of the frequency selection unit, the first 3-a block 25 thirty 35 40 45 0 five Your trigger, the inputs of which are connected to the outputs of the delay element and the comparison element, the first and second elements AND, the first inputs of which are the resolution input of the frequency selection block, and the outputs are connected to the inputs of the OR element whose output is the first output . the frequency selector unit, the inverter, whose input is connected to the output of the comparison element, and the second trigger, whose inputs are connected to the outputs of the delay element and the inverter, the outputs of the first and second triggers are connected to the second inputs of the first and second elements, respectively; The first and second trigger states are connected to the outputs of the first and second And elements, respectively, and the output of the first And element, which is the second output. The end of the frequency selection is connected to the input. Record of the first memory register and. 4, The apparatus according to claim 2, wherein the source data storage unit contains memory blocks of antenna numbers, filter numbers, frequency ratings, lowest frequencies, highest frequencies, interference thresholds and frequency numbers allocated for each radio direction, the address inputs of memory blocks antenna numbers, filter numbers, lowest frequencies, highest frequencies and interference threshold values are input to the frequency of the source data storage unit, the address input of the memory block of frequency numbers allocated for each YUCHE-I-ICE1 Oe if-lg Tf TP ft