SU1501284A1 - Apparatus for automatic selection of working frequencies - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the reliability of the choice of operating frequencies that provide the maximum signal-to-noise ratio in the selected direction of radio communication. The device contains an antenna unit 1, a receiver 2, a filter unit 3, an analysis unit 4, a frequency selection block 5, a memory block 6, a control unit (CU) 7, a work frequency occupancy detection block 8, a memory block (CU) 9 allowed frequencies for communication, power supply unit 10 frequency numbers allocated for each radio direction, power supply unit 11 antenna numbers for each radio direction, power supply unit 12 filter numbers, power unit 13 threshold noise levels and decoders 14 and 15. When receiving a request to select and issue the optimum operating frequency for a given radio direction, the CU 7 forms a code The number of the direction of communication, which is fed to the PSU 11, 12 and 13. Then the device switches to the mode of sequential analysis of the frequencies allocated and assigned to this radio direction. At the end of the frequency analysis, the RAM block 6 provides a frequency number suitable for communication in the radio direction and having a minimum level of interference. This frequency is output to the link. At the same time, block 8 provides storage of frequency numbers issued for all radio directions. If, as a result of the analysis, no suitable frequency was found, then a signal for the absence of a suitable frequency is sent to the communication line. 3 hp ff, 4 ill.

Description

3150

forms the coded direction number of the communication, which is fed to the PSU 11, 12 and 13. Then the device switches to the mode of sequential analysis of the frequencies allocated and assigned to the given radio direction. At the end of the frequency analysis, the RAM block 6 issues a frequency number suitable for communication on this radio direction and having a 2828

level of interference. This frequency is output to the link. At the same time in block 8 storage is provided

from frequency numbers assigned to all radio directions. If, as a result of the analysis, no suitable frequency was found, then a signal for the absence of a suitable frequency is sent to the communication line. 3 hp

10 f-ly, 4 ill.

The invention relates to radio engineering and can be used as part of receiving radio centers.

The purpose of the invention is to increase the reliability of the choice of operating frequencies that provide the maximum signal-to-gum ratio in the selected direction of radio communication.

FIG. Figure 1 shows the structural electrical circuit of the device for automatic selection of operating frequencies; in fig. 2 is a structural electrical circuit of the control unit; in fig. 3 is a structural electrical circuit of a frequency selection unit; Fig. A shows a structural electrical circuit for determining the work frequency occupancy.

The device for automatic selection of operating frequencies contains an antenna unit 1, a receiver 2, a filter unit 3, an analysis unit 4, a frequency selection unit 5, an operating memory unit 6, a control unit 7, an operating frequency occupancy determination unit 8, an allowable memory unit 9 frequency communication, block 10 of memory numbers of frequencies allocated for each radio direction, block 11 of memory numbers of antennas for each radio direction, block 12 of the number of filter numbers, block 13 of memory of threshold interference levels, first decoder 14, second decoder 15.

The control unit 7 comprises a memory unit 16, first keys 17, first triggers 18, first element ECH 19, first pulse shaper 20, second OR element 21, second pulse shaper 22, first shift register 23, third pulse shaper 24, first, second , third and fourth encoders 25,26,27 and 28.

Frequency selection block 5 contains the first memory register 29, the second

five

5 0 5

with

memory gist 30, first comparison block 31, first element AND 32, NOT element 33, third element OR 34, second element AND 35, third trigger 36, delay element 37, fourth element OR 38, second trigger 39.

The frequency occupancy determination unit 8 comprises the fourth trigger 40, the clock pulse generator 41, the second shift register 42, the fifth element OR 43, the third memory register 44, the second comparison unit 45, the N third elements 46, the N fourth memory registers 47.

The device works as follows.

Before starting work, the nominal frequencies for communication are recorded in the 9.pam block, the numbers of frequencies allocated for communication in each radio direction are recorded in memory block 10, and the antenna numbers assigned to each radio direction in block 11 memory 12 - filter numbers, and in block 13 - threshold values of interference, at which the specified signal-to-interference ratio is ensured. The recording of this information is made from an input device (not shown).

The frequency numbers recorded in block 10 are simultaneously addresses of block 9 of the memory frequency allocations. The type of antenna is determined by the azimuth and distance to a specific correspondent (i.e., the radio number by N), and the filter type and the specified signal / interference excess (threshold level of interference) are determined by the radio direction, i.e. mode of work with the correspondent.

Upon receipt of a request (KoViaHflu) to select and issue the optimum operating frequency for a given radio frequency 5

The communication, which can be received automatically or through radio operators operating the corresponding communication line, receives a signal at the input of the input of the initial data of the control unit 7, which is determined by the number of the direction of communication. On this signal, on the corresponding outputs of block 7, the coded number of the direction of communication (radio direction), from which the request was received and for which the frequency should be selected, appears. This number is fed to the inputs of blocks 11, 12 and 13 where the read signal from block 7 also arrives.

At the outputs of blocks 11 and 12, an antenna number code and a filter number code appear, which are assigned to these directions of communication. The antenna number code is converted by the decoder 14 into a signal at one of its outputs, and by this signal, block 1 connects the selected antenna to the INPUT of radio receiver 2. The code of the filter number is similarly converted by the second decoder 15, the output of which goes to the filter unit 3 and connects the necessary filter between the output of receiver 2 and the input of block 4 analysis. The filter selection determines the bandwidth in which the interference level is measured.

The code of the radio link number is converted by block 13 into a digital value of the maximum possible (threshold) level of interference, at which the condition U -UK / ha is also fulfilled. The input to block 5. At the same time, a signal appears at the output of the control of information recording of block 7, which is fed to the input of control of recording the threshold level of interference in block 5 and records the value of the threshold level of interference from block 7.

Next, the device enters the mode of sequential analysis of the frequencies assigned to this radio direction. In this case, the output code of the frequency of block 7 is the code of the first sequence number (number 1). This code enters memory block 10, which also receives the information read signal of block 7. The output of block 10 is the code of the first group backup number frequency, zakP12846

from the list of group reserve frequencies allocated to all radio links. This number enters the frequency nominal memory block 9, the output of which generates a frequency nominal code that arrives at receiver 2 and ensures that it is tuned to the first clock IQ, assigned for a given radio direction.

At the same time the number of this frequency is fed to the inputs of blocks 6 and 8.

From block 7 to block 8, a signal arrives, providing a record in block 8 of the current (analyzed) frequency number and transferring block 8 to the analysis mode. Block 8 provides a determination of whether the current was previously

20. The frequency is on the other direction. If the frequency was previously given, then from block 8 to block 7 a signal about frequency occupancy is given. According to this signal, block 7 at the output. The Tbi code often25 Tbi ensures the formation of a second sequence number, the code of which enters into block 10, at the output of which a code of the number of the second frequency assigned to the given

jg radio direction. Receiver 2 begins to tune to the second frequency.

If the frequency has not been previously given out to another direction and is free, then at the end of the analysis in block 8 from it in block 5 a signal is issued to allow further analysis. At the end of the setting of the receiver 2, the signal about the completion of the settings of pos. stumbles into block 4, at the outputs of which, at the end of the analysis, CI1 appears. End of the analysis and the value of the interference level at the analyzed frequency. The value of the current interference level is recorded in block 5, which switches to the analysis mode, in which the current interference value is compared with the threshold value recorded from block 13.

If the current value of the interference is 35

45

50

55

above the threshold, i.e. the frequency is unsuitable for a given signal-to-noise ratio, a signal is generated End of frequency selection at the output of block 5. This signal enters block 7 and ensures that the device is switched to the analysis of the next frequency.

If the current value of the interference is less than the threshold, i.e. frequency is suitable

According to a given ratio, in addition to the wired end of the frequency selection coming to block 7, a record control signal is generated that is output to block 6. This signal to block 6 from the output of block 10 records the number of communication usable in this radio direction.

At the same time, in block 5, the interference value at the current frequency, which was less than the threshold, is recorded as the threshold value of the interference. Thus, when analyzing the next frequency the interference value

already compared with the new threshold value (lower). 5, it provides a choice of frequency, which not only corresponds to the threshold, but also has the minimum value of interference, and records the number of this frequency in block 6.

Upon completion of the analysis of the frequencies allocated to this radio direction, block 7 generates a signal that is fed to the read input of block 6 and the write input of block 8. From the output of the block, a frequency number is given that is suitable for communication on this radio direction and has a minimum level of rgm . Frequencies may be provided to the communication line, a display, etc.

At the same time, the frequency number code goes to block 8, and the / signal from the output of block 7 ensures that it is written to block B. This ensures that 8 numbers of frequencies assigned to all radio directions are stored in the block.

If, as a result of the analysis, a suitable frequency is not found, then a signal for the absence of a suitable frequency is output to the line.

Consider the operation of block B. From the output of block 7 to the input of the beginning of the analysis, a signal is fed. This ensures that the number of the frequency to which the receiver 2 is tuned is written to the register 44 from block 10, and setting the trigger 40 sig nA from which generator 41 starts up is set to one. Signals from the generator 41 start to flow to register 42, at the outputs of which signals are arriving at the readout inputs of registers 47, in which for each radio direction

recorded frequency, issued in the previous cycle (request). On these signals, the frequency numbers from .registers 47, where they were recorded through the keys

0

50

0

0

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46 are sequentially read into comparator block 45, where they are compared with the current frequency number of receiver 2 recorded in register 44. If frequencies coincide, which indicates frequency occupancy, a signal appears at the output of block 45, which OR 43 sets the trigger 40 and the register 42 to the initial state. The same signal from the output of the analysis of the end of the analysis of block 8 goes to block 7 and, having passed the OR 21 element and the driver 22, transfers the register 23 to the next state (advances the unit by one measure). At the output of the encoder 28, the code of the next (second) frequency number appears, and receiver 2 switches to the tuning mode for the second frequency.

If no match occurs, then at the end of the cycle the signal from the output of the last bit of register 42 sets the trigger 40 and register 42 to the initial state, and also goes to block 5, allowing further analysis.

Block 7 works as follows. When a request (command) to select and output a frequency arrives at block 16, the corresponding trigger IB is triggered. The signal from the output of the trigger 18 is fed to the corresponding inputs of the encoders 25, 26 and 27, the outputs of which form the encoded number of the first direction. The code of the number is entered into blocks 11, 12 and 13. At the same time, the signal from the output of the trigger 1B, the OR 19 element passes, closes the keys 17 for the duration of the measurement cycle, and also comes from the output of block 7 to the control inputs of blocks 11, 12, 13 and 10,

The signal from the output of the element OR 19 is fed to the shaper 20 and provides a signal at its output, which is fed to the input of block 5 and provides a recording in block 5 of the threshold level of interference. The same signal, having passed the OR 21 element, is fed to the shaper 22. The signal from the shaper 22 output goes to the clock input of the register 23 and ensures the appearance of a signal at its first output. This signal is fed to the input of the encoder 28, the output of which is formed by the sequence number (first), according to which unit 10 provides the setting for the first selected hour

output of the former 22, block 8, providing the current frequency number

and launching an analysis of frequency checking.

If the frequency is occupied, then the signal from block 8 is fed to the input of the element OR 21 and transfers the register 23 to the next state, which ensures the transfer of the receiver 2 to the second frequency. A similar transition to the analysis of the next frequency is carried out by a command coming from block 5.

Upon completion of the analysis of all frequencies, the signal from the last output of the register 23 enters the blocks 8 and 6, ensuring the frequency is read into the line, and also through the driver 24 sets the block 7 to the initial state,

Block 5 operates as follows. From block 13 to the input of register 29, the value of the threshold level of interference arrives, and from block 7 to register 29 through the OR element 38, the signal for recording the threshold. From the output of block 4, the value of the current value of interference is received, as well as the signal recording this value to trigger 36 and register 30, register 30 to output 30 of block 4 records the level of interference at this frequency, and trigger 36 is set to one. The value of the interference level recorded in the first register 30 of the memory is compared to the threshold recorded in the register 29 of the memory using the comparison unit 31. If the value in register 30 is greater, then a signal does not appear at the output of block 31. In this case, the signal at the output of the element 35 only appears (the trigger 39 is transferred to state 1 by the signal from the frequency occupancy detection unit 8, the trigger 36 to the state 1 by the analysis termination signal from the analysis unit 4 / signal 1 at the output of the element NOT 33 and the element OR 34), the signal from the output of the element And 35 sets the suitable frequency selection block 5 to its original state by throwing the triggers 39 and 36, the Element 37 delays the signal for the time required for the block 31 to operate. At the same time, this cash goes to block 7 per item

50128ch fJ.

1ShN 21 and transfers register 23 to the next state, ensuring the rebuilding of receiver 2 to the next frequency. The ecjni value recorded in memory register 30 is less than the value written in register 29, indicating that the frequency is suitable for a given signal-to-noise ratio, 10 is the output signal of the element 32, This signal coming through the first element Ш1Н 28 on the control input of the register 29, provides recording of a new (smaller) level into it - 15 n interferences.

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Claims (4)

Invention Formula 1, An automatic operating frequency selector comprising an antenna unit connected in series, the control input of which is connected to the output of the first decoder, a receiver whose control input is connected to the output of the memory block of frequencies allowed for communication, the filter unit whose control input is connected with the output of the second decoder, and the analysis unit, the control input of which is connected to the output of the receiver setup, the control unit whose input of the input data is a radio direction input input and a device, a frequency selection unit and a memory unit, characterized in that, in order to increase the reliability of the selection of operating frequencies providing the maximum signal-to-noise ratio in the selected direction of radio communication, an antenna number memory for each radio direction is inserted into it, addressable the input of which is connected to the first output, the radio direction code of the control unit, and the output is connected to the input of the first decoder, the memory block of the number of directions, the address input of which CQ is connected to the output of the frequency code of the control unit and the output is connected to the address input of the memory of the frequencies allowed for communication and the frequency input of the operating memory, the memory of the filter numbers whose address input is connected to the second output Radio control code of the control unit, and the output connected to the input of the second decoder, memory block 55 These thresholds yponnei i are interference, a; i, whose pec input is connected to the third output Radio control code of the control unit, and the output is connected to the input Threshold interference level of the frequency selection unit, working frequency occupancy block, input Radio control code of which is connected to the input The radio code of the memory block of frequency numbers allocated for each radio direction and the fourth output The radio code of the control unit, output Record of the threshold level of the control unit connected to the input Record of the threshold level of the select block and frequencies, output Reading control unit 1 {and connected to inputs Reading antenna storage unit for each radio direction, filter memory block, memory block, threshold interference levels and frequency memory block allocated for each radio direction, output Frequency the free block for determining the operating frequency is connected to the input. The resolution of the analysis of the frequency selection block, the output of the RAM block, is the output of the device, is connected to the input. The nominal value of the selected frequency of the block is determined and frequency of operation, outputs End of analysis, Interference level of the analysis block is connected to the inputs Recording the interference level and Interference level of the frequency selection block, respectively, first output End of the frequency selection of the frequency selection block is connected to the input Record of the operating memory, output Read the selected frequency of the block control unit is connected to the input. Reading the memory block and the input. Record the selected frequency of the occupancy detection unit, the second output. End of the frequency selection of the frequency selector unit is connected. with the input End of the cycle of selection of the control unit, output Frequency of the occupied frequency determination unit is connected to the input End of the frequency control check of the control unit, output Record of the frequency of the control unit is connected to the input Start of the analysis of the operating frequency determination unit, input Code the current frequency of which is connected to the output 0128 t 2 frequency memory block. 2. The device according to claim 1, 1 of which is that the control unit contains a memory block whose information input is the input input of the initial data of the control unit, the output of each bit of the memory block is connected in series with the first key and the first trigger connected in series the first OR element whose output is an upstream Read the control unit 15 and is connected to the control inputs of the first keys, the first pulse shaper, the output of which is the output Record the threshold level of the control unit second item 20 OR, the second and third inputs of which are the input of the End of the frequency check test and the input of the End of the control unit frequency selection cycle, and the second pulse shaper, the output of which is the output Record the number of the control unit frequency, the first shift register, the clock input of which is connected with the release of the second pulse driver, 30, the third pulse shaper, whose input is connected to the output of the last bit of the first register, is the output of the selected frequency readout, and the output is connected to the input of the initial setup of the first shift register and the first triggers and the Record enable input of the memory unit, first the second, third and fourth encoders, the outputs of which are 40 are the first, second and third outputs, the Radio Direction Code and the Frequency Code of the control unit, respectively, the output of each first flip-flop is connected to the corresponding input In the first, second and third encoders, the outputs of the bits of the first shift register are connected to the corresponding inputs of the fourth encoder, the outputs of the first flip-flops are outputs of the output bits of the radio code of the control unit. 3. The device according to claim 1, characterized in that the frequency selection block contains the first memory register whose information input is an input. The interference threshold level of the frequency selection block, the second memory register whose information input is the input. 55 1J interference, a control input is made by the input: ianMCb interference level of a frequency selection unit, connected in series with the first comparison unit, the first and second inputs of which are connected to the outputs of the first and second memory registers, the first AND element whose output is the first output The end of the frequency selection of the frequency selection unit, the element is NOT, the third element OR, another input of which is connected to the output of the first element AND, the second element AND whose output is the second output. The end of the frequency selection of the frequency selection unit, and the second trigger, another the input of which is the input of the resolution analysis of the frequency selection unit, and the output is connected to the second input of the first And element and the second input of the second And element connected in series to the third trigger, the first input of which is connected to the input Record the level of interference of the frequency selection unit, and the second input connected to the output of the second element AND, and a delay element whose output is connected to the third input of the second element AND, the fourth element OR whose output is connected to the input Record of the first memory register, the first input connected to the output of the first And, and the second input is the input Record the threshold level of the frequency selector unit. 4. The device according to claim 1, about tl and - the fact that the block for determining the occupancy frequency contains the fourth trigger, the first the input of which is the input of the beginning analysis of the block for determining the working frequency, the clock pulse generator, the input of which is connected to the output of the fourth trigger, the second shift register, d 15 20 25 0 35 40 . 284 The clock input of which is connected to the output of the reFiepaTopa clock pulse, the fifth element IL IH, the output of which is connected to the second input of the fourth trigger and the input of the initial setting of the second shift register, the third memory register, whose information input is the input of the current frequency code of the block determining the frequency of the operating frequency, the input Record is connected to the first input of the fourth trigger, the second OjroK comparison, the first input of which is connected to the output of the third memory register, the output is the output Frequency chassis op occupancy frequency and is connected to the first input of the fifth OR element, N third AND elements (N is the number of radio-direction code bits), the first input of each of which is the input of the corresponding input bit of the radio direction code of the working frequency determination unit, and the second inputs are the Record input selected. frequency of the working frequency detection block, N fourth memory registers, whose information inputs are input The nominal value of the selected frequency of the working frequency detection block, the output of every fourth memory register is connected to the corresponding second input of the comparator, input Record of the fourth memory register ti with sequence number i (i; 1,2,. ,,, Yu is connected to the output of the i-ro bit of the second shift register, the output (Ntl) -ro bit of the second shift register is connected to the second input of the fifth OR element and ow an output frequency of the free block determining busy raSyuchey frequency.   one J .. g ... w q, .., - N ---. .:, -. ..-. Jte- - ; G: G. T. - “;; -“; - ЖI hi r, i f; L t g 1  Ti i L /five  OK-- ™ - Well g 28 T: W g L.:J .  fS - (I Editor I.Rybchenko FIA Compiled by N. Melnikov Tehred M. Didyk Proofreader N. Borisova Order 4892/56 Edition 626 VNIIPI State KONfHTeTa according to inventions and discoveries at the State Committee on Science and Technology of the USSR 1P035, Moscow, Zh-35, Raushsk nab., A / 5  - --.- - - - - ---- ------ --.-,. Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 fig.Z itj and i and Subscription