RU2042270C1 - Device for search of noise-like signal - Google Patents

Abstract

FIELD: radio engineering. SUBSTANCE: device for search of noise-like signal has analog-to-digital converter 1, first and second registers 2, 4 of number, on-line storage 3, first and second detectors 5, 7, time-matching unit 6. EFFECT: provision for reduced search time - twofold for single test of points of false alarms and three-fold for double test. 2 dwg

Description

 The invention relates to radio engineering and can be used in communication systems with noise-like signals.

 A device for searching for a noise-like signal is known, comprising a series-connected analog-to-digital converter (ADC), a first number register, random access memory, a second number register, and a detector.

 A disadvantage of the known device is that each false alarm is checked by re-recording and reading, and this leads to an increase in search time.

 The goal is to reduce search time.

 In FIG. 1 is a structural electrical diagram of a device for searching for a noise-like signal; figure 2 is a structural diagram of a block matching in time.

 A device for searching for a noise-like signal contains an analog-to-digital converter (ADC) 1, a first number register 2, random access memory 3, a second number register 4, a first detector 5, a time matching unit 6, a second detector 7. A time matching unit 6 contains the first and second shapers 8, 9 of the pulse train, the switch 10, the node 11 of the reversible counters, the node 12 for turning on the signal copy generators in the second detector.

 A device for searching for a broadband signal operates as follows.

 The input signal is converted by analog-to-digital converter 1 into binary form and is written to the random-access memory node 3 through the first register 2 of the number 3. Information from this node 3 is read at a speed much higher than the write speed and is transmitted through the second register 4 of the number to the first detector 5, who makes a decision about the presence or absence of a signal.

 When an alarm occurs, the cyclic reading of information from the random access memory 3 and the corresponding checks by the first detector 5 for the presence of a signal in compressed time continues, and the second detector 7 checks the detected signal.

 The matching of the copy of the signal in the second detector 7 with the alarm point on the time axis is carried out by the matching unit in time.

 If the second detector 7 decided on the presence of a signal, the search is terminated. Otherwise, subsequent alarms will be checked until a signal is detected.

 Block 6 coordination in time works as follows.

 At the inputs of the shapers 8, 9 of the pulse sequence, clock pulses from the first detector 5 are received, on which the pseudorandom sequence “TI PSP” and the “K Signal” signal end pulses are generated, which are issued from the first detector 5 at the end of the signal copy. The first shaper 8 also receives the channel number of the first detector 5, in which the detection of signal N. was recorded. According to the “K Signal” signal, the second shaper 9 sends n pulses to the switch 10, where n is the number of channels in the first detector 5. When a signal is detected by the first shaper 8 is issued to the switch 10, the number of pulses equal to the channel number.

 The signal "To Sign" in the absence of alarm on all l reverse counters 11, the switch 10 generates n pulses, where l is the number of channels in the second detector 7.

 If the threshold is exceeded in one of the channels of the first detector 5, then the signal “K Signal” records the number of pulses equal to the channel number through the switch 10 through the switch 10, and n pulses are recorded in the remaining reverse counters. From the moment of the first alarm and until the signal “To Int.Zap” of the end of the recording interval arrives at the input of the switch 10, no pulses are received at the input of the first counter 11. The signal "To Int. Zap" is issued at the end of the time interval for recording information in the random access memory 3 and then with a period equal to this interval.

 By the signal "To Int. Zap" the first reversible counter 11 is turned on for subtraction and "TI Zap" is received at its input. At the moment when the value of the first reversible counter 11 is zero, a signal to turn on the generator of the copy of the first channel is issued to the second detector 7.

 With the second alarm, the second reversible counter, etc., is similarly activated.

Claims (1)

 A DEVICE FOR SEARCHING FOR A NOISE SIGNAL, comprising an analog-to-digital converter, a first number register, random access memory, a second number register, a detector, the input of the analog-to-digital converter connected to the input of the device, characterized in that, in order to reduce the search time , a time matching unit and a second detector are introduced in series, the second input of which is connected to the input of the analog-to-digital converter, while the output of the first detector I am connected to the first input of the matching block in time, the second input of which is connected to the first output of the second detector, the second output of which is the output of the device.

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