RU2060509C1 - Device for recovery of time parameters of fluctuating pulse signals - Google Patents

Abstract

FIELD: broad-band communication systems. SUBSTANCE: device has clock generator 1, electronic switch 2, first and second binary counters 3.1 and 3.2, decoder 4, four NOT gates 5.1-5.4, four AND gates 6.106.4, monostable multivibrators 7.1-7.4, OR gate 8, threshold element 9, differentiating unit 10, pulse center detecting unit 11. EFFECT: provision for not only shaping constant-amplitude pulse trains from fluctuating-amplitude pulse train but also for recovering time parameters of fluctuating-amplitude pulses. 2 dwg

Description

 The invention can be used in broadband communication systems.

A device is known for determining the middle of electric pulses, containing a series-connected generator of quantizing pulses, the output of which is connected to the information input of the second key, the control input of which is connected to the output of the delay element and is the first output of the device, the first key, the input of which is connected to the input of the delay element and is the input of the device, the first counter, an OR element, the first input of which is the installation input of the device, and the output is connected to the installation input of the first about the counter, connected in series with the first differentiation unit, the first inverter, digital divider and digital comparator, as well as the second differentiation unit, the second inverter, the memory unit and the second counter, the counting input of which is connected to the output of the second key, and the installation input is connected to the output of the OR element , the input of the first differentiation unit is connected to the input of the first key, the first and second bit inputs of the digital divider are connected to the corresponding bit outputs of the memory block and the first counter, respectively , The second bit of the digital inputs of the comparator are connected to the respective bit outputs of the second counter, and the output of the digital comparator is the second output of the device, the second input of the block of differentiation connected to the output of the delay element and the output of the second inverter is connected to a second input of OR [1]
The disadvantage of this device is its low functionality, caused by the inability to form from the sequence fluctuating in amplitude and duration of the pulses of the sequence, normalized in amplitude and restored by the duration of the pulses.

The closest in technical essence and the achieved effect is a device for measuring the temporal parameters of fluctuating pulse signals containing a first threshold element, a storage unit, a delay element, a voltage divider and a voltage limiter. The first input of the limiter is connected to the output of the voltage divider, the output of the limiter is connected to the input of the first threshold element, the output of which is the output bus of the device, the reference voltage source, paraphase amplifier, the first and second differentiation units, RS-trigger, electronic switch, controlled linear attenuator, and the first output of the paraphase amplifier is connected to the inputs of the second threshold element and the storage unit, the control input of which is connected to the R-input of the RS-trigger, with the output of the second differential unit the input of which is connected to the output of the first threshold element, the output of the second threshold element is connected to the input of the first differentiation unit, the output of which is connected to the S-input of the RS-flip-flop, the output of which is connected to the control input of the electronic key, the output of which is connected to the control input of the controlled linear attenuator, the output of which is connected to the second input of the voltage limiter, the second output of the paraphase amplifier through the delay element is connected to the input of the controlled linear attenuator, the output is minal unit connected with the electronic key input, a reference voltage supply output connected to an input voltage divider [2]
However, this device also has the disadvantage associated with the impossibility of restoring from the sequence of pulses fluctuating in duration of the pulse sequence restored by the pulse duration.

 The pulses and pauses of the DC current generated at the output of the detector of the ShPS receiver differ from the pulses and pauses at the output of the transmitter of this equipment. Distortion occurs due to the passage of pulses along the channel of the transmitter to the detector output of the receiver.

Usually, a shaper is installed at the detector output, at the output of which rectangular pulses of the same amplitude are generated. Therefore, all distortions of pulses and pauses are reduced only to distortions of their duration, called edge distortions. Edge distortions are characterized by the relative value of the distortion of the duration of the packets (pulses or pauses), determined from the expression
δ = (Δτ / τ _o ) 100, where τ _о nominal (undistorted duration of the package;
Δτ = (τ _о - τ _fact ) duration distortion;
τ _{fact the} actual duration of the package, taking into account distortions (see G.V. Mikutsky, V. S. Skitaltsev. High-frequency communication over power lines. M. Energia, 1977, pp. 315-318).

 It should be noted that the transmission of information in broadband communication systems with frequency hopping is carried out by the formation of pulses or pauses from one to four nominal values of the durations of elementary parcels.

 To eliminate this drawback, the proposed device containing a threshold element, the input of which is the input of the device, an electronic key and a differentiation unit, introduces a clock pulse generator, the output of which is connected to the information input of the electronic key, a unit for determining the middle of the pulses, the input of which is connected to the output of the threshold element and the first output is connected to the combined control input of the electronic key and the input of the differentiation unit, the first binary counter is connected in series, the counting input of which is connected to the output of the electronic key, and the installation input is connected to the output of the differentiation unit, the second binary counter, the installation input of which is connected to the output of the differentiation unit, a decoder, the first AND element, the first waiting multivibrator and the OR element, the output of which is the output of the device, the second element And, the first input of which is connected to the second output of the decoder, and the second waiting multivibrator, the output of which is connected to the second input of the OR element, are connected in series the third element And, the first input of which is connected to the third output of the decoder, and the third waiting multivibrator, the output of which is connected to the third input of the OR element, the fourth element And, the first input of which is connected to the fourth output of the decoder, and the fourth waiting multivibrator, the output which is connected to the fourth input of the OR element, while the first element AND is inserted between the second output of the decoder and the second input of the first element AND, between the third output of the decoder and the second input the second element AND introduced the second element NOT, between the fourth output of the decoder and the second input of the third element AND introduced the third element NOT, between the fifth output of the decoder and the second input of the fourth element AND introduced the fourth element NOT, and the combined third inputs of the first, second, third and fourth elements And are connected to the second output of the unit for determining the middle of the pulses.

 In FIG. 1 shows a block diagram of a device; in FIG. 2 diagrams explaining his work.

A device for restoring the time parameters of fluctuating pulse signals contains a clock pulse generator 1, an electronic switch 2, made, for example, in the form of a two-input element And, the first and second binary counters 3.1 and 3.2, made, for example, on a chip type K155IE7, a decoder 4, made for example, on a chip type K155ID1, the first, second, third and fourth elements NOT 5.1, 5.2, 5.3 and 5.4, made, for example, on a chip type K155LN1, the first, second, third and fourth elements AND 6.1, 6.2, 6.3 and 6.4 and performed, for example, by and in series of three transistors, the first, second, third and fourth waiting multivibrators 7.1, 7.2, 7.3 and 7.4 with pulse durations corresponding to the nominal durations of one, two, three and four nominal durations of the packages, an OR element 8, made, for example, on a chip type K155LE1, threshold element 9, made, for example, in the form of a Schmidt trigger, differentiation unit 10, made, for example, in the form of a differentiating circuit, block 11 for determining the middle of pulses, made, for example, according to [1]
The output of the clock pulse generator 1 is connected to the information input of the electronic key 2, the input of the mid-pulse determining unit 9 is connected to the output of the threshold element 9, the input of which is the input of the device, and the first output is connected to the combined control input of the electronic key 2 and the input of block 10 differentiation, the first binary counter 3.1 is connected in series, the counting input of which is connected to the output of the electronic key 2, and the installation input is connected to the output of the differentiation unit 10, the second binary the second counter 3.2, the installation input of which is connected to the output of the differentiation unit 10, the decoder 4, the first element And 6.1, the first standby multivibrator 7.1 and the element OR 8, the output of which is the output of the device, the second element And 6.2 is connected in series, the first input of which is connected to the second the output of the decoder 4, and the second waiting multivibrator 7.2, the output of which is connected to the second input of the OR element 8, the third element AND 6.3 is connected in series, the first input of which is connected to the third output of the decoder 4, and the third waiting multi a vibrator 7.3, the output of which is connected to the third input of the OR element 8, a fourth AND element 6.4 is connected in series, the first input of which is connected to the fourth output of the decoder 4, and the fourth waiting multivibrator 7.4, the output of which is connected to the fourth input of the element OR 8, between the second output of the decoder 4 and the second input of the first element And 6.1 introduced the first element NOT 5.1, between the third output of the decoder 4 and the second input of the second element And 6.2 introduced the second element 5.2, between the fourth output of the decoder 4 and the second input of the third element On 6.3, the third element is NOT 5.3, between the fifth output of the decoder 4 and the second input of the fourth AND 6.4 element, the fourth element is NOT 5.4, and the combined third inputs of the first, second, third and fourth elements AND 6.1, 6.2, 6.3 and 6.4 are connected to the second output block 11 determine the middle of the pulses.

 The device operates as follows.

The pulse sequence U _{1, which} varies in amplitude and duration (see Fig. 2, a), corresponding to information packets, is input to the threshold element 9. If the first pulse of the sequence U ₁ corresponding to the duration of one packet is fed to the input of the threshold element 9, then its output produces a positive pulse U ₂ (see Fig. 2, b), which is fed to the input of block 11 determining the middle of the pulses. At the first output of block 11, the same positive pulse U ₃ (delayed by τ ₃₎ is generated (see Fig. 2, c), which is fed to the control input of the electronic key 2, to the information input of which the clock pulses from the output of the generator 1 U ₄ (see Fig. 2, d), and the input of the unit 10 differentiation.

Velocity τ _{3 of the} delay is determined based on half the duration of the maximum pulse of the sequence U ₁ (see Fig. 2, a), and the pulse repetition period U ₄ (see Fig. 2, d) based on the selected division coefficient n of the first counter 3.1 and maximum relative value δ (Δτ / τ _о ) · 100 distortion of the duration of the package.

The front of the first pulse U _{3 by} differentiation unit 10 is differentiated and in the form of the first positive pulse U ₅ (see Fig. 2, e) is supplied to the installation inputs of the first and second binary counters 3.1 and 3.2, translating them to the initial state, and at the output of the electronic key 2, the first series of pulses U _{6 is formed} (see Fig. 2, e), which is fed to the counting input of the first binary counter 3.1. When the nth clock pulse arrives at the counting input of the first binary counter 3.1, a logical "1" voltage is generated at the first output of the decoder 4, which is fed to the first input of the first AND 6.1 element, and the voltage does not change at its other outputs, but remains logical "0" and form at the outputs of all elements NOT logical voltages of "1". From the output of the first element NOT 5.1, the logical "1" voltage is supplied to the second input of the first AND 6.1 element, the second input of which also receives the logical "1" voltage from the first output of the decoder 4.

If the first pulse U ₃ (see Fig. 2, c) reaches its middle at the second output of the block 11 determine the middle of the pulses, a positive pulse U _{7 is} generated (see Fig. 2, g), which is fed to the third inputs of each element I. As a result of the presence of logical “1” voltages at the first and second inputs of the first AND 6.1 element, a positive pulse U _{7 is} also generated at its output, which is fed to the input of the first standby 7.1 multivibrator. The first waiting multivibrator 7.1 is started and a positive impulse U ₈ is generated at its output (see Fig. 2, h), the duration of which is set equal to the duration of one parcel. From the output of the first waiting multivibrator 7.1, a positive pulse U ₈ through the element OR 8 in the form of a pulse U ₉ (see Fig. 2, and) is fed to the output of the device.

When the second pulse of the sequence U ₁ (see Fig. 2a) arrives at the input of the threshold element 9 with a duration corresponding, for example, to the duration of two packages, a second positive pulse U ₂ is generated at its output (see Fig. 2b), which also goes to the input of the block 11 determine the middle of the pulses. At the first output of block 11, the same positive pulse U ₃ (delayed by time τ _{3) is} generated (see Fig. 2, c), which is fed to the control input of electronic key 2, to the information input of which pulses U are received from the output of generator 1 ₄ (see Fig. 2, d), and the input of the differentiation unit 10. The front of the second pulse U _{3 by} block 10 is differentiated and in the form of a second positive pulse U ₅ (see Fig. 2, e) is supplied to the installation inputs of the first and second binary counters 3.1 and 3.2, translating them into the initial state, and at the output of the electronic key 2 a second series of pulses U _{6 is formed} (see Fig. 2, e), which is fed to the counting input of the first binary counter 3.1. When the second binary counter 3.1 receives a 2n-th pulse at the counting input 3.1 at the second output of the decoder 4, a logical "1" voltage is generated, and at its other outputs the voltages become equal to the logical "0" voltage, which translates the first element NOT 5.1 to the logical "0" position ", and the second, third and fourth elements are NOT 5.2, 5.3 and 5.4 in the logical state" 1 ". Thus, from the second output of the decoder 4 and the output of the second element NOT 5.2 to the first and second inputs of the second element And 6.2, respectively, the logical voltage "1".

If the second pulse U ₃ (see Fig. 2, c) reaches its middle at the second output of the mid-pulse determination unit 11, a positive pulse U _{5 is} generated (see Fig. 2, e), which is fed to the combined third inputs of the first, second , the third and fourth elements 6.1, 6.2, 6.2 and 6.4. As a result of the presence of logical “1” voltages at the three inputs of the second element And 6.2, a positive pulse U ₇ is generated at its output, which is fed to the input of the second waiting multivibrator 7.2. The second waiting multivibrator 7.2 starts and generates a pulse U ₁₀ (see Fig. 2, k), the duration of which is set equal to the duration of two nominal packages. From the output of the second waiting multivibrator 7.2, the generated pulse U ₁₀ (see Fig. 2, k) through the OR element 8 in the form of a second pulse U ₉ (see Fig. 2, and) is fed to the input of the device.

Upon receipt of the input of the threshold element 9 of the third or fourth pulse of the sequence U ₁ (see Fig. 2, a) with a duration corresponding to the durations of three or four parcels, respectively, the pulse recovery process is repeated. Only when a third pulse of the sequence U ₁ arrives (see Fig. 2, a), a logical "1" voltage is generated at the third output of the decoder 4, and the third waiting multivibrator 7.3 generates a positive pulse U ₁₁ (see Fig. 2, l) with a duration of equal to the duration of three nominal parcels.

If the fourth pulse of the sequence U ₁ (see Fig. 2a) arrives at the device’s input, a logical “1” voltage is generated at the fourth output of the decoder 4 and the fourth waiting multivibrator 7.4 generates a positive pulse U ₁₂ (see Fig. 2, m) duration equal to the duration of four nominal parcels.

 Thus, the proposed technical solution in comparison with the prototype allows not only to generate from a sequence of fluctuating pulses by the amplitude of the pulses a sequence of constant pulses in amplitude, but also to restore the temporal parameters of the fluctuating pulses.

Claims (1)

 A device for restoring the temporal parameters of fluctuating pulse signals, containing a threshold element, the input of which is the device input, an electronic key and a differentiation unit, characterized in that a clock pulse generator, first and second binary counters, a decoder, from the first to fourth elements are NOT inserted , from the first to the fourth elements AND, from the first to the fourth waiting multivibrators, the OR element and the unit for determining the middle of the pulses, the input of which is connected to the output of the threshold element, you The clock pulse generator is connected to the electronic key information input, the control input of which is connected to the first output of the mid-pulse determination unit and the input of the differentiation unit, the output of which is connected to the installation inputs of the first and second binary counters, the counting inputs of which are connected respectively to the outputs of the electronic key and the first binary counter, the output of the second binary counter is connected to the input of the decoder, the first and fifth outputs of which are connected respectively with the first input ohm of the first element And and through the fourth element NOT with the second input of the fourth element And, the third input of which is connected to the output of the block for determining the middle of the pulses and the combined third inputs of the first, second and third elements And, the second inputs of which are connected respectively through the first, second and third elements NOT with the corresponding second, third and fourth outputs of the decoder, which are connected to the first inputs of the second, third and fourth elements And, respectively, whose outputs and the output of the first element And are connected respectively through the second, third, fourth and first waiting multivibrators with the corresponding inputs of the OR element, the output of which is the output of the device.

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