SU614543A1 - Arrangement for discriminating pseudonoise signals - Google Patents

Description

This invention relates to radio engineering, and it can be used in devices whose carrier or subcarrier oscillations vary in a randomized manner. A device for searching for pseudo-noise signals is known. It has a clock pulse generator, the output of which is connected to one input of the inhibit epecaite, to the other input of which the output of the correlator is connected through a series-connected two-threshold decisive element and a control element, the output of the inhibit element is connected to clocks at the input of the shift register with logical feedback l. : However, this device requires considerable time for additional pseudo-random pseudo-random sequence, the duration of which, with a significant expansion of the capture zone, exceeds the time of the main search. The aim of the invention is to reduce the search time for pseudo-noise signals while simultaneously expanding the capture zone. To do this, a pseudo-swap signal search device that has a clock pulse generator, the output of which is connected to one input of the inhibit element, another input of which is connected to the output of the correlator through the serially connected two-port resolver element, and the control element, to the clock input of the shift register with logical feedback, a switch and serially connected) p pseudo noise signal distributor, a fan block, OR, with the shift register outputs c The Gogk feedback has been connected to the corresponding inputs of the distributor of noise muzzles, another output of the control element is connected to the input of the Mutator com, the outputs of which are connected to the corresponding inputs of the valve block, and the element is connected to the input of the correlator. The drawing shows the structural electrical diagram proposed device. The pseudgaium signal search device contains signals 1 clock generator and a pulse jcoBi whose output is connected to one inlet of the prohibition element 2, the output of the correlator 3 is connected to another i-oporo input through | lastly, the fused-connected two-threshold decisive element 4 and the upright one the output of the prohibition element 2 is connected to the clock-input of the shift register 6 with the log1 on the switch. feedback, chommugagor 7 and after-., distributor 8 pseudo-noise sigads :, block 9 of gates, bpeeit OR 10, with register outputs ,; The 0 offsets with the preschool feedback are connected to the co-wired inputs of the distribution pseudo-noise 8 control pins, the other output of the control element 5 is connected to the input of the switch 7, the outputs of which are connected to the corresponding inputs of the is P valve, and the output of the OR 10 sub switch | the entrance to the correlator of the torus 3.

The devices operate in a very efficient way. At the very beginning, the control element 5 that is controlled by Muthor 7 oi 20 hides one of the controlled Hungarian cards 9, i. at the input of itoToporo at the sum of all the pseudo-ray sequences, half of the / that were removed from the direct outputs, and the other / half of the output from the riibix output – times of the 25 shift register 6 shift with the fireback feedback Any number of pseudo-spouse-participator traced Bones, (PSP) is chosen taii, so that it is a multiple of two, and the capture zone at a given PSP Duration was; optimal from the point of resolution | ; Umvnsheshsh time Meni poibka,

Thus, at the initial moment of time, the correlator 3 acted with regisg. {over 6 shifts with the logic feedback 35 the sum of all possible SRPs and the input oscillation. If, at the output of the correlator of the 3, the setting does not exceed the positive threshold and is not less than the negative threshold values, then the PP at the output of the two-threshold decision element 4 will be a zero value, according to which the control element 5 by means of the prohibition 2 locks the clock hour generator 1 ... clock pulses on. a certain time, in the re-aulat of which the supports are 5 sticks, the bandwidth is held for some time equal to or less than the 3axBafia zone. This process with / pitch of the on-line memory bandwidth lasts as long as it is;

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|} and 3 not on vits voltage exceeding

modulo at least one of the threshold values-1

Aii.

After the first excess modulo one of. threshold values do not follow step-by-step search, but rather shifting of the supports: Half sequences by half of the capture zone, if at the output of the two-threshold {dasher element 4 there is a positive release or locking of the first wipe of the second controlled valve of the wicks 9, if on the double-threshold lock element 4 has a negative | outlier. Further, the gears and the shift of the reference bandwidth are a quarter of the capture zone, igaa ogpiraniyo | on the controlled valves of the valve block 9, and g. until the exact position of the received signal is obtained from the fire reference signal.

Ф о рм у л and from a gain

Device for searching for noise-noise srtArtOBj. The clock pulse generator whose output is connected to one input of the inhibition element, to the other input of which the output of the cor- rector is sourced via the next: two-threshold decisively connected and control element, the output of the prohibition element is connected to the clock input of the shift register with a logical reverse connection, .o tl and h yushe by the fact that, in order to reduce the search time for pseudo-new ones; signals, while simultaneously capturing the capture zone, the switch and the successively connected pseudo-noise signal distributor, unit of Hungarians, electric current 1WL, with atom outputs of the shift register; With logical input connected to the corresponding inputs of the distributor of pseudo-noise signals, another control unit; The sensor is connected to the input KOMMJH: Gatora, the output of KOTopio o is connected to the corresponding inputs of the unit with a ventasa, and the output of the element OR is connected to the input of the correlator,

East Info Information, taken into account when externity:

1. USSR author's certificate M 37O732, cl. H 04 B 1/66, 1972.

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