SU708272A1

SU708272A1 - Arrangement for time-diversity processing of pulse signals

Info

Publication number: SU708272A1
Application number: SU772535212A
Authority: SU
Inventors: Дмитрий Александрович Шаров; Александр Евгеньевич Охрименко; Игорь Николаевич Шабельников
Original assignee: Минское Высшее Инженерное Зенитное Ракетное Училище Противовоздушной Обороны
Priority date: 1977-10-10
Filing date: 1977-10-10
Publication date: 1980-01-05

Description

1one

Изобретение относитс к радиотехнике , может использоватьс дл коррел ционного анализа импульсных сигналов .The invention relates to radio engineering, can be used for the correlation analysis of pulse signals.

Известно устройство пространственно-временной обработки импульсных сигналов, содержащее фазированную антенную решетку, N выходов которой . через одноименные N управл емых фазовращателей соединены с соответствующими из N входов сумматора 1.A device for spatial-temporal processing of pulsed signals, containing a phased antenna array, N outputs of which are known. through the same N controlled phase shifters connected to the corresponding of the N inputs of the adder 1.

Однако известное устройство построено по сложной схеме.However, the known device is constructed according to a complex scheme.

-Цель изобретени - упрощение устройства путем исключени управл емых элементов задержки.The purpose of the invention is to simplify the device by eliminating controllable delay elements.

Дл этого в устройство пространственно-временной обработки импульсных сигналов, содержащее фазированную антенную решетку, N выходов которой через одноименные N управл емых фазовращателей соединены с соответствующими из N входов сумматора, введен коррел тор, вход которого соединен с выходом сумматора.For this purpose, a spatio-temporal processing of pulse signals containing a phased antenna array, whose N outputs are connected to the corresponding of the N inputs of the adder through the same name N controlled-input device, is connected to the output of the adder.

Коррел тор содержит последдовательно включенные генератор дополнительных колебаний, сумматор, первый ампли .тудный ограничитель, первый узкополосный фильтр, блок вычитани , фазовый детектор и различитель пол рности . Второй выход генератора дополнительных колебаний через последовательно включенные второй амплитудный ограничитель и узкополосный фильтр соединен со BToptjM входом блока вычитани , третий выход генератора соединен со вторым входом фазового детектора , второй вход с т« матора вл етс входом коррел тора.The correlator contains successively included additional oscillator, adder, first amplitude limiter, first narrowband filter, subtraction unit, phase detector, and polarity discriminator. The second output of the additional oscillator is connected through the second amplitude limiter and the narrowband filter connected in series to the BToptjM input of the subtractor, the third output of the generator is connected to the second input of the phase detector, the second input from the matrix is the input of the correlator.

Генератор дополнительных колебаний содержит последовательно включенные опорный генератор, блок управлени фазой, блок задержки и усилитель при этом первым, вторым и третьим выходами генератора дополнительных колебаний . вл ютс соответственно первый и второй выходы усилител и выход блока управлени фазой.The additional oscillator comprises a series-connected reference oscillator, a phase control unit, a delay unit, and an amplifier with the first, second, and third outputs of the additional oscillator. the first and second outputs of the amplifier and the output of the phase control unit are respectively.

На чертеже изображена структурна электрическа схема предложенного устройства.The drawing shows a structural electrical circuit of the proposed device.

Claims

The correlator included in the device contains an adder 1, a first amplitude limiter 2, a first narrowband filter 3, a subtraction unit 4, a phase detector 5, a polarity discriminator 6, a second amplitude limiter, a second narrowband filter 8, and an additional oscillator 9 that includes the unit delays 10, a phase control unit 11, a reference generator 12 and an amplifier 13. The device also contains a phased array antenna 14, controllable phase shifters 15 and an adder 16, the device operates as follows, multi-element outputs Phased antenna array 14, after passing through controlled phase shifters 15, in which the quadratic phase shift is compensated, are combined into a single processing channel using sum 16 of the matrix. Then, the input pulse signal and the additional oscillation from the oscillator 9 are input to the adder. If the delay of the received pulse signal and its phase coincide with the delay and phase of the additional oscillation (i.e., the pulse enters the window of the additional band and continues its phase) at the output of adder 1, a monochromatic oscillation is obtained. This oscillation through limiter 2 and narrowband filter 3 is fed to one of the inputs of subtraction unit 4, to the other input of which the voltage from additional oscillator 9 passes, passed limiter 7 (identical to limiter 2) and narrowband filter 8 (identical to filter 3). Thus, if there is no voltage at the input, it is not at the output of block 4. If a pulse arrives at the input, but its delay and phase do not coincide with the reference voltage, the voltage supplied to block 4 from the input is lower than the voltage from the additional vibration generator 9, which is detected by the phase detector 5 and the differential polarity at the output block 4 subtraction. If the input signal (pulse) coincides in delay and phase with the reference voltage, the voltage at the corresponding input of the subtraction unit 4 increases, which is detected by the phase detector 5 and the polarity discriminator 6. The proposed device provides optimal processing of the pulse signals at the time processing stage in the phased antenna array channels and at the same time greatly simplifies the spatial part of the processing for large apertures when the time and spatial part of the signal processing are not separated. Claim 1. A device for spatial-time processing of pulse signals containing a phased antenna array, N outputs of which are connected through corresponding N controlled phase shifters to the corresponding of the N inputs of the adder, which, in order to simplify the circuit by eliminating. controllable delay elements, an -correlator is introduced into it, the input of which is connected to the output of the adder.

2. A device according to claim 1, characterized in that the correlator comprises a series of Additional oscillations, an adder, a first amplitude limiter, a first narrowband filter, a subtraction unit, a phase detector and a polarity discriminator, while the second output of the additional oscillators through sequentially the included second amplitude limiter and narrowband filter are connected to the second input of the subtraction unit, the third output of the additional oscillator is connected to the second input of the phase circuit torus, and the second input of the adder is input to the correlator.

3. The device according to p, 2, characterized in that the additional oscillator comprises a series-connected reference oscillator, a phase control unit, a delay unit and an amplifier, the first, second and third outputs of the additional oscillator being the first and second outputs of the amplifier and the output phase control unit. Sources of information taken into account in the examination 1. Theoretical foundations of radar, under. ed. POISON. Shirman, M., Sov. Radio, 1970, p. 231, fig. 5.16 (prototype).