RU2012124625A

RU2012124625A - METHOD FOR REVIEWING PULSED-DOPLER RADIOCOLATION OF TARGETS ON THE BACKGROUND OF PASSIVE INTERFERENCE

Info

Publication number: RU2012124625A
Application number: RU2012124625/07A
Authority: RU
Inventors: Дмитрий Геннадьевич Дмитрович; Андрей Евгеньевич Колобов; Виктор Викторович Астрахов; Александр Андреевич Кириченко; Иван Васильевич Колбаско
Priority date: 2012-06-14
Filing date: 2012-06-14
Publication date: 2013-12-20
Also published as: RU2513868C2

Abstract

Способ обзорной импульсно-доплеровской радиолокации целей на фоне пассивных помех, заключающийся в обзоре пространства путем формирования и направленного излучения в каждом угловом элементе разрешения поискового пространства когерентной импульсной последовательности зондирующих посылок с гиперболической вобуляцией периода повторения и длительности импульсов и их общим числом, удовлетворяющим условиям допустимости частотного разделения принимаемых эхо-сигналов на линейно-частотно-модулированные парциалы и достаточности частотно-скоростной избирательности РЛС для обнаружения целей на фоне пассивных помех и однозначного скоростного местоопределения обнаруживаемых целей, соосного направленного приема в паузах зондирующих посылок РЛС эхо-сигналов целей и помеховых переотражений с последующей их время-частотной обработкой путем бланкирования принимаемых эхо-сигналов на время излучения зондирующих посылок, их частотного разделения на линейно-частотно-модулированные парциалы, частотной демодуляции линейно-частотно-модулированных парциалов, частотной режекции помеховых переотражений, противопомеховой весовой обработки, многоканальной спектрально-фильтровой обработки отрежектированных линейно-частотно-модулированных парциалов и выборочного суммирования сигналов спектрально-фильтровой обработки линейно-частотно-модулированных парциалов, согласованных по частотным и временным сдвигам эхо-сигналов с отдельно взятых элементов разрешения поискового пространства, и пороговой обработки сигналов выборочного суммирования, отличающийся тем, что по завершению каждого цикла бланкирования �A method for surveying pulse-Doppler target radar against a background of passive interference, which consists in reviewing the space by generating and directing radiation in each angular resolution element of the search space of a coherent pulse sequence of probe packets with hyperbolic wobble of the repetition period and duration of the pulses and their total number satisfying the conditions of frequency permissibility separation of received echoes into linearly-frequency-modulated partial and frequency sufficiency No-speed radar selectivity for target detection against the background of passive interference and unambiguous speed location of the detected targets, coaxial directional reception in pauses of the radar probe pauses of the target echoes and interfering reflections with their subsequent time-frequency processing by blanking the received echo signals for the duration of the radiation sounding parcels, their frequency division into linearly-frequency-modulated partial, frequency demodulation of linearly-frequency-modulated partial, frequency cut interfering reflections, anti-interference weighting, multichannel spectral-filter processing of rejected linear-frequency-modulated parts and selective summing of signals of spectral-filter processing of linear-frequency-modulated parts, matched by frequency and time shifts of echo signals from individual search resolution elements space, and threshold processing of selective summation signals, characterized in that at the end of each blanking cycle

Claims

A method for surveying pulse-Doppler target radar against a background of passive interference, which consists in reviewing the space by generating and directing radiation in each angular resolution element of the search space of a coherent pulse sequence of probe packets with hyperbolic wobble of the repetition period and duration of the pulses and their total number satisfying the conditions of frequency permissibility separation of received echoes into linearly-frequency-modulated partial and frequency sufficiency No-speed radar selectivity for target detection against the background of passive interference and unambiguous speed location of the detected targets, coaxial directional reception in pauses of the radar probe pauses of the target echoes and interfering reflections with their subsequent time-frequency processing by blanking the received echo signals for the duration of the radiation sounding parcels, their frequency division into linearly-frequency-modulated partial, frequency demodulation of linearly-frequency-modulated partial, frequency cut interfering reflections, anti-interference weighting, multichannel spectral-filter processing of rejected linear-frequency-modulated parts and selective summing of signals of spectral-filter processing of linear-frequency-modulated parts, matched by frequency and time shifts of echo signals from individual search resolution elements space, and threshold processing of selective summation signals, characterized in that at the end of each blanking cycle receive are echo signals at regular pulse radiation time of the probe for sending interpulse interval of their succession blanking period of the echo signals are subjected to weighting processing vnutriperiodnoy legally

,

t = [0 T _S ],

where t is the current time of the processing of the received echo signals;

k is the numbering of the processed complex conjugate pairs of linearly-frequency-modulated partial echo signals, the lower and upper frequency bands of which are symmetrically spaced from their central carrier frequencies;

K = ENT (0.5ΔF _pr / F _p ) -1 - selected from the condition of permissible energy losses due to the limited frequency band of the radar receiver, the total number of processed complex conjugate pairs of linearly-frequency-modulated partial echo signals;

ENT - operator of rounding to the smallest integer value;

ΔF _etc. - the effective frequency band radar receiver;

h is the duty cycle of the probing parcels;

T _s - the duration of the received echo signals subjected to time-frequency processing;

A _k (h) - tabulated weight coefficients of the polyharmonic series;

- the relative deviation of the repetition frequency of the sounding parcels;

ΔF _p - the deviation of the repetition frequency of the sounding parcels;

F _p - the average repetition rate of sounding packages.