Portable automatic radar simulator
First Claim
1. A digital radar simulation system for simulating up to 2048 pre-programmed radar signatures, said digital radar simulation system comprising:
- thumbwheel switching means for providing a plurality of digital logic signals, said digital logic signals being representative of 2048 pre-programmed radar signatures said digital radar simulation system simulates, said thumbwheel switching means upon being set to one of the 2048 radar signatures to be simulated providing the most significant bits of the digital address indicative of said radar signature;
sequencing means for providing the least significant bits of said digital address indicative of said radar signature being simulated;
memory means for storing said 2048 radar signatures therein, said memory means in response to the address supplied by said thumbwheel switching means and said sequencing means providing an eight bit control word, a pair of pulse repetition interval data words, a plurality of lobe data words and a plurality of scan data words for the radar signature being simulated;
control register means for receiving said eight bit control word and storing said control therein while said radar signature is being simulated;
the first and second bits of said control word representing a pulse width for the radar signature being simulated;
pulse repetition interval generating means forreceiving a pair of eight bit data words from said memory means, said first eight bit data word being the least significant bits of said pulse repetition interval and said second eight bit data word being the most significant bits of said pulse repetition interval;
said pulse repetition interval generating means, responsive to said first and second data words generating a pulse repetition interval for the radar signature being simulated;
jitter generating means for receiving the third, fourth and fifth bits of said control word and in response to the third, fourth and fifth bits of said control word providing either a sixty four microsecond shortened time period for ever other pulse repetition interval generated by said pulse repetition generating means or a one hundred twenty eight microsecond shortened time period for every other pulse repetition interval generated by said pulse repetition generating means;
beamwidth and scan generating means for generating a beamwidth and side lobes for the radar signature being simulated in response to the lobe data words supplied thereto by said memory means, said lobe data words being indicative of the beamwidth and side lobes of the radar signature being simulated;
said beamwidth and scan generating means generating a scan and scan period for the radar signature being simulated in response to the scan data words supplied thereto by said memory means;
frequency hop generating means for generating a frequency hop within the radar signature being simulated by said digital radar simulation system, said frequency hop being generated by said frequency hop generating means in response to the sixth bit of said control word; and
output circuit means for receiving the seventh and eight bits of said control word, for providing in response to the seventh bit of said control word a direct scan radar signature and for providing in response to the eight bit of said control word a pulse group within the radar signature being simulated and for gating the pulse repetition interval, the frequency hop, the beamwidth, side lobes, scan and scan period into the radar signature being simulated by said digital radar simulation system.
1 Assignment
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Accused Products
Abstract
A portable radar simulator which when connected to a transmitting means s as a magnetron generated microwave threat transmitter simulates up to 2048 pre-programmed radar signatures. The portable radar simulator comprises a replaceable Erasable Programmable Read Only Memory (EPROM) which will hold up to 2048 pre-programmed radar signatures. Selection of a particular radar threat to be simulated is entered by an operator via thumbwheel switches located on the front panel of the simulator. The portable radar simulator simulates such radar parameters as jitter, stagger, frequency hop, simple and complex scans, pulse repetition intervals and frequency pulse widths.
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Citations
15 Claims
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1. A digital radar simulation system for simulating up to 2048 pre-programmed radar signatures, said digital radar simulation system comprising:
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thumbwheel switching means for providing a plurality of digital logic signals, said digital logic signals being representative of 2048 pre-programmed radar signatures said digital radar simulation system simulates, said thumbwheel switching means upon being set to one of the 2048 radar signatures to be simulated providing the most significant bits of the digital address indicative of said radar signature; sequencing means for providing the least significant bits of said digital address indicative of said radar signature being simulated; memory means for storing said 2048 radar signatures therein, said memory means in response to the address supplied by said thumbwheel switching means and said sequencing means providing an eight bit control word, a pair of pulse repetition interval data words, a plurality of lobe data words and a plurality of scan data words for the radar signature being simulated; control register means for receiving said eight bit control word and storing said control therein while said radar signature is being simulated; the first and second bits of said control word representing a pulse width for the radar signature being simulated; pulse repetition interval generating means for receiving a pair of eight bit data words from said memory means, said first eight bit data word being the least significant bits of said pulse repetition interval and said second eight bit data word being the most significant bits of said pulse repetition interval; said pulse repetition interval generating means, responsive to said first and second data words generating a pulse repetition interval for the radar signature being simulated; jitter generating means for receiving the third, fourth and fifth bits of said control word and in response to the third, fourth and fifth bits of said control word providing either a sixty four microsecond shortened time period for ever other pulse repetition interval generated by said pulse repetition generating means or a one hundred twenty eight microsecond shortened time period for every other pulse repetition interval generated by said pulse repetition generating means; beamwidth and scan generating means for generating a beamwidth and side lobes for the radar signature being simulated in response to the lobe data words supplied thereto by said memory means, said lobe data words being indicative of the beamwidth and side lobes of the radar signature being simulated; said beamwidth and scan generating means generating a scan and scan period for the radar signature being simulated in response to the scan data words supplied thereto by said memory means; frequency hop generating means for generating a frequency hop within the radar signature being simulated by said digital radar simulation system, said frequency hop being generated by said frequency hop generating means in response to the sixth bit of said control word; and output circuit means for receiving the seventh and eight bits of said control word, for providing in response to the seventh bit of said control word a direct scan radar signature and for providing in response to the eight bit of said control word a pulse group within the radar signature being simulated and for gating the pulse repetition interval, the frequency hop, the beamwidth, side lobes, scan and scan period into the radar signature being simulated by said digital radar simulation system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A digital radar simulation system for simulating up to 2048 pre-programmed radar signatures, said digital radar simulation system comprising:
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timing circuit means for providing a first clock signal, a second clock signal, a third clock signal, a fourth clock signal, a fifth clock signal and a sixth clock signal; thumbwheel switching means for providing a plurality of digital logic signals, said digital logic signals being representative of 2048 pre-programmed radar signatures said digital radar simulation system simulates, said thumbwheel switching means upon being set to one of the 2048 radar signatures to be simulated providing the most significant bits of the digital address indicative of said radar signature; sequencing means for providing the least significant bits of said digital address indicative of said radar signature being simulated; memory means for storing said 2048 radar signatures therein, said memory means in response to the address supplied by said thumbwheel switching means and said sequencing means providing an eight bit control word, a pair of pulse repetition interval data words, a plurality of lobe data words and a plurality of scan data words for the radar signature being simulated; said memory means not providing said lobe data words and said scan data words when the radar signature being simulated by said digital radar simulation system is a direct scan radar signature; control register means for receiving said eight bit control word and storing said control word therein while said radar signature is being simulated; said sequencing means receiving said first clock signal and responsive to said first clock signal providing sequentially a control word signal, a pulse repetition interval signal and alternatively a plurality of lobe word signals and a plurality of scan word signals; said control word pulse latching the eight bit control word into said control register means; the first and second bits of said control word representing a pulse width for the radar signature being simulated; pulse repetition interval and jitter generating means for receiving a pair of eight bit data words from said memory means, said first eight bit data word being the least significant bits of said pulse repetition interval and said second eight bit data word being the most significant bits of said pulse repetition interval, said pulse repetition interval and jitter generating means, responsive to said first and second data words generating a pulse repetition interval for the radar signature being simulated; said pulse repetition interval and jitter generating means receiving the third, fourth and fifth bits of said control word and in response to the third fourth and fifth bits of s id control word providing a sixty four microsecond shortened time period for every other pulse repetition interval generated by said pulse repetition generating means, a one hundred twenty eight microsecond shortened time period for every other pulse repetition interval generated by said pulse repetition generating means, or a complete pulse repetition interval for two cycles followed by a sixty four microsecond shortened time period pulse repetition interval for one cycle and a one hundred twenty eight microsecond shortened time period pulse repetition interval for the next cycle; beamwidth and scan generating means for generating a beamwidth and side lobes for the radar signature being simulated in response to the lobe data words supplied thereto by said memory means, said lobe data words being indicative of the beamwidth and side lobes of the radar signature being simulated; said beamwidth and scan generating means generating a scan and scan period for the radar signature being simulated in response to the scan data words supplied thereto by said memory means; frequency hop generating means for generating a frequency hop within the radar signature being simulated by said digital radar simulation system, said frequency hop being generated by said frequency hop generating means in response to the sixth bit of said control word; and output circuit means for receiving the seventh and eight bits of said control word, for providing in response to the seventh bit of said control word a direct scan radar signature and for providing in response to the eight bit of said control word a pulse group within the radar signature being simulated and for gating the pulse repetition interval, the frequency hop, the beamwidth, side lobes, scan and scan period into the radar signature being simulated by said digital radar simulation system. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification