System for the remote display of output data of at least one radar

• US 5,357,255 A
• Filed: 04/21/1993
• Issued: 10/18/1994
• Est. Priority Date: 06/18/1992
• Status: Expired due to Fees

• Current Assignee: Sopelem-Sofretec
• Original Assignee: Sopelem-Sofretec
• Inventors: Giraudy, Bernard C.
• Primary Examiner(s): Sotomayor, John B.
• Application Number:
  US08/050,885
• Time in Patent Office: 545 Days
• Field of Search: 342/58, 342/176, 342/185, 342/55, 342/197
• US Class Current: 342/58
• CPC Class Codes: G01S 7/003 Transmission of data between radar, sonar or lidar systems and remote stations
• CPC Class Codes: G01S 7/298 Scan converters

Abstract

This system for displaying data on a display unit comprising a television screen associated with a videographic memory, the data containing at least one videographic signal and scanning data, a pre-processing unit for reel time programming the output data of the radar, a threshold unit for thresholding the videographic signal from its background noise, and a digitizer circuit for digitizing the videographic signal after thresholding, a compression circuit for space-time compressing the videographic signal after digitization, a transmission device for proprietary serial data transmission of the scanning data, of the compressed videographic signal and of compression data, to the television display assembly unit, which comprises a decompression unit for decompressing the videographic signal and a converter unit for converting the standard of the coordinates of the data contained in this signal, from a polar coordinates into a Cartesian coordinates with the aid of the compression and scanning data, and control device for controlling the contents of the memory in cooperation with an after glow processor, for controlling certain zones of videographic memory according to a mathematical treatment formula, and generating a complete image of the radar output.

Claims

1. A system for remote display of radar output data on a remote television display assembly unit comprising a television monitor associated with a videographic memory, said data containing at least one videographic signal and scanning data, said system comprising in combination:

pre-processing means for processing different radar output data in real time, said pre-processing means receiving additional input from an analog test pattern generator, said pre-processing means being connected to a thresholding circuit means;

said thresholding circuit means being adapted to partially or completely threshold background noise of said videographic signal received at its input, said thresholding circuit means being connected to a digitizer circuit means;

said digitizer circuit means, digitizing said videographic signal after thresholding, being connected to space-time compression means effecting space-time compression of said digitized videographic signal, containing real time data and background noise, said space-time compression being connected to FIFO memory means;

said FIFO memory means, storing in real time said digitized compression videographic signal, being connected to transmission means;

said transmission means, transmitting in real time in a proprietary serial format said scanning data and compressed videographic signal to said remote television display assembly unit;

said remote television display assembly unit comprising transmission receiver means for receiving data from said transmission means, said remote television display assembly unit including a real time videographic decompression circuit means for decompressing said compressed videographic signal, said videographic decompression circuit means being connected to converter means;

said converter means for converting said videographic signal data entered in polar coordinates into cartesian coordinates,

said conversion performed with the aid of compression and scanning data;

said converter means being connected to control means;

said control means controlling the content of said videographic memory associated with said television monitor display to control said videographic memory as a function of videographic signal and scanning data, permitting display of a complete image of said radar data;

said control means being connected to after glow processor means;

said after glow processor means controlling certain zones of said videographic memory in accordance with a mathematical treatment formula, writing to said videographic memory, through multiplexer means disposed therebetween;

said multiplexer means further receiving data from radar input for display in real time of a complete radar image with a determined background noise level.

2. A system according to claim 1, wherein said pre-processing means is adapted to process scanning data comprising, synchronization, passing through North and increment radar data.

3. A system according to claim 1, wherein said space-time compression circuit means compresses data in respect of spatial merging parameter (M) and time merging parameter (N) for storage in FIFO memory prior to transmission.

4. A system according to claim 1, wherein said transmitting means comprise HF microwave means for transmissin of complete background noise and receiving means.

5. A system according to claim 1, wherein said transmission means comprises FIFO type memory and a real time proprietary digital serial data format transmitter.

6. A system according to claim 1, wherein said transmission means permits partial transmission of the background noise through a wire connection.

7. A system according to claim 1, wherein said transmission means permits complete transmission of the background noise through said wire connection.

8. A system according to claim 1, wherein said transmission means comprise HF microwave means for transmission of partial background noise and receiving means.

9. A system according to claim 1, wherein said control means for controlling the contents of said videographic memory comprise said after glow processor means for processing the contents of certain zones of said videographic memory in accordance with a mathematical treatment formula, so as to produce a phenomenon of pseudo-after glow of certain points of the radar image displayed on said television monitor screen.