Continuous wave wideband precision ranging radar

Communications: directive radio wave systems and devices (e.g. – Determining distance – With pulse modulation

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342145, 342 70, G01S 1334

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active

057317810

ABSTRACT:
A precision ranging radar system for use in parking and backup maneuvers by drivers of vehicles to avoid collisions. The radar system includes a noise code generator for generating a noise code, a data source for generating a data bit stream, and a local oscillator microwave source. A data mixing mechanism is coupled to the noise code generator and data source for embedding data derived from the data source into the noise code. Transmit and receive microwave antennas are provided. A transmit phase modulator is coupled to the data mixing mechanism, the local oscillator microwave source, and the transmit antenna. A receive phase modulator is coupled to the local oscillator microwave source, and a code delay unit is coupled to the noise code generator and the receive phase modulator. A downconverter mixer is coupled to the receive microwave antenna and to the receive phase modulator, and a baseband integrator and amplifier is coupled to the downconverter mixer for outputting data from the radar system.

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Principles of Communication System. By Herbert Taub and Donald L. Schilling. Chapter Seventeen--Spread Spectrum Modulation pp. 720-729.
1992 IEEE MTT-S International Microwave Symposium Digest. "Millimetre Wave Radars for Automotive Applications," by D. A. Williams. pp. 721-724.

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