Patent ID: 11914068
Assignee: TAIYUAN UNIVERSITY OF TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 6:
7. A method for ranging by a radar ranging system based on a true random generator is provided, comprising:
Step 1, an external clock source (2) generates a carrier signal through a frequency multiplier (4), and at the same time, the external clock source (2) transmits the clock signal to a true random generator (1);
Step 2, the true random generator (1) generates a true random binary sequence according to the clock signal and stores the true random binary sequence in a memory (3);
Step 3, the carrier signal generated in Step 1 is input into a BPSK phase modulator (7) through a power splitter (5), and at the same time the true random binary sequence stored in the memory (3) in Step 2 is input into the BPSK phase modulator (7) for phase modulation of the carrier signal;
Step 4, the phase-modulated carrier signal passes through a power amplifier (9) and is transmitted to the measured object via an transmitting antenna (10), and the transmitted signal, after being reflected, is received through a receiving antenna (14);
Step 5, the reflected signal, after being received, is used as a received signal to improve the signal-to-noise ratio through a low-noise amplifier (12), and then is used as a radio frequency signal to be input into a mixer;
Step 6, the down-sampling unit down samples the intermediate frequency signal generated by the mixer, the sampled analog signal is converted into a digital signal through an analog-digital converter (16), and the digital signal is cross-correlated with the true random binary sequence in the memory (3) to obtain the distance between the object reflecting the signal and the radar ranging system.