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

Claim 0:
1. A radar ranging system based on a true random generator, comprising a radar signal modulation and transmission unit and a radar signal receiving and processing unit, wherein the radar signal modulation and transmission unit includes a true random generator (1), the true random generator (1) generates a true random binary sequence that is input and stored in a memory (3), and the memory (3) cyclically outputs the true random binary sequence to a BPSK modulator (7);
The BPSK modulator (7) uses the true random binary sequence to phase-modulate a carrier signal, and the phase-modulated carrier signal passes through a power amplifier (9) and is transmitted by an transmitting antenna (10);
The carrier signal is a radar signal generated by an external clock source (2) through a frequency multiplier (4) and a power splitter (5);
The radar signal receiving and processing unit includes a receiving and amplifying unit, a down-sampling unit and a data processing unit, wherein the receiving and amplifying unit includes a low-noise amplifier (12) and a receiving antenna (14), the receiving antenna (14) receives the reflected radar signal, and the reflected radar signal has its signal-to-noise ratio improved by the low-noise amplifier (12) and is input into a first mixer (11) and a second mixer (13) as a radio frequency signal;
Local oscillator (LO) signals of the first mixer (11) and the second mixer (13) are orthogonal signals generated by the carrier signal generated by the power splitter (5) through a multiphase filter (6);
The down-sampling unit includes a first sample-and-hold circuit module (15), a second sample-and-hold circuit module (17), a frequency divider (19) and a sampling clock generator (20), wherein the down-sampling unit divides the clock signal of the external clock source (2) by the frequency divider (19) and then inputs the signal into the sampling clock generator (20); an output signal of the sampling clock generator (20) down samples the intermediate frequency signals generated by the first mixer (11) and the second mixer (13);
The data processing unit includes an analog-digital converter (16), and the analog-digital converter (16) converts the sampled analog signal into a digital signal that is cross-correlated with the true random binary sequence in the memory (3), so as to obtain the distance between the object reflecting the signal and the radar ranging system.