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

Claim 7:
8. The method for ranging by the radar ranging system based on the true random generator according to claim 7, wherein:
The carrier signal in Step 1 is calculated by the formula: Sc(t)=ac cos(ωct), where ac is the amplitude of the carrier signal, ωc is the period of the carrier, ωc=2πfc, and fc is the frequency of the carrier signal;
The transmitted signal in Step 4 is calculated by the formula: STX(t)=m(t)aTX cos(ωct), where aTX is the amplitude of the transmitted signal after passing through the power amplifier (9), m(t) is the true random binary sequence,, m
   ⁡
   (
   t
   )
  
  =
  
   {
   
    
     
      
       1
      
      
       
        corresponding
        ⁢
           
        code
        ⁢
           
        element
        ⁢
           
        is
        ⁢
        
          
           
        
        ⁢
        1
       
      
     
     
      
       0
      
      
       
        corresponding
        ⁢
           
        code
        ⁢
           
        element
        ⁢
           
        is
        ⁢
        
          
           
        
        ⁢
        0
       
      
     
    
    ;
   
  
 

The received signal in Step 5 is calculated by the formula: STX(t)=m(t−τ0)αaTX cos(ωc(t−τ0)+θR), where τ0 is the delay time of the signal from transmission to reception, a is the damping factor of signal loss due to the path and reflection, and θR is the extra phase shift caused by reflection;
The intermediate frequency signal generated by the mixer in Step 6 is calculated by the formula:

SlF(t)=½αaTXaLOm(t−τ0)·exp(j(ωcτ0−θR))

In the above formula, aLO is the amplitude of the LO signal.