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Original question:

AWR1642: What is the difference between peakVal of detectedObj and relative power of original mmwaveSDK?

AWR1642: Is it possible to obtain the relative power from a detected object with the SRR demo ?

user5836779
Prodigy 200 points
Part Number: AWR1642

Hi,

I'm using the AWR1642 SRR(short range) code, but I can extract only the following informations : 

- Doppler Index,

- Peak Value,

- X range,

- Y range.

But the Peak Value is just the peak of the 'angle FFT'.

Is there a formula to convert peakValue to RelativePower in dB ? Otherwise, how I can obtain the RelativePower ?

Thanks.




								


				
				

				
			

		

			
						
									
                			    			                        
						
						
			
			
						
			                        
			
			
				
			  
			

			     
			

		


				    			

						
















	

	

					
    
	
    





		
	
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                          TI__Mastermind
                        24955 points
                      
    
                          
                   		
		
    
					
    'peakVal' of a detected object denotes the 'relative' received power due to that detected object. You can use it to estimate the relative RCS of different targets  using the radar-equation. 
    

    
For example, if you have a corner-reflector of a known RCS, you can note down the 'peakVal' for that corner-reflector, and then estimate the RCS of other reflectors in a given scene. This assumes the antenna gain is constant for the two measurements.
    

    
You can also use the 'peakVal' to get an estimate of the 'true' received power.
    

    
For example, if you'd like to convert the peakValue to mW value (a power reading). In this case, you'd have to 'de-embed' a lot of parameters, including things like the FFT processing gain (over range-FFT, doppler-FFT, and angle-FFT), the rx-gain, the DFE-gain etc. Then,  with an estimate of the received power, you can apply the 'Radar Equation' and get an estimate of the RCS of a target.
    

    
Regards,
    
Kyle
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    

	            
                 	
	
    
				
		                
                
                
                
                
                
                
        		
		
				
    
			
		
    
		
		 
		
		
     
    
	
    

    
			
    
			
    
		
    

		
    
	
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