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Request for Assistance with CFR Pulse File and Threshold Settings for BW 50MHz 5GNR Signal

		
	
				

			

									
					    PaulJung
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Jul 15, 2024 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Software

    		        		            		    
Product Number:  ADRV9029  

    		        		        		        
Software Version: SW6.4.0.19

    		    		    

		    		    
		    			

			    
Hello ADI team,


Based on your advice regarding the question below, I applied a BW 50MHz 5GNR signal at a Tx data rate of 122.88Msps.


 RE: Inquiry Regarding DPD Usage with Tx Data Rate Below 122.88MSPS 


I created and used the attached CFR Pulse file for the test.







    

        Fullscreen
        CFR_pulse_50M_30k_122p88_osr1.txt
        Download
    

    
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
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1 0
1 0
0 0
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0 0
1 0
1 0
0 0
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1 0
2 0
0 0
-3 0
-2 0
2 0
4 0
1 0
-4 0
-4 0
2 0
5 0
2 0
-4 0
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7 0
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0 0
8 0
6 0
-5 0
-10 0
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10 0
9 0
-5 0
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-4 0
11 0
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-7 0
12 0
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-1 0
-18 0
-12 0
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7 0
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29 0
13 0
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33 0
19 0
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-8 0
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-29 0
36 0
55 0
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31 0
65 0
12 0
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73 0
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89 0
76 0
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89 0
95 0
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-54 0
84 0
114 0
-9 0
-125 0
-78 0
76 0
133 0
13 0
-129 0
-103 0
63 0
151 0
39 0
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69 0
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146 0
293 0
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69 0
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44 0
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-129 0
39 0
151 0
63 0
-103 0
-129 0
13 0
133 0
76 0
-78 0
-125 0
-9 0
114 0
84 0
-54 0
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-26 0
95 0
89 0
-32 0
-107 0
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76 0
89 0
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25 0
73 0
25 0
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12 0
65 0
31 0
-41 0
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1 0
55 0
36 0
-29 0
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-8 0
46 0
37 0
-19 0
-48 0
-14 0
36 0
37 0
-10 0
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-19 0
27 0
36 0
-2 0
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-21 0
19 0
33 0
3 0
-29 0
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13 0
29 0
7 0
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7 0
25 0
10 0
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-20 0
2 0
21 0
11 0
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-1 0
16 0
12 0
-7 0
-16 0
-3 0
12 0
11 0
-4 0
-13 0
-5 0
9 0
10 0
-2 0
-10 0
-5 0
6 0
8 0
0 0
-8 0
-5 0
4 0
7 0
1 0
-5 0
-4 0
2 0
5 0
2 0
-4 0
-4 0
1 0
4 0
2 0
-2 0
-3 0
0 0
2 0
1 0
-1 0
-2 0
0 0
1 0
1 0
0 0
-1 0
0 0
1 0
1 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0








The results are shown in the image below (iBW 50MHz, TM1.1).


 


  


Looking at the image above, could you advise whether there is an issue with the CFR Pulse file or with the CFR threshold? Any suggestions would be appreciated.


Additionally, I set the OSR to 1, but could you also let me know how to use the OSR for DPD? Thank you.


If there is an issue with the CFR Pulse file, could you generate a new CFR Pulse file and send it to me?


    

  • BW 50MHz (CF +/-25MHz)
    • 

  • SCS 30KHz
    • 

  • Data rate 122.88Msps
    • 



Please let me know if you need any additional information regarding my request.


Thanks,
Paul

			

			
									    

			        
Edit Notes

    				..

[edited by: PaulJung at 2:45 AM (GMT -4) on 16 Jul 2024]
				

						
		                             
                        

    

                                            
                 software
                
                                                    
                 SW6.4.0.19
                
                                                    
                 ADRV9029
                
                                                    
                 cfr-pulse-generation
                
                                                    
                 dpd
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
                    Show More
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			








	
	
	
	



Parents
	
    
	

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Jul 16, 2024 12:45 AM
            
            
						
			            		
    
		
										0
					
	
    

		
		
    
		
    
                                
                                                            
    
					
    PaulJung said:
    Looking at the image above, could you advise whether there is an issue with the CFR Pulse file or with the CFR threshold? Any suggestions would be appreciated.
    

    Are you getting the expected PAR? It looks like the ACLR was degraded, are you using Hard clipper?, if so, the Hard clipper threshold should be <= CFR peak threshold.
    

    What is the ACLR and PAR before applying CFR? What is the RMS signal level and peak threshold used?
    

    Have you configured OSR of 1 in CFR configuration as well?
    

    I have generated the pulse with 122.88xosr 4 for NR50MHz. Please configure accordingly and test for CFR.
    

    



    
    
    
        Fullscreen
        3223.NR50M_pulse_122P88Mxosr4.txt
        Download
    
    
    
    2 0
4 0
7 0
12 0
17 0
23 0
29 0
36 0
43 0
49 0
54 0
57 0
58 0
57 0
53 0
46 0
37 0
25 0
12 0
-2 0
-16 0
-30 0
-42 0
-51 0
-57 0
-59 0
-57 0
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-42 0
-28 0
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4 0
20 0
36 0
48 0
58 0
63 0
63 0
58 0
48 0
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43 0
58 0
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71 0
63 0
50 0
32 0
11 0
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57 0
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92 0
98 0
95 0
83 0
63 0
37 0
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55 0
16 0
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83 0
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135 0
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174 0
169 0
149 0
114 0
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11 0
79 0
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219 0
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137 0
73 0
1 0
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44 0
131 0
207 0
264 0
297 0
301 0
278 0
227 0
154 0
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30706 0
32245 0
    

    


    

    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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Reply

    


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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Jul 16, 2024 12:45 AM
            
            
						
			            		
    
		
										0
					
	
    

		
		
    
		
    
                                
                                                            
    
					
    PaulJung said:
    Looking at the image above, could you advise whether there is an issue with the CFR Pulse file or with the CFR threshold? Any suggestions would be appreciated.
    

    Are you getting the expected PAR? It looks like the ACLR was degraded, are you using Hard clipper?, if so, the Hard clipper threshold should be <= CFR peak threshold.
    

    What is the ACLR and PAR before applying CFR? What is the RMS signal level and peak threshold used?
    

    Have you configured OSR of 1 in CFR configuration as well?
    

    I have generated the pulse with 122.88xosr 4 for NR50MHz. Please configure accordingly and test for CFR.
    

    



    
    
    
        Fullscreen
        3223.NR50M_pulse_122P88Mxosr4.txt
        Download
    
    
    
    2 0
4 0
7 0
12 0
17 0
23 0
29 0
36 0
43 0
49 0
54 0
57 0
58 0
57 0
53 0
46 0
37 0
25 0
12 0
-2 0
-16 0
-30 0
-42 0
-51 0
-57 0
-59 0
-57 0
-51 0
-42 0
-28 0
-13 0
4 0
20 0
36 0
48 0
58 0
63 0
63 0
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34 0
18 0
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4 0
24 0
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68 0
73 0
71 0
63 0
50 0
32 0
11 0
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0 0
24 0
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3 0
32 0
57 0
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7 0
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219 0
230 0
219 0
187 0
137 0
73 0
1 0
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64 0
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-279 0
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-131 0
-46 0
44 0
131 0
207 0
264 0
297 0
301 0
278 0
227 0
154 0
65 0
-31 0
-126 0
-210 0
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-313 0
-235 0
-133 0
-17 0
103 0
214 0
306 0
371 0
400 0
392 0
346 0
267 0
160 0
37 0
-91 0
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-382 0
-302 0
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78 0
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45 0
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523 0
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