In OFDM Modulator Block , in Mapper Sub-block , in path of : ./lib/digital_ofdm_mapper_bcv.
cc
1- I saw the following comment inside the code : " Eventually, we will get rid of the occupied_carriers concept. " , the question how you get rid of the occupied carriers concept in the code and why ? . as i see the code depends strongly on this concept .
2- Why the concept of occupied carriers is used and why filling only part of FFT size not all of it ?
3-Inside the code , string carriers = "FE7F" . I have two questions here , the first is , when converting to bits : 1111111001111111 , why there is two zeros at DC instead of one zero only ?
The second question is , you started with "FE7F" . Why didn't you start with "E7" and then pad F's from both sides (looping) as you did later !?
4- Also , for the following segment of the code : diff = (d_occupied_carriers - 4*carriers.length()) . Why you are multiplying by four instead of eight when converting from Character Domain to Bit Domain ? or you deal with them as HEX only ?
5- What is the maximum packet size ?
6- What is the difference between the word "coming message" and " packet" . Are they the same thing ? or Does one message contain more than one packet ?
Another Question in OFDM_frame_sink , what is the meaning of the parameter d_dfe ?
Thanks in-advance
![]()
1- I saw the following comment inside the code : " Eventually, we will get rid of the occupied_carriers concept. " , the question how you get rid of the occupied carriers concept in the code and why ? . as i see the code depends strongly on this concept .
2- Why the concept of occupied carriers is used and why filling only part of FFT size not all of it ?
3-Inside the code , string carriers = "FE7F" . I have two questions here , the first is , when converting to bits : 1111111001111111 , why there is two zeros at DC instead of one zero only ?
The second question is , you started with "FE7F" . Why didn't you start with "E7" and then pad F's from both sides (looping) as you did later !?
4- Also , for the following segment of the code : diff = (d_occupied_carriers - 4*carriers.length()) . Why you are multiplying by four instead of eight when converting from Character Domain to Bit Domain ? or you deal with them as HEX only ?
5- What is the maximum packet size ?
6- What is the difference between the word "coming message" and " packet" . Are they the same thing ? or Does one message contain more than one packet ?
Another Question in OFDM_frame_sink , what is the meaning of the parameter d_dfe ?
Thanks in-advance