mashhur
Member level 5
cyclic prefix
Hi all members!
I want to ask about cyclic prefix and guard period. What is the difference between them?
Among the symbols OFDM usually use cyclic prefix and some tutorials show it is equal to guard period, however, other books explain them in different. So, unfortunately I couldn't get the main distinguish argue.
Could somebody help me?
Thanks in advance!
Added after 4 hours 6 minutes:
Ok, finally I found the answer for my question myself. If it involves, somebody can find out :
The cyclic prefix, which is transmitted during the guard interval, consists of the end of the OFDM symbol copied into the guard interval, and the guard interval is transmitted followed by the OFDM symbol. The reason that the guard interval consists of a copy of the end of the OFDM symbol is so that the receiver will integrate over an integer number of sinusoid cycles for each of the multipaths when it performs OFDM demodulation with the FFT.
Hi all members!
I want to ask about cyclic prefix and guard period. What is the difference between them?
Among the symbols OFDM usually use cyclic prefix and some tutorials show it is equal to guard period, however, other books explain them in different. So, unfortunately I couldn't get the main distinguish argue.
Could somebody help me?
Thanks in advance!
Added after 4 hours 6 minutes:
Ok, finally I found the answer for my question myself. If it involves, somebody can find out :
The cyclic prefix, which is transmitted during the guard interval, consists of the end of the OFDM symbol copied into the guard interval, and the guard interval is transmitted followed by the OFDM symbol. The reason that the guard interval consists of a copy of the end of the OFDM symbol is so that the receiver will integrate over an integer number of sinusoid cycles for each of the multipaths when it performs OFDM demodulation with the FFT.