I am a beginner who is learning about DVB-T. I noticed a difference in the examples provided by the official source and I am confused about it.
What is the principle behind doing it this way?Thanks a lot!
EDIT 1: Sorry, my previous description of the problem was not detailed enough. In my opinion, there should be a IFFT block before OFDM Cyclic Prefixes block in dvbt_tx_8k.grc, which corresponds to FFT block behind OFDM Symbol Acquisition block in dvbt_rx_8k.grc, in order to achieve correct demodulation. However, in fact, signal transmission can only be successful when there is no FFT block in dvbt_tx_8k.grc. Otherwise, errors will occur, which confuses me.
Both files(dvbt_tx_8k.grc and dvbt_rx_8k.grc) can be found at