Hi!A single OFDM symbol has 64 carriers. I can only guess you're using the configuration of OFDM Carrier Aggregator that gives you 48 carriers dedicated to data.
On each of these carriers, you do QPSK, so 2 bit per symbol. That makes for a total of 96 bits, in a single OFDM symbol.
96 bits are 12 Bytes. "hello world" has 11 Bytes. So, you're not even filling a single OFDM symbol with data!
But you're even setting a frame length of 96 bytes. So, this can't work; you need to give the transmitter enough data to fill a frame.
Best regards, Marcus On 28/10/2021 10.59, 能书能言 wrote:
Hello everyone,I am using ofdm_tx/rx.grc to transfer text file data, and there is a "hello world" character in the text. I use two usrpb210 for transmission .When I set the "repeat" in the "file sink" to no, the receiving end cannot receive the correct "hello world" word, and the open file is blank; but when I set the "repeat" to yes, the receiving file is opened , Which contains a lot of repeated "hello world" words, I want to know why this happens? How can I solve this problem? (It can still be received correctly when my "repeat" is set to no)The flowchart is in the attachment. Thanks to anyone for the relevant information, thank you! Sincerely
smime.p7s
Description: S/MIME Cryptographic Signature
