Okay Marcus, I thought it would appear on the mailing list as well, my bad.
I am starting to understand how my program is supposed to work. Binary file --> Symbols --> Waveforms I have no idea on which blocks do this kind of conversions. Still, I don't have the theoretical basis to understand this. I will focus on understanding how this works, and then look for the blocks I need. Best regards, Rodrigo El mié, 14 jul 2021 a las 13:13, Marcus Müller (<mmuel...@gnuradio.org>) escribió: > Hi Rodrigo, > > please always have the mailing list in CC: (or directly reply to the > mailing list), so > that the others see you didn't get lost :) > > On 14.07.21 13:06, Rodrigo Ruiz wrote: > > I will try to explain myself a bit better. I want to send a file using > the LimeSDR, but > > first I need to use a NRZ codification or something similar and modulate > it. > > "Or something similar": yes, you'll need to do something different. NRZ > solves zero > problems, and doesn't yield a waveform that can sensibly transmitted and > then later > received on its own. This is a bit like you saying "I want to design a > car, with a sturdy > shaft where I affix the oxes that draw it": > you're mixing technology that only applies to wired communication with > those for wireless > communication. Sure, your car can have oxes, but these oxes will not be > drawing the car, > because then it would not be a car. Your car would probably be better > without the oxes, > and something else instead. > > > After this, I will configure the LimeSDR Tx block to transmit that file > to a certain > > frequency. > > Ah but an SDR doesn't transmit "files", it transmits discrete-time > waveform samples. Your > GNU Radio flowgraph's job is to transform the data in the file into > symbols, these into > waveforms, and *then* they can be transmitted. > > > Then with another LimeSDR, the idea is to do the opposite process to get > the > > original file. > > Exactly, so the flow graph at the receiver needs to take the waveform it > gets from the > limesdr (which has absolutely no idea of what kind of transmission you > have), and analyze > it such that it sees the symbols that your transmitter put into a > waveform, and gets the > data bits they corresponded to! > > > I will keep studying and let you know about my progress. > > Great! > Best regards, > Marcus >
