Is there any good literature or demonstrations I can look into?
Hello,
I'm just trying to get my head around what the raw carrier of a QPSK signal looks like. I understand the theory about moving the phase to represent different messages. The output waveform has very sharp breaks at symbol transitions. The wave just stops and moves 90*, for example.
Is this signal with the sharp transitions literally just sent onto an antenna and over the air? Or is there another step where the signal is convolved to create a radio wave suitable for transmission?
Thanks
I am getting a bit lost while reading about it in other texts and needed a good base understanding of whats going on before I can continue.
I have to do a 10 to 15 presentation on it in a couple of weeks, but I don't think I really understand it yet. I've looked it up and seen a lot of math and waves, which is all well and good, but it's can someone break it down for me like I'm a child please?
Hey guy, I’m looking at BASK, BFSK, BPSK, and QPSK right now for class. My teacher sucks, and I was hoping someone could provide a resource that discusses both the math and simulink models of each in tandem.
I can understand the math (despite our teacher not really going over it), but beyond the basic block representation we have never gone into detail about the simulink models or what parts of the math they are doing. (She shows us a diagram consisting of about 4-6 blocks for modulating the signals and then when we go to implement it ourselves we have to scour outside of class resources to figure out which 10-15 blocks we ACTUALLY need. I.e. she shows us a schematic with a block titled “phase shift” but that doesn’t actually exist in simulink and we waste hours finding an article that discusses how a delay block is used in conjunction with other blocks to accomplish phase shifting.)
2 cos (3x - pi/4) = sqrt(3)
I know we divide both sides here by 2 but I'm stuck after that. Do you take the arcos of both sides (as long as the domain's right for the left side) to cancel the left side out?
According to Barkhausen stability criterion, the system will be unstable due to n360° degree phase shift. But when calculating gain margin with Bode diagram, they will look for -180°. Why? Some said that it will shift positive feedback to negative feedback?
So, I noticed that when I phase shift or jump at all, that my game messes up. I unplugged and restarted my router thinking it's the internet but nah. Is this a new bug, occurring bug, or what?
Both bloodlusted, john isn't allowed to copy arlos ability
