This is a good paper on that topic: arxiv.org/pdf/1810.03961.pdf The RIS videos on this channels are only considering single-user channels, since they focus on the fundamentals.
When two base stations collaborate, they can jointly receive twice the number of user signals with manageable interference. If each base station has a single antenna and serves one user, then it will receive its own user’s signal plus interference from the other user, and it doesn’t have any means to separate them. If the two base stations cooperate, they have two antennas in total, and these antennas receive a mix of the two users’ signals. By solving a linear systems of equations, the base stations can then separate the two signals.
Very interesting video professor, Could you tell me the formula of FNBW for nonlinear array, i know for linear it is equal to 2*arcsin(lambda/L) but i thing for nonlinear ( different amplitude elements with same phase shift) is different is it right?because when i changed the amplitude and kept the distance btwn the elements constant(lambda/2) the FNBW already changed
Yes, the beamwidth will change in that case, but I’m not sure if there is a simple formula it. You have to derive it yourself, analytically or numerically.
Thanks about this video .
Can you tell me how to make the capacity of RIS multiuser channel?
This is a good paper on that topic: arxiv.org/pdf/1810.03961.pdf
The RIS videos on this channels are only considering single-user channels, since they focus on the fundamentals.
Interesting talk Prof,
How can cell free network enable interference mitigation within the network since the network is congested with many antennas?
When two base stations collaborate, they can jointly receive twice the number of user signals with manageable interference. If each base station has a single antenna and serves one user, then it will receive its own user’s signal plus interference from the other user, and it doesn’t have any means to separate them. If the two base stations cooperate, they have two antennas in total, and these antennas receive a mix of the two users’ signals. By solving a linear systems of equations, the base stations can then separate the two signals.
Very interesting video professor,
Could you tell me the formula of FNBW for nonlinear array, i know for linear it is equal to 2*arcsin(lambda/L) but i thing for nonlinear ( different amplitude elements with same phase shift) is different is it right?because when i changed the amplitude and kept the distance btwn the elements constant(lambda/2) the FNBW already changed
Yes, the beamwidth will change in that case, but I’m not sure if there is a simple formula it. You have to derive it yourself, analytically or numerically.