lower reach of the waves and more distance related issues
multiple antennas beamforming
How to detect position of users
hybrid beamforming
Needs for high precision positionning
More dense network
Phase noise
300ghz
a
Energy Transfer and Harvesting
Very lowpower communications is especially required in Internet-ofThings (IoT) nodes with non-replaceable batteries
Needs for Small transfer with massive number of users
New modulation schemes
FBMC
Rate multiplexing ?/RSMA?
c1a
Seems to be lobbied ?
good results in papers
SDMA
SDMA based on MU–LP
r
Although MU–LP is suboptimal for the multi-antenna BC, it achieves a near-capacity performance when CSIT is perfect and the user channels are nearly orthogonal with similar channel strengths or similar long-term signal-to-noise ratios (SNRs) [8]. SDMA based on MU–LP1 is therefore an integral part of numerous 4G and 5G transmission schemes such as multi-user MIMO (MU–MIMO), networked MIMO, coordinated multi-point (CoMP), massive MIMO, and millimeterwave (mmWave) MIMO. Linear precoding schemes, such as zero-forcing beamforming (ZFBF) [8], minimum mean square error (MMSE), regularized ZFBF (R-ZF) [6], block 1 In the rest of the paper, for simplicity, we use “SDMA” when we want to refer to “SDMA based on MU–LP”. 4 diagonalization (BD) [9], maximum ratio transmission (MRT) [10], and maximum signal-to-leakage-and-noise ratio (SLNR) transmission [11] have been extensively used in practicalhttps://arxiv.org/pdf/2201.03192.pdf
Massive mimo, spacial multiplexing
Need to manage a lot of device peper m2
NOMA
c1a
Main use is power domain NOMA
Main examples are for 2 or 4 users
Fucked up with mimo. The way noma is interesting in mimo situation is when we have multiple users at the same time in the Line of sight of the antenna. In this case, the multiple antennas acts like a single one and NOMA can be better in this case
In downlink NOMA, a user doesn’t need to know the channel of anyone else since all signals reach the user over the same channel. However, the user must know the modulation and coding scheme of the co-users.
