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5G: What is beam forming and how it is better than LTE radio access mechanism ?

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I want to understand beam forming concept and why it is considered for 5G ?

posted Jan 9, 2018 by Harshita

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2 Answers

+1 vote

Hi,

Beam forming is nearly same as multi user MIMO in LTE, each antenna is dedicated to an set of UE's but major difference between beam forming and multi user MIMO is selecting the antenna which is apt for the UE to utilize resource effectively.
instead of making antenna to focus around the cell focusing only to an particular UE group such that those UE will get better signal strength, this better beam will be selected by UE based on the beam-RSRP and this will improve coverage as well.

answer Jan 9, 2018 by Jaganathan
All the antennas or a set of antennas (antenna array) are used to transmit to a particular UE, while at the UE side, the signal appears to be received from a single antenna. This is achieved by modifying the phase and amplitude of signal at each transmit chain so that signals from all antennas traversing different paths converge at the UE at the same time.
0 votes

Beam forming is a vast concept but i try to explain logical part of it -
Beam-forming is massive(multi)antenna technology, which dissipate the power in certain direction(& angle).
In non - technical words - lightening CFL in a room will dissipate the energy in surrounding direction but lightening beamed torch will dissipate the energy in particular direction.

Advantage in wireless system - The biggest advantage(but not only) is - improved SNR. It sense, end users distance, direction, movement speed, traffic type etc and dissipate the energy in particular direction.

answer Jun 5, 2018 by Brajesh Soni
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In LTE network, OFDMA is being used for downlink and S-FDMA is for uplink direction.
What about 5G radio access mechanism ? How radio resources would be accessed by 5G handsets ?

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There are 6 different Beam can be formed, if transmit diversity applies in Beam forming then How many Beams will be used in single transmission ?

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can we use same technology which is used in WIFI .
Switched Array Antenna
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Beamforming by Precoding

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