View source for 18266580. PRECODING AND POWER ALLOCATION FOR ACCESS POINTS IN A CELL-FREE COMMUNICATION SYSTEM simplified abstract (Telefonaktiebolaget LM Ericsson (publ))

=PRECODING AND POWER ALLOCATION FOR ACCESS POINTS IN A CELL-FREE COMMUNICATION SYSTEM=


==Organization Name==

[[:Category:Telefonaktiebolaget LM Ericsson  (publ)|Telefonaktiebolaget LM Ericsson  (publ)]]


[[Category:Telefonaktiebolaget LM Ericsson  (publ)]]

==Inventor(s)==

[[:Category:Igor Almeida of INDAIATUBA-SP (BR)|Igor Almeida of INDAIATUBA-SP (BR)]][[Category:Igor Almeida of INDAIATUBA-SP (BR)]]

[[:Category:Eduardo Medeiros of SUNDBYBERG (BR)|Eduardo Medeiros of SUNDBYBERG (BR)]][[Category:Eduardo Medeiros of SUNDBYBERG (BR)]]

[[:Category:Aldebaro Klautau of Marco-Belem-Para (BR)|Aldebaro Klautau of Marco-Belem-Para (BR)]][[Category:Aldebaro Klautau of Marco-Belem-Para (BR)]]

[[:Category:Leonardo Ramalho of Belem-Para (BR)|Leonardo Ramalho of Belem-Para (BR)]][[Category:Leonardo Ramalho of Belem-Para (BR)]]

[[:Category:Andrey Nakamura of Belem-Para (BR)|Andrey Nakamura of Belem-Para (BR)]][[Category:Andrey Nakamura of Belem-Para (BR)]]

==PRECODING AND POWER ALLOCATION FOR ACCESS POINTS IN A CELL-FREE COMMUNICATION SYSTEM - A simplified explanation of the abstract==


This abstract first appeared for US patent application 18266580 titled 'PRECODING AND POWER ALLOCATION FOR ACCESS POINTS IN A CELL-FREE COMMUNICATION SYSTEM

==Simplified Explanation==

The abstract describes mechanisms for determining a precoder for Access Points (APs) in a cell-free communication system. The method involves obtaining channel estimates of the radio propagation channel between the APs and user equipment, determining a precoder for the APs with a Zero Forcing (ZF) precoding factor and power allocation factor, and initiating transmission of precoded user symbols from the APs towards the user equipment.

* Channel estimates of the radio propagation channel between APs and user equipment are obtained.
* A precoder for the APs is determined, with a ZF precoding factor and power allocation factor.
* The ZF precoding factor is determined from the channel estimates.
* The power allocation factor is determined by maximizing total transmission power for all user symbols to be transmitted, with power constraints for APs and lower bounds for user equipment.
* Precoded user symbols are transmitted from the APs to the user equipment.

### Potential Applications
* Cell-free communication systems
* Wireless communication networks
* 5G and beyond technologies

### Problems Solved
* Efficient precoding for APs in cell-free communication systems
* Maximizing transmission power while meeting power constraints
* Providing reliable communication for user equipment

### Benefits
* Improved signal quality and coverage
* Enhanced spectral efficiency
* Optimal power allocation for transmission
* Better overall performance in wireless networks


==Original Abstract Submitted==

There is provided mechanisms for determining a precoder for APs in a cell-free communication system. A method is performed by a controller of the APs. The method comprises obtaining channel estimates of a radio propagation channel between the APs and user equipment served in the cell-free communication system. The method comprises determining a precoder for the APs. The precoder has a ZF precoding factor and a power allocation factor. The ZF precoding factor is determined from the channel estimates. The power allocation factor is determined by maximizing total transmission power for all user symbols to be transmitted to the user equipment, one user symbol per each user equipment. Transmission power of each of the APs is not larger than a power constraint. Transmission power for each of the user equipment is lower bounded by a scaled heuristic value. The method comprises initiating transmission of precoded user symbols from the APs towards the user equipment. The user symbols are precoded according to the determined precoder.



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