Open AccessEffective Power Allocation Using for Transmit Source In MIMO Relay Communication
Author(s) -
Hoai Trung Tran
Publication year - 2021
Publication title -
european journal of electrical engineering and computer science
Language(s) - English
Resource type - Journals
ISSN - 2736-5751
DOI - 10.24018/ejece.2021.5.3.335
Subject(s) - relay , relay channel , lagrange multiplier , mimo , channel (broadcasting) , computer science , channel capacity , precoding , transmitter power output , communications system , power (physics) , electronic engineering , algorithm , mathematics , mathematical optimization , telecommunications , engineering , transmitter , physics , quantum mechanics
The Multiple Input Multiple Output (MIMO) systems using relays are of interest for high-speed radio communication systems. Currently, most of the articles are interested in the model of three nodes with purposes such as increasing the channel capacities (mutual information) or reducing the minimum mean square of error. This paper extends to more than one relay and is concerned with the maximum channel capacity. It is assumed that the channel matrices between source and relay as well as relay and receiver are random matrices; the relay precoders are also assumed to be random and known at the receiver. The article proposes that the Lagrange multiplier finding algorithm using the Newton – Raphson optimization method is more straightforward than the traditional finding algorithm using the first and second derivatives but still gives a higher channel capacity.