Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

The Optimal Power Allocation with Hybrid Relaying Based on Channel Condition

Version 1 : Received: 18 March 2018 / Approved: 19 March 2018 / Online: 19 March 2018 (10:39:11 CET)

A peer-reviewed article of this Preprint also exists.

Jeon, J.; Shim, Y.; Park, H. Optimal Power Allocation with Hybrid Relaying Based on the Channel Condition. Appl. Sci. 2018, 8, 690. Jeon, J.; Shim, Y.; Park, H. Optimal Power Allocation with Hybrid Relaying Based on the Channel Condition. Appl. Sci. 2018, 8, 690.

Abstract

This paper considers a hybrid relay network consisting of the source, the amplify-and-forward (AF) relay, the decode-and-forward (DF) relay, and the destination. We propose the optimal power allocation schemes between two different relays which maximize the achievable rate under a sum relay power constraint for given channel gains and transmit power from source. By solving the optimization problem to maximize the achievable rate for each relay network, the transmit power values in closed-form are derived. When the channel gains are the same, the optimal power allocation scheme for AF-DF relay network proves that a more power should be allocated at the first relay to maximize the achievable rate. In case of the DF-AF relay network, we derive the optimal power allocation scheme for the possible four cases. Under the same SNR condition at the first hop, we show that the achievable rate of AF-DF relay network is greater than that of DF-AF relay network when the channel gain between two relays is higher than that between the second relay and destination. Simulation results show that the proposed power allocation schemes provide a higher achievable rate than the equal power allocation schemes.

Keywords

Power allocation; hybrid relay network; amplify-and-forward (AF); decode-and-forward (DF); achievable rate

Subject

Engineering, Electrical and Electronic Engineering

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.