Hybrid NOMA-TDMA for Multiple Access Channels with Non-Ideal Batteries and Circuit Cost

01/11/2018
by   Rajshekhar Vishweshwar Bhat, et al.
0

We consider a multiple-access channel where the users are powered from batteries having non-negligible internal resistance. When power is drawn from the battery, a variable fraction of the power, which is a function of the power drawn from the battery, is lost across the internal resistance. Hence, the power delivered to the load is less than the power drawn from the battery. The users consume a constant power for the circuit operation during transmission but do not consume any power when not transmitting. In this setting, we obtain the maximum sum-rates and achievable rate regions under various cases. We show that, unlike in the ideal battery case, the TDMA (time-division multiple access) strategy, wherein the users transmit orthogonally in time, may not always achieve the maximum sum-rate when the internal resistance is non-zero. The users may need to adopt a hybrid NOMA-TDMA strategy which combines the features of NOMA (non-orthogonal multiple access) and TDMA, wherein a set of users are allocated fixed time windows for orthogonal single-user and non-orthogonal joint transmissions, respectively. We also numerically show that the maximum achievable rate regions in NOMA and TDMA strategies are contained within the maximum achievable rate region of the hybrid NOMA-TDMA strategy.

READ FULL TEXT
POST COMMENT

Comments

There are no comments yet.

Authors

page 1

page 2

page 3

page 4

01/11/2018

A Hybrid NOMA-TDMA for Multiple Access Channels with Non-Ideal Batteries and Circuit Cost

We consider a multiple-access channel where the users are powered from b...
04/06/2020

Performance Analysis of Uplink Adaptive NOMA Depending on Channel Knowledge

Non Orthogonal Multiple Access (NOMA) is a key technique to satisfy larg...
02/14/2020

Optimizing Non-Orthogonal Multiple Access in Random Access Networks

Non-orthogonal multiple access (NOMA) has been considered as a promising...
12/17/2019

NOMA versus OMA in Finite Blocklength Regime: Link-Layer Rate Performance

In this paper, we investigate the latency performance comparison of non-...
07/27/2021

Next-Generation Multiple Access Based on NOMA with Power Level Modulation

To cope with the explosive traffic growth of next-generation wireless co...
03/04/2020

Resource Allocation Technique for Hybrid TDMA-NOMA System with Opportunistic Time Assignment

In this paper, we develop a resource allocation technique for a hybrid t...
06/01/2019

On the Fairness Performance of NOMA-based Wireless Powered Communication Networks

The near-far problem causes severe throughput unfairness in wireless pow...
This week in AI

Get the week's most popular data science and artificial intelligence research sent straight to your inbox every Saturday.