no code implementations • 18 Mar 2025 • Nipuni Ginige, Nandana Rajatheva, Matti Latva-aho
Numerically we have shown that the bit error rate (BER) performance of the CNN-based autoencoder system is better than the theoretical BER performance of the RIS-assisted communication systems.
no code implementations • 9 Feb 2025 • Sukanya Deka, Kuntal Deka, Nhan Thanh Nguyen, Sanjeev Sharma, Vimal Bhatia, Nandana Rajatheva
The application of machine learning in wireless communications has been extensively explored, with deep unfolding emerging as a powerful model-based technique.
no code implementations • 21 Nov 2024 • Nipuni Ginige, Arthur Sousa de Sena, Nurul Huda Mahmood, Nandana Rajatheva, Matti Latva-aho
Moreover, our scheme can deliver a high average downlink sum rate, outperforming other state-of-the-art channel estimation methods.
no code implementations • 5 Jun 2024 • Dileepa Marasinghe, Le Hang Nguyen, Jafar Mohammadi, Yejian Chen, Thorsten Wild, Nandana Rajatheva
The large untapped spectrum in sub-THz allows for ultra-high throughput communication to realize many seemingly impossible applications in 6G.
no code implementations • 9 May 2024 • Nipuni Ginige, Arthur Sousa de Sena, Nurul Huda Mahmood, Nandana Rajatheva, Matti Latva-aho
Reconfigurable intelligent surfaces (RISs) have emerged as a promising technology to enhance the performance of sixth-generation (6G) and beyond communication systems.
no code implementations • 6 Apr 2024 • Nalin Jayaweera, Andrea Bonfante, Mark Schamberger, Amir Mehdi Ahmadian Tehrani, Tachporn Sanguanpuak, Preetish Tilak, Keeth Jayasinghe, Frederick W. Vook, Nandana Rajatheva
In this study, we discuss different sub-use cases of SBP and TBP and evaluate the beam prediction accuracy of AI/ML models designed for each sub-use case along with AI/ML model generalization aspects.
no code implementations • 23 Oct 2023 • A. Indika Perera, K. B. Shashika Manosha, Nandana Rajatheva, Matti Latva-aho
We propose a BS selection algorithm for UE positioning based on the GDOP of the BSs participating in the positioning process.
no code implementations • 9 Oct 2023 • Samitha Gunarathne, Thushan Sivalingam, Nurul Huda Mahmood, Nandana Rajatheva, Matti Latva-aho
Managing inter-cell interference is among the major challenges in a wireless network, more so when strict quality of service needs to be guaranteed such as in ultra-reliable low latency communications (URLLC) applications.
no code implementations • 8 Jun 2023 • Nuwanthika Rajapaksha, Jafar Mohammadi, Stefan Wesemann, Thorsten Wild, Nandana Rajatheva
In this paper, we consider the downlink transmission of an MU-MIMO network where TAM is formulated to minimize the number of active antennas in the BS while guaranteeing the per-user throughput requirements.
no code implementations • 4 Apr 2023 • Chandu Jayawardhana, Thushan Sivalingam, Nurul Huda Mahmood, Nandana Rajatheva, Matti Latva-aho
It is found that such a decomposition-based prediction method reduces the root mean squared error of the prediction by $20 - 25\%$.
no code implementations • 27 Feb 2023 • Maheshi Lokumarambage, Vishnu Gowrisetty, Hossein Rezaei, Thushan Sivalingam, Nandana Rajatheva, Anil Fernando
Semantic communication is considered the future of mobile communication, which aims to transmit data beyond Shannon's theorem of communications by transmitting the semantic meaning of the data rather than the bit-by-bit reconstruction of the data at the receiver's end.
no code implementations • 24 Feb 2022 • Dilin Dampahalage, K. B. Shashika Manosha, Nandana Rajatheva, Matti Latva-aho
In the on-grid case, we propose an algorithm to estimate the direct and RIS channels.
no code implementations • 1 Oct 2021 • Dileepa Marasinghe, Nandana Rajatheva, Matti Latva-aho
Leveraging higher frequencies up to THz band paves the way towards a faster network in the next generation of wireless communications.
no code implementations • 14 Jul 2021 • Kai Mei, Jun Liu, Xiaoying Zhang, Kuo Cao, Nandana Rajatheva, Jibo Wei
Besides, a training data construction approach utilizing least square (LS) estimation results is proposed so that the training data can be collected during the data transmission.
no code implementations • 13 Jul 2021 • Nipuni Ginige, K. B. Shashika Manosha, Nandana Rajatheva, Matti Latva-aho
Further, we have shown that the proposed estimator is robust to interference caused by the hardware impairments at the transceiver and RIS.
no code implementations • 21 Jun 2021 • Thushan Sivalingam, Samad Ali, Nurul Huda Mahmood, Nandana Rajatheva, Matti Latva-aho
Grant-free random access and uplink non-orthogonal multiple access (NOMA) have been introduced to reduce transmission latency and signaling overhead in massive machine-type communication (mMTC).
no code implementations • 17 Mar 2021 • Insaf Ismath, Samad Ali, Nandana Rajatheva, Matti Latva-aho
Access points (APs) in millimeter-wave (mmWave) and sub-THz-based user-centric (UC) networks will have sleep mode functionality.
no code implementations • 22 Feb 2021 • Madhushanka Padmal, Dileepa Marasinghe, Vijitha Isuru, Nalin Jayaweera, Samad Ali, Nandana Rajatheva
However, LiDARs are power hungry devices that generate a lot of data, and these characteristics limit their use as on-board sensors in robots.
no code implementations • 20 Feb 2021 • Nuwanthika Rajapaksha, K. B. Shashika Manosha, Nandana Rajatheva, Matti Latva-aho
Specifically, we model a deep neural network (DNN) and train it in an unsupervised manner to learn the optimum user power allocations which maximize the minimum user rate.
no code implementations • 12 Jan 2021 • Thulitha Senevirathna, Bathiya Thennakoon, Tharindu Sankalpa, Chatura Seneviratne, Samad Ali, Nandana Rajatheva
This is done by restructuring the transmission data in a way that the LSTM network can identify the causal relationship between the devices.
no code implementations • 5 Nov 2020 • Dilin Dampahalage, K. B. Shashika Manosha, Nandana Rajatheva, MattiLatva-aho
An intelligent reflecting surface consists of passive elements, which can reflect the incoming signals with adjustable phase shifts.
no code implementations • 15 Sep 2020 • Insaf Ismath, K. B. Shashika Manosha, Samad Ali, Nandana Rajatheva, Matti Latva-aho
In this paper, we propose a novel deep contextual bandit (DCB) based approach to perform fast and efficient IA in mmWave based UC UD networks.
no code implementations • 17 Aug 2020 • Nandana Rajatheva, Italo Atzeni, Simon Bicais, Emil Bjornson, Andre Bourdoux, Stefano Buzzi, Carmen D'Andrea, Jean-Baptiste Dore, Serhat Erkucuk, Manuel Fuentes, Ke Guan, Yuzhou Hu, Xiaojing Huang, Jari Hulkkonen, Josep Miquel Jornet, Marcos Katz, Behrooz Makki, Rickard Nilsson, Erdal Panayirci, Khaled Rabie, Nuwanthika Rajapaksha, MohammadJavad Salehi, Hadi Sarieddeen, Shahriar Shahabuddin, Tommy Svensson, Oskari Tervo, Antti Tolli, Qingqing Wu, Wen Xu
Several categories of enablers at the infrastructure, spectrum, and protocol/algorithmic levels are required to realize the intended broadband connectivity goals in 6G.
no code implementations • 19 Nov 2019 • Nuwanthika Rajapaksha, Nandana Rajatheva, Matti Latva-aho
The newly proposed low complexity autoencoder was capable of achieving a better BER performance than half-rate 16-QAM with hard decision decoding over the full 0-10 dB $E_{b}/N_{0}$ range and a better BER performance than the soft decision decoding in 0-4 dB $E_{b}/N_{0}$ range.
no code implementations • 10 Nov 2019 • Kai Mei, Jun Liu, Xiaochen Zhang, Nandana Rajatheva, Jibo Wei
In this situation, our analysis results can be applied to assess the performance and support the design of machine learning-based channel estimation.
no code implementations • 26 Aug 2018 • Nalin Jayaweera, Nandana Rajatheva, Matti Latva-aho
If we are to reduce the effort for the processing units inside the car, we need to uplink the data to edge or an appropriately placed cloud.