THE ESTIMATION OF CHANNEL STATE INFORMATION FOR MULTI-USER LTE SYSTEMS

Subhra Surochita Mishra, Jibendu Sekhar Roy

DOI Number
https://doi.org/10.2298/FUEE2501071M
First page
071
Last page
088

Abstract


The Single carrier frequency division multiple access (SC-FDMA) at the receiver side has a very low power consumption and is considered as the technique for uplink in long-term evolution (LTE). The objective of this paper is to exploit the channel state information (CSI) at the receiver end and then fed back to the transmitter end, until the channel gains in both links are highly correlated or reciprocal. In the uplink channel multiple independent receivers transmit to the eNB in same time-frequency resource. In the downlink channel the eNB transmits data packets to multiple independent user end (UE) in same time-frequency resource. A joint processing is carried out at eNB end called precoding which requires the knowledge of CSI at transmitting end. Exploiting such channel information makes it possible to increase the channel capacity, improve error performance, and at the same time reduce hardware complexity. Here the time division duplexing (TDD) systems are taken because forward and reverse channels tend to be reciprocal. The performance of TDD-based duplex model for multi-user LET-advanced (LTE-A) system is observed for vehicular, pedestrian and typical urban (TU) channel models. In uplink, the obtained bit error rate (BER) at 20 dB signal-to-noise ratio (SNR) for extended pedestrian A (EPA) model is 0.0503 at 5 Hz which is better compared to 0.0664 for extended typical urban (ETU) model at 70 Hz and 0.0625 for extended vehicular A (EVA) model at 70 Hz. But in downlink, the ETU model achieved a BER of 0.0391 at 70 Hz compared to 0.0465 for EVA model at 70 Hz and 0.0451 for EPA model at 5 Hz. The system model performs better for MSE obtained is -19.5640 dB for EPA at 5 Hz in both uplink and downlink.

Keywords

Channel estimation, LTE, Precoding, channel state information, TDD

Full Text:

PDF

References


S. Sesia, I. Toufik and M. Baker (Edited), LTE - The UMTS Long Term Evolution, from Theory to Practice, 2nd Ed., Wiley Publishers, 2011.

P. Humblet and A. Richardson, "Femtocell Radio Technology", Airvana Corporation Whitepaper, May 2010.

UTRA-UTRAN Long Term Evolution (LTE) and 3GPP System Architecture Evolution (SAE) Long Term Evolution of the 3GPP Radio Technology, Technical Papers, 2008.

Y. S. Cho, J. Kim, W.Y. Yang and C.G. Kang, MIMO-OFDM Wireless Communications with MATLAB, John Wiley & Sons (Asia) Pte Ltd, 2010.

A. Petroni, G. Scarano, R. Cusani and M. Biagi, "On the Impact of Channel State Information Quantization and Feedback in Practical OFDM Implementation", IEEE Commun. Lett., vol. 28, no. 2, pp. 278-282, Feb. 2024.

K. H. Chung, "On Negative Correlation Bit-to-symbol(B2S) Mapping for NOMA with Correlated Information Sources in 5G Systems", J. KIECS, vol. 15, no. 5, pp. 881-888, 2020.

J. S. Roy and S. S. Mishra, "Performance of SC-FDMA for LTE Uplink Under Different Modulation Schemes", In Proceedings of the IEEE International Conference on Mechatronics, Robotics and Systems Engineering (MoRSE), Bali, Indonesia, 2019, pp. 202-206.

M. Vaezi, R. Schober, Z. Ding and H. V. Poor, "Non-orthogonal Multiple Access: Common Myths and Critical Questions", IEEE Wireless Commun., vol. 26, no. 5, pp. 174-180, Oct. 2019.

Y. Cai, Z. Qin, F. Cui, G. Y. Li and J. A. McCann, "Modulation and Multiple Access for 5G Networks", IEEE Commun. Surveys Tuts., vol. 20, no. 1, pp. 629-646, 2018.

S. S. Mishra and J. S. Roy, "Comparison of Performances Between SC-FDMA and OFDMA Systems Under Different Sub-carrier Mapping Schemes",” ASEAN Eng. J., vol. 13, no. 2, pp. 19-23, May, 2023.

C. Pan, H. Ren, K. Wang, J. F. Kolb, M. Elkashlan, M. Chen, M. Di Renzo, Y. Hao, J. Wang, A. L. Swindlehurst, X. You and L. Hanzo, "Reconfigurable Intelligent Surfaces for 6G Systems: Principles, Applications, and Research Directions", IEEE Comm. Mag., vol. 59, no. 6, pp. 14-20, Jun. 2021.

I. Batalha, A. Lopes, W. Lima, Y. Barbosa, M. Neto, F. Barros and G. Cavalcante, "Large-scale Modeling and Analysis of Uplink and Downlink Channels for LORA Technology in Suburban Environments", IEEE Internet Things J., vol. 9, no. 23, pp. 24477-24491, Dec. 2022.

S. S. Mishra and J. S. Roy, "SC-FDMA Uplink System in Heavily Faded Areas with Low Signal-to-Noise Ratio", Adv. Electr. Electron. Eng., vol. 21, no. 3, pp. 206-215, June 2023.

H. Xu, J. Zhang, P. Tang, L. Tian, Q. Wang and G. Liu, "An Empirical Study on Channel Reciprocity in TDD and FDD Systems", IEEE Open J. Veh. Technol., vol. 5, pp. 108-124, 2024.

W. Tang, J. Wang, J. Y. Dai, M. Di Renzo, S. Jin, Q. Cheng and T. J. Cui, "On Path Loss and Channel Reciprocity of RIS‐assisted Wireless Communications", in Intelligent Surfaces Empowered 6G Wireless Network, Wiley, pp.37-58, 2024.

A. Gupta and R. K. Jha, "A Survey of 5G Network: Architecture and Emerging Technologies", IEEE Access, vol. 3, pp. 1206-1232, 2014.

H. Zhang et al. "Frequency-domain Channel Estimation for Multi-user MIMO Systems," IEEE Trans. Wirel. Commun., vol. 15, no. 10, pp. 7023-7034, 2016.

Y. Yu and W. Wu, "Channel Estimation for MIMO-OFDM Systems in Time Domain", IEEE Trans. Wirel. Commun., vol. 3, no. 3, pp. 809-818, 2004.

D. Gesbert, M. Kountouris, R. W. Heath, C. -B. Chae and T. Salzer, "From Single-user to Multi-user Communications: Shifting the Paradigm", IEEE Trans. Wirel. Commun., vol. 7, no. 6, pp. 2093-2103, 2007.

J. Hoydis, S. ten Brink and M. Debbah, "Massive MIMO: How Many Antennas do We Need?", In Proceedings of the 49th Annual Allerton Conference on Communication, Control, and Computing (Allerton), Monticello, IL, USA, 2011, pp. 545-550.

H. Li and J. Liu, "Nonlinear Precoding for Multi-user MIMO Systems," IEEE Trans. Signal Process., vol. 60, no. 6, pp. 2992-3002, 2012.

J. Kim et al., "Hybrid Channel Estimation and Precoding for Multi-user Massive MIMO Systems", IEEE Trans. Wirel. Commun., vol. 15, no. 4, pp. 2672-2684, 2016.

D. Lee et al., "Hybrid Precoding for 5G: A survey", IEEE Access, vol. 8, pp. 88712-88729, 2020.

M. Deepender, U. Shrivastava and J. K. Verma, "A Study on 5G Technology and Its Applications in Telecommunications", In Proceedings of the International Conference on Computational Performance Evaluation (ComPE), Shillong, India, 2021, pp. 365-371.

R. Kumar, I. Singh, A. Alkhayyat, A. Joshi, A. Badhoutiya and S. Singh, "5G: Radio Technology Crafted for Wireless Cellular Connectivity", In Proceedings of the 11th International Conference on Computing for Sustainable Global Development (INDIACom), 2024, pp.721-726.

Lovekesh, M. Yadav and D. Nandal, "Exploring 5G Architecture, Technologies, and Mobility Challenges: A Path to SDN-Based Future", In Proceedings of the International Conference on Advanced Computing & Communication Technologies (ICACCTech), 2023, pp. 551-558.

Z. Zhang, Y. Zhang, J. Zhang and F. Gao, "Adversarial Training-aided Time-varying Channel Prediction for TDD/FDD Systems", China Commun., vol. 20, no. 6, pp. 100-115, June 2023.

H. Xu, G. Zhou, K. -K. Wong, W. K. New, C. Wang, C. -B. Chae, R. Murch, S. Jin and Y. Zhang, "Channel Estimation for FAS-assisted Multiuser mmwave Systems", IEEE Commun. Lett., vol. 28, no. 3, pp. 632-636, March 2024.

F. Zhao, W. Chen, Z. Liu, J. Li and Q. Wu, "Deep Reinforcement Learning-based Intelligent Reflecting Surface Optimization for TDD Multi-user MIMO Systems", IEEE Wirel. Commun. Lett., vol. 12, no. 11, pp. 1951-1955, Nov. 2023.

D. Morejón, J. Montalbán, E. Iradier, M. Kashef Hany, R. Candell and P. Angueira, "Empirical Characterization of Doppler in Industrial Cireless channels", In Proceedings of the 18th European Conference on Antennas and Propagation (EuCAP), Glasgow, UK, 2024, pp. 1-5.

L. Yao, L. Peng, G. Li, H. Fu and A. Hu, "A Simulation and Experimental Study of Channel Reciprocity in TDD and FDD Wiretap Channels", In Proceedings of the IEEE 19th International Conference on Communication Technology (ICCT), Xi'an, China, 2019, pp. 113-117.

N. A. Moghaddam, A. Maleki and A. R. Sharafat, "Peak-to-average Power Ratio Reduction in LTE-advanced Systems Using Low Complexity and Low Delay PTS", IET Commun., vol. 14, no. 11, pp. 1768-1772, 2020.

G. Azarnia, A. A. Sharifi and H. Emami,"Compressive Sensing Based PAPR Reduction in OFDM Systems: Modified Orthogonal Matching Pursuit Approach", ICT Express, vol. 6, no. 4, pp. 368-371, 2020.

S. Ramtej and S. Anuradha, "On Companding Techniques to Mitigate PAPR in SC-FDMA Systems", Int. J. Wirel. Mob. Comput., vol. 18, no. 3, pp. 295-302, 2020.

C. Xing, M. Xia, F. Gao and Y. -C. Wu, "Robust Transceiver with Tomlinson-Harashima Precoding for Amplify-and-Forward MIMO Relaying Systems", IEEE J. Sel. Areas Commun., vol. 30, no. 8, pp. 1370-1382, Sept. 2012.

Y. Li, M. Xia, and Y. -C. Wu, "Energy-Efficient Precoding for Non-Orthogonal Multicast and Unicast Transmission via First-Order Algorithm", IEEE Trans. Wirel. Commun., vol. 18, no. 9, pp. 4590-4604, Sept. 2019.

Y. A. Jawhar, K. Ramli, M. A. Taher, N. S. Shah, S. Mostafa and B. A. Khalaf, "Improving PAPR Performance of Filtered OFDM for 5G Communications Using PTS", ETRI Journal Wiley, vol. 43, no. 2, pp. 209-220, 2021.

K. Zhong, Y. -C. Wu and S. Li, "Signal Detection for OFDM-Based Virtual MIMO Systems under Unknown Doubly Selective Channels, Multiple Interferences and Phase Noises", IEEE Trans. Wirel. Commun., vol. 12, no. 10, pp. 5309-5321, Oct. 2013.

A. M. Musa, R. Mokhtar, R. Saeed, H. Alhumyani, S. A. Khalek and A. Y. Mohamed, "Distributed SC-FDMA Sub-carrier Assignment for Digital Mobile Satellite", Alexandria Eng. J. vol. 60, no. 6, pp. 4973-4980, 2021.

J. Chen, Y. -C. Wu, S. Ma and T. -S. Ng, "Joint CFO and Channel Estimation for Multiuser MIMO-OFDM Systems with Optimal Training Sequences", IEEE Trans. Signal Process., vol. 56, no. 8, pp. 4008-4019, Aug. 2008.

T. Li, Z. Tong, W. Zhang, Y. Liu and M. Wang, "Low-complexity PAPR Reduction Scheme Selective Mapping Cascading Improved μ Law Companding in CO-OFDM System", Wirel. Pers. Commun., vol. 122, no. 1, pp. 861-876, 2022.

H. Li, C. Huang, C. X. Wang and J. Li, "Scenario Classification and Channel Modeling for MIMO Communications in Dense Urban Street Scenarios", In Proceedings of the 18th European Conference on Antennas and Propagation (EuCAP), Glasgow, UK, 2024, pp. 1-5.

J. Bao, Z. Cui, Y. Miao, Q. Zhu, B. Hua, K. Mao and H. Ni, "Impact of 6G Mobility on Doppler Characteristics of UAV-to-Vehicle Channels", In Proceedings of the 18th European Conference on Antennas and Propagation (EuCAP), Glasgow, UK, 2024, pp. 1-5, 2024.


Refbacks

  • There are currently no refbacks.


ISSN: 0353-3670 (Print)

ISSN: 2217-5997 (Online)

COBISS.SR-ID 12826626