A Low-complexity Time-domain SNR Estimation Algorithm for OFDM Communication Systems (OFDM 통신 시스템을 위한 경량 SNR 추정 알고리즘)

Jihun Koo (구지훈); YOONHAYOUNG (윤하영)

doi:10.34163/jkits.2019.14.5.009

A Low-complexity Time-domain SNR Estimation Algorithm for OFDM Communication Systems

Journal of Knowledge Information Technology and Systems
Abbr : JKITS
2019, 14(5), pp.527-534
DOI : 10.34163/jkits.2019.14.5.009
Publisher : Korea Knowledge Information Technology Society
Research Area : Interdisciplinary Studies > Interdisciplinary Research
Received : September 11, 2019
Accepted : October 11, 2019
Published : October 31, 2019

Jihun Koo ¹, YOONHAYOUNG ¹

¹오산대학교

Accredited

ABSTRACT

Orthogonal Frequency Division Multiplexing technology is a multi-carrier modulation technique that uses multiple narrowband subcarriers for high speed data transmission, wherein each subcarrier carrying corresponding data bit, among which are orthogonal to each other. Because of its strong resistance to frequency selective fading, it is indispensable for broadband digital communication systems such as 4G and 5G, and wireless local area networks. However, since the unified symbol detector and channel estimation suitable for all channel environments are difficult in practical cases, algorithms using estimated SNR are used in each block of the communication system. Therefore, SNR estimation accuracy has become a major performance factor in an important OFDM wireless communication system. In this paper, we propose a simplified method of time-domain based SNR estimation based on the representative IEEE802.11 standard among OFDM communication systems. The proposed method is approximated based on time-domain SNR estimation, presented as a simple implementation without square or division, and its performance is shown by simulation. Compared with the time-domain SNR estimation without approximation, it shows low and constant errors of about 0.5 dB and 0.2 dB in the frequency fading channel environment of AWGN and channel model D, respectively. And, it is shown that the proposed method can be effectively used compared to the existing approximation method in the low SNR region that influences the performance of the communication system.

KEYWORDS

OFDM Systems, SNR estimation, Preamble, Signal to noise ratio, IEEE802.11

Citation status

* References for papers published after 2023 are currently being built.

[journal] I. F. Akyildiz / 2016 / 5G roadmap: 10 key enabling technologies / Computer Networks 106 : 17~48

[journal] P. Banelli / 2014 / Modulation formats and waveforms for 5G networks: Who Will Be the Heir of OFDM?:An overview of alternative modulation schemes for improved spectral efficiency / IEEE Signal Processing Magazine 31(6) : 80~93

[other] IEEE Computer Society / 2018 / Wireless LAN medium access control (MAC) and physical layer (PHY) specifications: Enhancements for very high throughput for operation in bands below 6 GHz / IEEE

[journal] L. Rugini / 2005 / Simple equalization of time-varying channels for OFDM / IEEE Communications Letters 9(7) : 619~621

[journal] 구지훈 / 2018 / Analysis of Inter-carrier Interference by Phase Noise on OFDM Systems / 전자공학회논문지 / 대한전자공학회 55(2) : 3~8

[confproc] P. He / 2014 / A low-complexity SNR estimation algorithm and channel estimation method for OFDM systems / 2014 4th IEEE International Conference on Information Science and Technology : 698~701

[journal] 구지훈 / 2014 / A Parallel Collaborative Sphere Decoder for a MIMO Communication System / Journal of Communications and Networks / 한국통신학회 16(6) : 620~626

[journal] D. R. Pauluzzi / 2000 / A comparison of the SNR estimation techniques for the AWGN channel / IEEE Trans. Commun 48(10) : 1681~1691

[journal] G. Ren / 2008 / SNR estimation algorithm based on the preamble for wireless OFDM systems / Science in China Series F: Information Sciences 51(7) : 965~974

[confproc] M. Zivkovic / 2009 / Preamble-based SNR estimation in frequency selective channels for wireless OFDM systems / Proc. IEEE 69th Vehicular Technology Conf

[journal] X. J. Mao / 2015 / Robust adaptive beamforming against signal steering vector mismatch and jammer motion / International Journal of Antennas and Propagation 2015 : 1~12

[journal] J-C. Guey / 1999 / Signal design for transmitter diversity wireless communication systems over Rayleigh fading channels / IEEE Trans. Commun COM-47 : 527~537

[journal] J. K. Cavers / 1991 / An analysis of pilot symbol assisted modulation for Rayleigh faded channels / IEEE Trans. Veh. Tech VT-40 : 686~693

[journal] J-C. Guey / 1999 / Signal design for transmitter diversity wireless communication systems over Rayleigh fading channels / IEEE Trans. Commun COM-47 : 527~537

[journal] V. Tarokh / 1999 / Space-time codes for high data rate wireless communication: Performance criteria in the presence of channel estimation errors, mobility, and multiple paths / IEEE Trans. Commun 47(2) : 199~207

KJCKorea
Journal Central

Journal of Knowledge Information Technology and Systems 2023 KCI Impact Factor : 0.89

A Low-complexity Time-domain SNR Estimation Algorithm for OFDM Communication Systems

ABSTRACT

KEYWORDS

Citation status

* References for papers published after 2023 are currently being built.

Journal of Knowledge Information Technology and Systems 2023 KCI Impact Factor : 0.89

A Low-complexity Time-domain SNR Estimation Algorithm for OFDM Communication Systems

ABSTRACT

KEYWORDS

Statistics

Tools

Issue List

Citation status

KCI Citation Counts (2)

REFERENCES (15) * References for papers published after 2023 are currently being built.

Search PDF

Citation

* References for papers published after 2023 are currently being built.