Research ArticleOpen AccessGoogle Scholar indexed
On the Performance Analysis of One Tap Equalizers in Oversampled OFDM Systems
School of Electrical Engineering and Computing, The University of Newcastle, Callaghan, Australia
Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
- 1 School of Electrical Engineering and Computing, The University of Newcastle, Callaghan, Australia
- 2 Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
International Journal of Communications, Network and System Sciences·Volume 11 (2018)·Pages 187–198·Published 28 September 2018·DOI10.4236/ijcns.2018.119011
Copy link · social · email
Abstract
Oversampling is commonly encountered in orthogonal frequency division multiplexing (OFDM) systems to ease various performance characteristics. In this paper, we investigate the performance and complexity of one tap zero-forcing (ZF) and minimum mean-square error (MMSE) equalizers in oversampled OFDM systems. Theoretical analysis and simulation results show that oversampling not only reduces the noise at equalizer output but also helps mitigate ill effects of spectral nulls. One tap equalizers therefore yield improved symbol-error-rate (SER) performance with the increase in oversampling rate, but at the expense of increased system bandwidth and modest complexity requirements.
KeywordsOne Tap EqualizationOversamplingOrthogonal Frequency Division MultiplexingInverse Fast Fourier Transform
- van Nee, R. and Prasad, R. (2000) OFDM for Wireless Multimedia Communications. Artech House.
- Rohling, H., Ed. (2011) OFDM: Concepts for Future Communication Systems. 1st Edition, Springer-Verlag Berlin Heidelberg. https://doi.org/10.1007/978-3-642-17496-4
- (2000) Digital Video Broadcasting (DVB): Framing Structure, Channel Coding and Modulation for Digital Terrestrial Television. 1st Edition, ETSI, EN 300 744.
- (2000) Radio Broadcasting Systems: Digital Audio Broadcasting (DAB) to Mobile, Portable and Fixed Receivers. 1st Edition, ETSI, EN 300 401.
- (1997) Asymmetric Digital Subscriber Line (ADSL) Metallic Interface. ANSI, ANSI/TEI/9J-007.
- Lin, H. (2015) Flexible Configured OFDM for 5G Air Interface. IEEE Access, 3, 1861-1870. https://doi.org/10.1109/ACCESS.2015.2480749
- (2012) 950 MHz-Band Telemeter, Tele Control and Data Transmission Radio Equipment for Specified Low Power Radio Station, ARIB std-t108 ver. 1.0 ed. Association of Radio Industries and Business.
- Park, M. (2013) IEEE 802.11ah Specification Framework Document, Version 14, DCN IEEE 802.11-13/0014r0.
- Yang, L. and Armstrong, J. (2010) Oversampling to Reduce the Effect of Timing Jitter on High Speed OFDM Systems. IEEE Communications Letters, 14, 196-198. https://doi.org/10.1109/LCOMM.2010.03.091963
- Umar, S., Priya, N., Gayathri, P, Subba Reddy, T. and Abdul, A.M. (2018) Design of Jitter Spectral Shaping as Robust with Various Oversampling Techniques in OFDM. In: Satapathy, S., Bhateja, V. and Das, S. Eds., Smart Computing and Informatics, Smart Innovation, Systems and Technologies, Springer, Singapore, 77.
- van Nee, R., and de Wild, A. (1998) Reducing the Peak-to-Average Power Ratio of OFDM. Proc. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151), Ottawa, Ont., 2072-2076.
- Dinis, R. and Gusmao, A. (1999) On the Performance Evaluation of OFDM Transmission Using Clipping Techniques. Proceedings of IEEE VTS 50th Vehicular Technology Conference (VTC), 2923-2928.
- Jayalath, A.D.S. and Athaudage, C.R.N. (2004) On the PAR Reduction of OFDM Signals Using Multiple Signal Representation. IEEE Communications Letters, 8, 425-427. https://doi.org/10.1109/LCOMM.2004.832767
- Ochiai, H. and Imai, H. (2001) On the Distribution of the Peak-to-Average Power Ratio in OFDM Signals. IEEE Transactions on Communications, 49, 282-289. https://doi.org/10.1109/26.905885