K.H. Ancy, Rahul M Nair, Nehru College of Engineering and Research Centre, Pampady, Thrissur, India.
DOI : 01.0401/ijaict.2014.01.22
International Journal of Advanced Information and Communication Technology
Received On : July 10, 2014
Revised On : August 20, 2014
Accepted On : Septemper 10, 2014
Published On : October 05, 2014
Volume 01, Issue 06
Pages : 113-119
Abstract
This paper presents a cyclic prefixed conjugate transmission technique with adaptive receiver to cancel out the ICI in OFDM systems using MMSE equalizer. The receiver design is based on the phase rotated conjugate cancellation (PRCC) concept , where two individual phase rotations are employed on the two receive paths, rather than only one phase rotation is adopted for the two transmit paths in the PRCC scheme. Cyclic prefix increases signal spacing and makes the signal more robust to ISI. The two phase rotations are chosen properly using the criterion of maximizing the carrier-to -interference ratio such that an additionalphase distortion on the detected symbol could be completely removed. Block least mean-squared algorithm is applied to adaptively update the two phase rotations with the frequency offset variation. BER performance of the proposed method with MMSEand Zero Forcing Equalizer is compared. Simulation results shows that MMSE equalizer based approach can further improve the performance of proposed scheme at low to medium SNRs.
Keywords
Inter Carrier Interference (ICI), Adaptive Receiver, Frequency Offset, OFDM, MMSE, Block Least Mean Square Algorithm.
Cite this article
K.H. Ancy, Rahul M Nair, “An Efficient Receiver for ICI Cancellation in OFDM Systems Based On PRCC Scheme Using MMSE Equalizer” INTERNATIONAL JOURNAL OF ADVANCED INFORMATION AND COMMUNICATION TECHNOLOGY, pp.113-119, October 05, 2014.
Copyright
© 2014 K.H. Ancy, Rahul M Nair. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.