EVALUATING A NEW SUBCARRIER MAPPING ICI-SC SCHEME USING LINEAR MAXIMUM LIKELIHOOD ALAMOUTI COMBINER (LMLAC) DECODING TECHNIQUE

• Main Authors: SHARIFAH K., KAHARUDIN DIMYATI, AZLINA IDRIS, SYED YUSOF
• Format: Article
• Language: English
• Published: Taylor's University 2011-12-01
• Series: Journal of Engineering Science and Technology
• Subjects: Intercarrier interference self cancellation; Space time frequency block code; Linear maximum likelihood Alamouti combiner; Signal to noiseratio; Frequency offset
• Online Access: http://jestec.taylors.edu.my/Vol%206%20Issue%206%20December%2011/Vol_6_6_664-673_azlina_idr.pdf

This paper presents a new subcarrier mapping scheme ICI-SC technique that use Linear Maximum Likelihood Alamouti Combiner (LMLAC) as a decoding technique to mitigate intercarrier interference (ICI) problem with low complexity decoding system for space time frequency block codes (STFBC) orthogonal frequency division multiplexing (OFDM) in the frequency selective environments. We provide details of the mathematical models of the proposed scheme and simulate its error performance caused by frequency offset (FO). We also analyze the impact of the STFBC of the system. The simulation results showed that the scheme has the ability to reduce ICI effectively with a low decoding complexity and maximum diversity in terms of bandwidth efficiency and also in the bit error rate (BER) performance especially at high signal to noise ratio.