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Title of the Paper: Multiple-valued Logic Approach to Fuzzy Controllers Implementation
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Authors: V. Varshavsky, V. Marakhovsky, I. Levin, H. Saito
Abstract: This paper offers a new technique for designing fuzzy controllers as analog hardware devices on
bases of CMOS implementation of multi-valued logical functions. This approach is based on using a summing
amplifier with saturation as a building block that can be considered as a multi-threshold logical element. The
functional completeness in an arbitrary-valued logic of a summing amplifier with saturation is proven. This fact
gives a theoretical background for an analog implementation of fuzzy devices. In contrast with the traditional
software approach to fuzzy controller implementations based on explicit fuzzification, fuzzy inference, and
defuzzification procedures, hardware implementations of fuzzy controllers as analog devices have advantages
of higher speed, lower power consumption, smaller die area and more. Universal and proper design methods for
such type of hardware are offered. The paper illustrates design examples for real industrial fuzzy controllers
and provides SPICE simulation results of their functioning.
Keywords: Fuzzy Logic, Fuzzy Controller, Fuzzy rules, Fuzzy inference, Fuzzification and Defuzzification,
Multi-Valued Logic, Multi-threshold Element, Functional Completeness, Summing Amplifier.
Title of the Paper: Performance Analysis of A Beyond 3G Mobile Communication System in
the Presence of Co-channel Interference
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Authors: Anas M. Salhab and Ghandi F. Manasra
Abstract: This paper presents a new model for systems beyond 3G of cellular communication techniques. The
proposed scheme includes several new techniques: multiple-input multiple-output (MIMO), orthogonal frequency
division multiplexing (OFDM), and smart antennas (beamforming). The performance analysis was done in an
interference-rich environment, and closed form expression for SINR was also determined. The results proved the
effectiveness of the proposed system, particularly, in the presence of co-channel interference (CCI).
Keywords: Co-channel Interference, Beamforming, Multiple-Input Multiple-Output (MIMO), Orthogonal
Frequency Division Multiplexing (OFDM), Code-Division Multiple Access (CDMA), Frequency Selective
Channel.
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