NAVIGATION PATTERN MINING ALGORITHM FOR CONTENT BASED IMAGE RETRIEVAL
Published In: 1ST INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTER, ELECTRONICS AND ELECTRICAL ENGINEERING
Author(s): K. RAMESH KUMAR , T. SELVAGANAPATHY
Abstract: In this paper, we developed a new State-Drop Fast Sequence Estimation (SDFSE) strategy for Trellis Coded Modulation (TCM) schemes for transmission in the Inter symbol Interference (ISI) environment. For the decoding of TCM signals in the presence of Additive White Gaussian Noise (AWGN), Maximum Likelihood Sequence Estimation (MLSE) has been considered as the optimum solution [13, 16, 17, 19]. However, for band-limited ISI channels in the presence of AWGN, the complexity of optimum MLSE increases as a function of the ISI channel memory length. This prohibits practical implementation of MLSE. Over the past decades, a spurious research took place in the development of reduced complexity suboptimum decoding strategies for TCM schemes. Reduced State Sequence Estimation (RSSE) is one such implementation which emphasizes on reduced computational complexity Likelihood sequence estimation by minimizing the ISI-code trellis states [23]. We provide a new suboptimum decoding strategy, a reduced co
- Publication Date: 12-Mar-2012
- DOI: 10.15224/978-981-07-1847-3-655
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SMART ANTENNA TECHNIQUE FOR PERFORMANCE IMPROVEMENT OF CDMA & MC -CDMA
Published In: 1ST INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTER, ELECTRONICS AND ELECTRICAL ENGINEERING
Author(s): AAMIR SHAIKH , S.P.WADKAR , SIRAJ PATHAN
Abstract: To improve coverage and performance in the CDMA as well as in MC-CDMA network, the simulation model and an evaluation method for the smart antenna system in the CDMA system is presented. Here the data service users as well as the voice services users are considered. The proposed method that can show the impact of smart antenna system on the Ec/Io coverage area and radius also presented as function of antenna type and beamwidth.The performance improvements are remarkable in the smart antenna systems. The performance of the system is evaluated in terms of Average Ec/Io, Area, Radius, Ec/Io Difference, Throughput with Number of users per sector. Both results are discussed based on various parameters like flat urban type morphology, Okumura Model for omni directional antennas air link, orthogonality factor and antenna beam width.
- Publication Date: 12-Mar-2012
- DOI: 10.15224/978-981-07-1847-3-726
- Views: 0
- Downloads: 0