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In this paper we propose fast and efficient transmit antenna selection algorithms for wireless spatial multiplexing (SM) systems with linear receivers. Motivated by matrix inverse properties, a recursive matrix inverse calculation is developed for fast transmit antenna selection. Two selection criteria are proposed based on the recursive matrix inverse updating: one is the minimum mean square error...
In this paper, we study low complexity double space time transmit diversity (D-STTD) and orthogonal frequency division multiplexing (OFDM) system with antenna shuffling. We propose a novel antenna shuffling method based on the criterion of minimizing the condition number of channel correlation matrix. The condition number is an indicator about the quality of the channel. By selecting the minimum of...
A design of e-Learning environment is described for personalized adaptability. At first, we explain the whole system of our learning management system, WebClass RAPSODY, which has been developed to stand up to use by whole students in a university In this topic, there are two points, 1) infrastructure construction/maintenance in university, 2) improvement of LMS to use it for official lecture of university...
This paper shows an inter-cell interference suppression effect using a chip correlation MMSE receiver with multipath interference correlative timing (MICT) or CCMRM, which is our previously proposed method. Since a chip correlation matrix used by the CCMRM method is obtained from a correlation of received chip data before despreading which contains signals from own cell and interference cell base...
This paper proposes a sign bit chip correlation MMSE receiver with multipath interference correlative timing or sign bit CCMRM for downlink direct sequence code division multiple access (DS-CDMA). The proposed method significantly reduces the associated complexity without degrading the BER performance by using sign bit chip correlation and appropriate compensation for the elements of the sign bit...
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