The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, two precoding algorithms based on channel orthogonalization have been proposed for multi-user MIMO downlink systems. Unlike other conventional methods, the first scheme obtains the orthonormal basis to achieve the precoding matrix by means of using Schmidt Orthogonalization method. In this way, the co-channel interference can be eliminated to some degree. The second algorithm increases...
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...
In this paper, we propose several power control schemes for MIMO systems using spatial multiplexing (SM) with a minimum mean square error (MMSE) receiver under slow fading, to improve the bit error rate (BER) performance, both for an individual link and within a cellular system. After comparing the performance of these proposed power control schemes, we find that a further scheme which effectively...
In this paper, we study low complexity transceiver for double space time transmit diversity (D-STTD) and orthogonal frequency division multiplexing (OFDM) system with antenna shuffling. We utilize a simple antenna shuffling method based on the criterion of minimum mean square error (MMSE). We propose an algorithm to reduce the amount of feedback by exploiting the fact that the channel frequency responses...
In this paper, we study a practical design for hybrid space-time block coding (STBC) and spatial multiplexing (SM) with orthogonal frequency division multiplexing (OFDM) systems. The hybrid STBC-SM OFDM systems can achieve both spatial diversity and multiplexing gains simultaneously in frequency selective MIMO channels. For the hybrid designs, zero forcing (ZF) and minimum mean square error (MMSE)...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.