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.
On the research of coordinated multi-point MIMO systems, a new precoding scheme is proposed for maximizing the weighted sum rates. Construction of the objective function is based on convex optimization theory and the solution to the precoding vector is depended on iterative algorithm. Compared with existing algorithms, the application of the algorithm is not limited to the number of transmit and receive...
This paper proposed an adaptive codebook design method based on codebook rotation, without changing the existing base matrix of the codebook,and according to the statistics and estimation results of the BER and SINR, to generate a new set of rotation matrix codebook. Moreover, combing with the overhead of the feedback and the original base codebook matrix, to constitute a matrix of pairs of codebook...
Based on the analysis of preceding principle in MIMO-OFDM system, an improved codebook design method is presented in this paper. Combing direct quantization method and Householder matrix, the proposed schemes has a better tradeoff performance than traditional quantization method. Simulation result s also shows a better performance than traditional method especially in 3 and 4 transmit antennas.
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.