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.
Practical full-duplex MIMO relays require efficient mitigation of the relay self-interference signal propagating from the transmit antenna array to the receive antenna array; this paper concentrates on time-domain cancellation (TDC) and spatialdomain suppression by null-space projection (NSP). Both schemes can eliminate all self-interference in the idealistic case where the relay has perfect side...
This paper proposes a closed-loop beamforming algorithm for MIMO systems employing quasi-orthogonal space-time block codes (QOSTCB) and low rate feedback channels over slowly fading channels. A recursion is formulated using a stochastic signed gradient approximation, where the receiver employs a single feedback bit to command the transmit antenna weights adaptation, at a frequency much lower than...
This letter derives new gain control schemes for an amplify-and-forward single-frequency relay link in which loop interference from the relay transmit antenna to the relay receive antenna has to be tolerated. The proposed gain control schemes take into account the effect of residual loop interference that remains after imperfect loop interference cancellation. As a result of our gain control strategy,...
This work presents a transmission strategy for closed-loop MIMO systems, where compact feedback messages meant for transmit weight adaptation are also used to convey basic link adaptation requests that can improve the link reliability or the data throughput without additional feedback overhead. The proposed link adaptation varies the number of orthogonal transmit beams and the symbol modulation employed...
This work proposes a novel adaptive transmit beamforming algorithm, suitable for single-beam multiple-input multiple-output (MIMO) systems employing closed-loop feedback channels with low rate. A low computational complexity solution is achieved by means of a partial update strategy, in which only one of the complex baseband weights of the transmit antenna array is modified at each instance. The new...
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.