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.
Due to the imperfection of transmitter and receiver, Adjacent Channel Interference (ACI) can't be completely avoided when two systems share the adjacent frequency band. This paper investigates the impact of ACI between TD-SCDMA and TD-HSDPA systems operating in macro cell. In stimulation, smart antenna technology is employed and its performance is investigated. Furthermore, the key technologies, Adaptive...
Multi-cell transmission in single frequency networks (SFN)area for MBMS can be used to improve the system performance. This paper proposes a novel virtual hybrid automatic repeat request (V-HARQ) mechanism for multi-cell MBMS transmission in the UMTS networks, by which multiple signals like the retransmission versions of HARQ mechanism in unicast mode from different cells can be received and combined...
Hybrid automatic repeat request (HARQ) protocol typically operates in multi-process stop-and-wait (SAW) mode to fully utilize channel capacity. A prior packet, due to retransmission(s), may arrive at the receiving side later than the packets that follow it but use other HARQ processes, thus leading to out-of-order reception. Medium access control (MAC) layer is responsible for packet reordering operations...
We develop and analyze an ARQ (Automatic Repeat reQuest) initialized transmit diversity protocol for cooperative communications. Medium access control (MAC) layer packet retransmission limit (similar to aShortRetryLimit or aLongRetryLimit in 802.11-1997) has been used as an actuator for transmit cooperative diversity initialization. We take the channel state information (CSI) as a function of retransmission...
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.