منابع مشابه
Block Layering Approach in TAST Codes
Threaded Algebraic Space Time (TAST) codes developed by Gamal et al. is a powerful class of space time codes in which different layers are combined and separated by appropriate Diophantine number . In this paper we introduce a technique of block layering in TAST codes, in which a series of layers (we call it Block layers) has more than one transmit antenna at the same time instant. As a result...
متن کاملDelay tolerant (delto) distributed TAST codes for cooperative wireless networks
In a distributed cooperative communication system, as the distances between different relay nodes and the receiving nodes may be different, so the performances of distributed space time codes at receiving nodes may badly be degraded if timing synchronization is not assured. In this article, extending the work of Damen et al. we introduce the design of distributed threaded algebraic space-time (...
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In this paper, we introduce a novel Trademark Application Assistant (TAST) that aims to speed up the process of a successful trademark application. The core of TAST is a web-browser based integrated image content editing and similarity-based retrieval system accessing local and remote databases of coded trademark images. Potential users of TAST include the party that initiates a request for tra...
متن کاملSpace-Time Block Codes Versus Space-Frequency Block Codes
— In wireless broadband systems the available time, frequency and spatial diversity can be exploited using complex space-time-frequency codes. However, in order to retain a flexible scheme with low complexity we prefer a concatenated system where a channel code picks up time and frequency diversity and a simple orthogonal design is used to obtain spatial diversity. The channel needs to be const...
متن کاملA New Approach to Layered Space-Time Code Design
The block layered space-time codes, with the intent of simultaneously achieving high coding gain and high code rate, have been suggested. These codes are based on the design principles of existing layered space-time codes and space-time block codes. The previously known concept of a layer has been modified to a block layer wherein a block layer has more than one antenna transmitting at the same...
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ژورنال
عنوان ژورنال: International Journal of Communications, Network and System Sciences
سال: 2010
ISSN: 1913-3715,1913-3723
DOI: 10.4236/ijcns.2010.310105