Topic
Division (mathematics)
About: Division (mathematics) is a research topic. Over the lifetime, 12717 publications have been published within this topic receiving 87814 citations.
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TL;DR: In this paper the systematic construction of fully diverse STBCs from nonassociative algebras is discussed, employing nonassociationative quaternion division algebraes.
Abstract: Associative division algebras are a rich source of fully diverse space-time block codes (STBCs). In this paper the systematic construction of fully diverse STBCs from nonassociative algebras is discussed. As examples, families of fully diverse $2\times 2$, $2\times 4$ multiblock and $4\x 4$ STBCs are designed, employing nonassociative quaternion division algebras.
18 citations
01 Dec 2014
TL;DR: The impact of the increase of the number of LP modes supported by few-mode fibers on their main characteristics is investigated, pointing out the limiting factors of this increase.
Abstract: We investigate the impact of the increase of the number of LP modes supported by few-mode fibers on their main characteristics, pointing out the limiting factors of this increase.
18 citations
Patent•
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TL;DR: This invention relates to motor vehicles and refers more particularly to improvements in body structures of motor vehicles, and is a division of our application Serial No 10,402, filed March 11, 1935 as mentioned in this paper.
Abstract: This invention relates to motor vehicles and refers more particularly to improvements inbody structures of motor vehicles, and is a division of our application Serial No 10,402, filed March 11, 1935 It is an object of our Invention to provide a motor vehicle body structure having improved
18 citations
Patent•
04 Jul 1977
TL;DR: In this paper, an accurate easy to see display for various information even for small spaced output sector of small-sized information apparatus such as wristwatch, etc. by securing division display in terms of time through appropriate division of information.
Abstract: PURPOSE:To realize accurate easy-to-see display for various information even for small spaced output sector of small-sized information apparatus such as wristwatch, etc. by securing division display in terms of time through appropriate division of information.
18 citations
Patent•
17 Feb 2006TL;DR: In this paper, an OFDM-based multiple access system is proposed to provide strong persistence against selective frequency fading and further provide suppression of inter-cell interference by using cell differentiating scrambling codes.
Abstract: An OFDM based multiple access system provides strong persistence against selective frequency fading and further provides suppression of inter-cell interference by using cell differentiating scrambling codes. Thus, the OFDM system maximizes frequency reuse rate. The present invention includes an OFDM modulator (30) frequency-division-multiplexing data to be transmitted, a code division unit (32) multiplexing the frequency-division-multiplexing data with a prescribed code, and an RF end (33) converting the data multiplexed by the code division unit to a radio frequency signal to tansmit. Accordingly, the present invention raises the degree of freedom (frequency division, time division, code division) of system implementation in the multiple access system. The OFDM system includes the scambling of the downlink data by different scrambling codes by a cell unit for base stations within at least two neighboring cells to identify the respective cells and transmitting the spread downlink data.
18 citations