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Radio communication system and transmitting apparatus used for the same

US8995540B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8995540-B2
Application numberUS-98898509-A
CountryUS
Kind codeB2
Filing dateApr 22, 2009
Priority dateApr 22, 2008
Publication dateMar 31, 2015
Grant dateMar 31, 2015

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

To provide a system that can accommodate a greater number of terminals within a limited band and can obtain a higher transmission rate. While the number of frequency signals (spectrums) output in parallel by performing a spread spectrum from the DFT unit of each terminal is 12, the number of sub-carriers constituting one sub-channel is set at 10 or 11. In this case, the users (users A and G) allocated to the sub-channels at both ends of the band will not perform transmission of one frequency signal at the end (one sub-carrier) of all the frequency signals output from the DFT unit, whereas the users (users B to F) allocated to the other sub-channels will not perform transmission of the frequency signals at the ends (two sub-carriers). This transmission can be realized by deleting (clipping) the associated number of signals from both ends or from one end of the frequency signals output from the DFT unit of each terminal and allocating the frequency signals after clipping, to individual sub-channels.

First claim

Opening claim text (preview).

The invention claimed is: 1. A radio communication system comprising: a transmitting apparatus that generates a first spread spectrum signal by performing a spread spectrum of a time-domain information signal and transmits the spread spectrum transmitting signal with allocating the spread spectrum transmitting signal to any one of a plurality of contiguous frequency channels defined in a constant frequency band formed of a plurality of sub-carriers and to any one of a plurality of…

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Frequently asked questions

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What does patent US8995540B2 cover?
To provide a system that can accommodate a greater number of terminals within a limited band and can obtain a higher transmission rate. While the number of frequency signals (spectrums) output in parallel by performing a spread spectrum from the DFT unit of each terminal is 12, the number of sub-carriers constituting one sub-channel is set at 10 or 11. In this case, the users (users A and G) al…
Who is the assignee on this patent?
To Shimpei, Kubota Minoru, Hamaguchi Yasuhiro, and 6 more
What technology area does this patent fall under?
Primary CPC classification H04W72/563. Mapped technology areas include Electricity.
When was this patent published?
Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).