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Concurrent-access dual-band terminal operating in two adjacent bands

A frequency band and terminal technology, applied to audio or data signal terminals, high-speed video transmission field, can solve problems such as the absence of MIMO terminals

Inactive Publication Date: 2013-10-09
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although in the scope of 3G or 4G mobile technology there are base stations that implement the division of the frequency band into sub-bands allocated to users, as described in patent application US2010 / 0166098, there is currently no simultaneous use of 5 GHz due to the frequency proximity of the frequency channels MIMO terminals for two frequency channels in the frequency band

Method used

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  • Concurrent-access dual-band terminal operating in two adjacent bands
  • Concurrent-access dual-band terminal operating in two adjacent bands
  • Concurrent-access dual-band terminal operating in two adjacent bands

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Embodiment Construction

[0025] The invention will be described in the context of a terminal of a MIMO wireless transmission system operating in the 5GHz WiFi band, said terminal being able to transmit and / or receive at least two signals simultaneously in this band.

[0026] The 5GHz frequency band consists of two sub-bands: the first sub-band runs from 5.150GHz to 5.350GHz, known as the low sub-band; the second sub-band runs from 5.470GHz to 5.725GHz (for Europe), or from 5.470GHz to 5.835GHz (for ), known as the high sub-band. The two sub-bands, the low sub-band and the high sub-band, are close together and separated by only 120 MHz, which requires the implementation of efficient radio frequency filtering components in the transmit and receive channels of the terminal. Note that the authorized power levels for transmission in the 5GHz band depend on the sub-band (low or high) and the region where the transmitting system is deployed. For some parts of the upper and lower sub-bands, the authorized po...

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Abstract

The present invention relates to a terminal for the broadband transmission of video, audio or data signals in a domestic environment. It applies more specifically in the scope of terminals operating according to the standard IEEE 802.11n and employing simultaneously several frequency channels in a predetermined band of frequencies, for example the 5 GHz WiFi band. The terminal comprises M antennas, a MIMO device able to generate MIMO signals in said predetermined frequency band from baseband signals or conversely, said MEMO device being able to process N MIMO signals simultaneously, and a switching device to connect the MIMO device to the M antennas. According to the invention, the NINO device comprises two MIMO circuits, one operating in a first sub-band of the predetermined band and the other in a second sub-band of the predetermined band, the two sub bands being non-overlapping and the switching device is adapted to connect said two MIMO circuits to the antennas so that each of said M antennas is able to receive or transmit one of the MIMO signals of the first MIMO circuit and to receive or transmit one of the MIMO signals of the second MIMO circuit simultaneously. The switching device also comprises a filtering device associated with each antenna in order to isolate, in reception, the MIMO signal of the first sub-band of the MIMO signal from the second sub-band received or transmitted by said antenna.

Description

technical field [0001] The present invention relates to a terminal for high-speed transmission of video, audio or data signals in a home environment. It applies more specifically in the framework of terminals operating according to standard IEEE 802.11 and employing multiple frequency channels simultaneously. Background technique [0002] WiFi technology according to standard IEEE802.11a / b / g or 11n is currently the most commonly used technology for high-speed wireless transmission in a home environment. Standard IEEE802.11n provides certain improvements over IEEE802.11a / b / g. Note that it authorizes the use of MIMO (Multiple-Input Multiple-Output) technology that enables improved transmission bit-rates and their robustness in environments such as high-interference domestic environments multi-antenna technology. [0003] The standard IEEE802.11n operates in the frequency band 2.4-2.5 GHz and in the frequency band 4.9-5.9 GHz. These two frequency bands are referred to as th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/44H04B7/04
CPCH04B1/44H04B7/0404H04B7/0413H04B7/08
Inventor J-Y.勒瑙尔J-L.罗伯特D.洛海因童A.洛齐尔
Owner THOMSON LICENSING SA