MIMOmatch-A IP portfolio

Name of the intellectual property portfolio: MIMOmatch-A.

Sectors: wireless communications, high-performance computing (servers), chip manufacturing.
Technical areas: MIMO radio transmission, wireless receiver using multiple antennas, high-speed electrical interconnections, signal integrity.

Title of the patent family Family
Multiple-input and multiple-output amplifier P30
Multiple-input and multiple-output amplifier using mutual induction in the feedback network P33
Method and device for radio reception using a plurarity of antennas P34
Multiple-input and multiple-output amplifier having pseudo-differential inputs P41

This portfolio is no longer offered for sale, effective 28 september 2012. To obtain publicly available information on assignments, please click in the "Patent or PCT publ. No." column below.

This portfolio comprises the items listed in the following table. To obtain the latest relevant document, click in the "Item ID" column.

Item ID Jurisdiction Application No. Filing date Patent or PCT publ. No. Issue Date Family
P30-A France 06/00388 17 Jan 2006 FR 0600388 31 Oct 2008 P30
P30-B PCT PCT/IB2006/003950 19 Dec 2006 WO 2007/083191 N/A
P30-C USA 12/096,701 9 Jun 2008 US 7,642,849 5 Jan 2010
P33-A France 06/05633 23 Jun 2006 FR 0605633 29 Aug 2008 P33
P33-B PCT PCT/IB2007/001344 26 Apr 2007 WO 2008/001168 N/A
P33-C USA 12/301,929 21 Nov 2008 US 7,940,119 10 May 2011
P34-A France 06/06502 18 Jul 2006 FR 0606502 28 Nov 2008 P34
P34-B PCT PCT/IB2007/001589 5 Jun 2007 WO 2008/010035 N/A
P34-C USA 12/301,952 21 Nov 2008 US 7,983,645 19 July 2011
P41-A France 08/03982 11 Jul 2008 FR 0803982 28 Oct 2011 P41
P41-B PCT PCT/IB2009/051358 31 Mar 2009 WO 2010/004445 N/A
P41-C USA 12/955,381 29 Nov 2010 US 7,952,429 31 May 2011


     The patent families P30, P33, P34 and P41 may be applied to wireless receivers using multiple antennas such as the one used in multiple-input and multiple-output (MIMO) radio transmission schemes used in cellular network and WLANs. The combination of these inventions is useful for designing more compact wireless communication systems, because it can be used to reduce the distance between the antennas. For instance, more antennas may be packed into a mobile phone or laptop, to obtain more bandwidth. These inventions may be applied to all standards implementing MIMO radio transmission. They are not intended for a particular standard, because they apply to the analog section of a receiver and may provide a higher SNR and lower signal correlations in all MIMO systems. However, the MIMOmatch-A portfolio is most useful for standards using a large number of antennas, such as 3GPP LTE-Advanced (LTE-A) and IEEE 802.11ac, which include 8x8 MIMO configurations.

     In addition to their own merits, these inventions may also be used to avoid infringing (or paying royalties for) patents relating to wireless receivers for MIMO transmission using multiple independent single-input and single-output (SISO) front-ends. A short presentation of the application of these inventions to wireless transmission is available at Section 3 of this page. Several peer-reviewed technical articles published on this subject may be downloaded here. In most cases, these inventions require no added circuit element compared to a conventional design. Improving the performance of radio receivers using these inventions is one of the way of making wireless communication networks more energy efficient.

     It is also important to observe that chip manufacturers might be unable to avoid infringing P33 as soon as they start packing several low noise amplifiers (LNAs) into the same chip to achieve cost reduction. For instance, if a single CMOS chip contains the front-end of a radio receiver for MIMO transmission, multiple LNAs each using a source degeneration inductor are built at a small distance from one another. This configuration is likely to be covered by P33, even if the inductive coupling between the degeneration inductors is not intentionally created to implement P34.

     The patent families P30, P33 and P41 may also be applied to the ZXtalk and ZXnoise techniques for the reduction of crosstalk and echo in electrical interconnections such as the one used in a system in package (SiP), a multi-chip module (MCM) or a printed circuit board (PCB). This specialized field of R&D is very active in the semiconductor industry. Explanations relating to this important application may be found in the technical articles [B66] and [B77] of Excem, which can be downloaded here. Excem also offers two Seminars and a free electronic book presenting the technical background for assessing and implementing this technology.

     For a conference with technical experts, please contact us. We can also provide several reports relating to these inventions.

Back to the home page

Back to Selling inventions

Web site: tekcem.com
URL: http://www.tekcem.com/tekclot1.htm © Tekcem 2010, 2015
Last update: 18 February 2015 reply to: webmaster@tekcem.com