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Patent US7688898 - Adaptive channel bandwidth selection for MIMO wireless systems - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA wireless communications device for a multiple input multiple output (MIMO) wireless communications system. The wireless communication device includes a radio frequency (RF) transceiver including at least two antennae. A medium access control (MAC) device to dynamically adjust a bandwidth of the wireless...http://www.google.com/patents/US7688898?utm_source=gb-gplus-sharePatent US7688898 - Adaptive channel bandwidth selection for MIMO wireless systemsAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7688898 B1Publication typeGrantApplication numberUS 12/480,179Publication dateMar 30, 2010Filing dateJun 8, 2009Priority dateMay 14, 2003Fee statusPaidAlso published asUS7545867, US8238453, US8634483, US9042466Publication number12480179, 480179, US 7688898 B1, US 7688898B1, US-B1-7688898, US7688898 B1, US7688898B1InventorsHui-Ling Lou, Kok-Wui Cheong, Randy TsangOriginal AssigneeMarvell International Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (13), Non-Patent Citations (34), Referenced by (7), Classifications (15), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetAdaptive channel bandwidth selection for MIMO wireless systems
US 7688898 B1Abstract
H = [ h 11 h 12 … h 1 M h 21 h 22 … h 2 M ⋮ ⋮ ⋮ ⋮ h N 1 h N 2 … h NM ] , where hij is the complex gain of a channel between the jth antenna of a transmitting wireless communications device and the ith antenna at a receiving wireless communications device. The complex gain may be expressed as hij=αjβ=|hij|·ejθ ij . Complex gain terms of |hij| are typically Rayleigh distributed in a rich-scattering environment where LOS does not exist between pairs of antennae at local and wireless communications devices.
C = log 2 ( det [ I N + ( ρ M ) HH * ] ) , where H* is the complex conjugate transpose of H and IN is the N×N identity matrix. In the term
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SAC-2, No. 4, Jul. 1984, pp. 528-539.33Winters, "Smart Antennas for Wireless Systems", IEEE Personal Communications, Feb. 1998, pp. 23-27.34Wolniansky/Foschini/Golden/Valenzuela, "V-BLAST: An Architecture for Realizing Very High Data Rates Over the Rich-Scattering Wireless Channel", 1998 IEEE, pp. 295-300.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7978636 *Mar 27, 2007Jul 12, 2011Hitachi, Ltd.System and method for controlling throughput of access classes in a WLANUS8238453 *Mar 29, 2010Aug 7, 2012Marvell International Ltd.Adaptive channel bandwidth selection for MIMO wireless systemsUS8824586Mar 5, 2012Sep 2, 2014Taqua Wbh, LlcAntenna pointing for multiple-input-multiple-out (MIMO) devicesUS9344535 *Feb 23, 2010May 17, 2016Broadcom CorporationMultiple protocol wireless communications in a WLANUS20080240049 *Mar 27, 2007Oct 2, 2008Sudhanshu GaurSystem and method for controlling throughput of access classes in a wlanUS20100142505 *Feb 23, 2010Jun 10, 2010Broadcom CorporationMultiple protocol wireless communications in a wlanWO2013133921A1 *Feb 1, 2013Sep 12, 2013Taqua Wbh, LlcAntenna pointing for multiple-input-multiple-out (mimo) devices* Cited by examinerClassifications U.S. Classification375/259International ClassificationH04L27/00Cooperative ClassificationH04B1/38, H04L5/003, H04L2025/03426, H04L1/0002, H04L1/0625, H04B7/0413, H04B7/0891, H04L25/03343, H04L5/0003European ClassificationH04L5/00A2, H04L5/00C, H04L25/03B9, H04L1/00A1Legal EventsDateCodeEventDescriptionSep 30, 2013FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services