Source: http://www.google.com/patents/US7388924?dq=6101531
Timestamp: 2014-12-22 03:17:28
Document Index: 726422126

Matched Legal Cases: ['Application No. 60', 'art 16', 'art 11', 'art 16', 'art 11', 'art 11']

Patent US7388924 - Method and apparatus for equalization and decoding in a wireless ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA baseband processor comprising a demodulator that generates channel state information and a maximum ratio combining (MRC) symbol from a received symbol, wherein the received symbol includes modulated data and is spread across plural receive pathways. A Viterbi decoder comprises a branch metric calculator...http://www.google.com/patents/US7388924?utm_source=gb-gplus-sharePatent US7388924 - Method and apparatus for equalization and decoding in a wireless communications system including plural receiver antennaeAdvanced Patent SearchPublication numberUS7388924 B1Publication typeGrantApplication numberUS 11/449,502Publication dateJun 17, 2008Filing dateJun 8, 2006Priority dateFeb 15, 2002Fee statusPaidAlso published asUS7065146, US7646821Publication number11449502, 449502, US 7388924 B1, US 7388924B1, US-B1-7388924, US7388924 B1, US7388924B1InventorsHui-Ling Lou, Kok-Wui CheongOriginal AssigneeMarvell International Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (17), Non-Patent Citations (13), Referenced by (3), Classifications (15), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for equalization and decoding in a wireless communications system including plural receiver antennaeUS 7388924 B1Abstract A baseband processor comprising a demodulator that generates channel state information and a maximum ratio combining (MRC) symbol from a received symbol, wherein the received symbol includes modulated data and is spread across plural receive pathways. A Viterbi decoder comprises a branch metric calculator that computes a plurality of branch metrics based on the channel state information associated with the received symbol and the MRC symbol and a most-likely symbol estimator that estimates a clean symbol based on the plurality of branch metrics.
H ⋓ k , n = ∑ m = 0 D - 1 ( g ( m ) ) - 2  H ~ k , n ( m )  2 . 9. The baseband processor of claim 1 wherein the received symbol comprises an OFDM symbol formatted in compliance with at least one of IEEE 802.11a, IEEE 802.1g, and IEEE 802.16a standards.
H ⋓ k , n = ∑ m = 0 D - 1 ( g ( m ) ) - 2  H ~ k , n ( m )  2 . 21. The method of claim 15 wherein the received symbol comprises an OFDM symbol formatted in compliance with at least one of IEEE 802.11a, IEEE 802.11g, and IEEE 802.16a standards.
CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 10/259,024 filed on Sep. 26, 2002, which application claims priority benefit under 35 U.S.C. � 119(e)(1) to U.S. Provisional Application No. 60/357,317, filed on Feb. 15, 2002, entitled �ON DIVISION-FREE FREQUENCY DOMAIN EQUALIZATION AND VITERBI DECODING USING CHANNEL STATE INFORMATION�. The disclosures of the above applications are incorporated herein by reference.
( H k , n , 0 � v k , n , 0 + H k , n , 1 � v k , n , 1 )  H k , n  ( 14 ) and
X _ k , n = Y k , n H _ k , n = X k , n + v k , n H _ k , n , where Xk,n,iγ{�1} for QPSK, Xk,n,iε{�3,�3} for 16-QAM, and Xk,n,iε{�1,�3,�5,�7} for 64-QAM constellations, and iε{0,1} represents the in-phase (I) and quadrature (Q) components of Xk,n. In this case, the hard-decision decoded symbol, Dec{ X k,n}, can be computed by rounding X k,n,i to its corresponding nearest constellation point, Xk,n,i, in each dimension.
if (Z k,n,i≧0), Dec{ X k,n,i}=1,otherwise, Dec{ X k,n,i}=−1.
if ((|Z k,n,i|−2| H k,n|2)≦0), Dec{ X k,n,i}=�1,otherwise, Dec{ X k,n,i}=�3.
if ((|Z k,n,i|−2| H k,n|2)≦0), Dec{ X k,n,i}=�1, exit;if ((|Z k,n,i|−3| H k,n|2)≦0), Dec{ X k,n,i}=�3, exit;if ((|Z k,n,i|−6| H k,n|2)≦0), Dec{ X k,n,i}=�5, exit;Dec{ X k,n,i}=�7. exit; The sign is dependent on the sign of Zk,n,i.
if (P k,n,i≧0), Dec{ X k,n,i}=1,otherwise, Dec{ X k,n,i}=−1.
if ((|P k,n,i|−2| H k,n|)≦0), Dec{ X k,n,i}=�1,otherwise Dec{ X k,n,i}=�3.
if ((|P k,n,i|−2| H k,n|)≦0), Dec{ X k,n,i}=�1, exit;if ((|P k,n,i|−4| H k,n|)≦0), Dec{ X k,n,i}=�3, exit;if ((|P k,n,i|−6| H k,n|)≦0), Dec{ X k,n,i}=�5, exit;Dec{ X k,n,i}=�7. exit; The sign is dependent on the sign of Pk,n,i.
X _ k , n = X k , n + ∑ d = 0 D - 1 H k , n ( d ) * v k , n ( d ) ∑ d = 0 D - 1  H k , n ( d )  2 ( 39 ) This signal is demodulated, and the I and Q components,
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No. 10/259,142, filed Sep. 26, 2002, Lou et al.13Van Nee, Richard et al., OFDM for Wireless Multimedia Communications, Jan. 2000, Artech House Publishers, US.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8126074Jan 12, 2010Feb 28, 2012Marvell International Ltd.Method and apparatus for equalization and decoding in a wireless communications system including plural receiver antennaeUS8494068Feb 20, 2012Jul 23, 2013Marvell International Ltd.Method and apparatus for equalization and decoding in a wireless communications system including plural receiver antennaeUS8731085Jul 22, 2013May 20, 2014Marvell International Ltd.Method and apparatus for equalization and decoding in a wireless communications system including plural receiver antennaeClassifications U.S. Classification375/262, 375/341International ClassificationH04L27/06, H04L23/02Cooperative ClassificationH04L25/03286, H04L25/03292, H04L25/0206, H04L25/0328, H04B7/0857, H04L2025/03414, H04L1/0054, H04L2025/03522European ClassificationH04L25/03B7E5, H04B7/08C4J3, H04L1/00B5LLegal EventsDateCodeEventDescriptionDec 19, 2011FPAYFee paymentYear of fee payment: 4Jun 16, 2009CCCertificate of correctionRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google