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(12) United States Patent
Yeh et al.
(io) Patent No.: (45) Date of Patent:
US 7,925,234 B2 Apr. 12, 2011
(54) METHOD FOR MAXIMAL RATIO
COMBINING OF SPATIALLY FILTERED
SIGNALS AND APPARATUS THEREFOR
(75) Inventors: Choong-Il Yeh, Daejeon (KR); Jae-Joon Park, Daejeon (KR); Chul-Sik Yoon,
(73) Assignees: Samsung Electronics Co., Ltd., Suwon-si (KR); Electronics and Telecommunications Research Institute, Daejeon (KR); KT Corporation, Seongnam (KR); SK Telecom Co., Ltd., Seoul (KR); Hanaro Telecom, Inc., Seoul (KR)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 576 days.
(21) Appl.No.: 12/088,109
PCT Filed: Sep. 28, 2006
PCT No.: PCT/KR2006/003883
The present invention relates to a maximum ratio combining method of spatial-filtered received signals and an apparatus using the same. For this purpose the present invention provides a method for receiving signals by using a plurality of antennas that form a linear array antenna, multiplying a plurality of weight vectors by the received signals, summing the multiplication results for each weight vector, and combining the summing results by using maximum ratio combining. According to the present invention, signals are dividedly received by applying spatial filtering for a receiving direction of each signal and performance can be improved by combining the received signals by using maximum ratio combining. In addition, performance of an MRC-rake and a beam forming gain can be simultaneously acquired according to the present invention.
11 Claims, 4 Drawing Sheets
U.S. PATENT DOCUMENTS
6,801,564 B2 10/2004 Roupheletal.
6,892,059 Bl 5/2005 Kim et al.
6,917,337 B2 7/2005 Iidaetal.
6,917,340 B2 7/2005 Lindenmeier
7,013,165 B2* 3/2006 Yoon et al 455/561
7,092,690 B2* 8/2006 Zancewicz 455/273
7,139,328 B2* 11/2006 Thomas et al 375/299
7,167,526 B2* 1/2007 Liang etal 375/267
7,236,478 B2 * 7,623,563 B2 * 2004/0043795 Al * 2004/0204111 Al* 2005/0101353 Al * 2006/0148525 Al * 2009/0239551 Al *
* cited by examiner
6/2007 \\ u cl al 370/334
11/2009 Jwaetal 375/144
3/2004 Zancewicz 455/562.1
10/2004 Ylitalo 455/562.1
5/2005 Zeiraetal 455/562.1
7/2006 Moon etal 455/562.1
9/2009 Woodsum 455/456.1
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