WO2004088856A3 - Walsh-hadamard decoder - Google Patents

Walsh-hadamard decoder Download PDF

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Publication number
WO2004088856A3
WO2004088856A3 PCT/US2004/008842 US2004008842W WO2004088856A3 WO 2004088856 A3 WO2004088856 A3 WO 2004088856A3 US 2004008842 W US2004008842 W US 2004008842W WO 2004088856 A3 WO2004088856 A3 WO 2004088856A3
Authority
WO
WIPO (PCT)
Prior art keywords
walsh
hadamard
fht
engine
add
Prior art date
Application number
PCT/US2004/008842
Other languages
French (fr)
Other versions
WO2004088856A2 (en
Inventor
Veerendra Bhora
Pulakesh Roy
Tibor Boros
Original Assignee
Arraycomm Inc
Veerendra Bhora
Pulakesh Roy
Tibor Boros
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arraycomm Inc, Veerendra Bhora, Pulakesh Roy, Tibor Boros filed Critical Arraycomm Inc
Publication of WO2004088856A2 publication Critical patent/WO2004088856A2/en
Publication of WO2004088856A3 publication Critical patent/WO2004088856A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type
    • H04B2001/70935—Matched filter type using a bank of matched fileters, e.g. Fast Hadamard Transform

Abstract

In one embodiment, a Walsh-Hadamard decoder can have a hardware efficient Fast Hadamard Transform ('FHT') engine. In one embodiment, the FHT engine can include an input to receive an input sequence to be decoded into a Walsh-Hadamard codeword. The FHT engine can further include a controller to correlate the received input sequence with a plurality of Walsh- Hadamard codewords using two, add/subtract modules. In one embodiment, the two add/subtract modules operate in parallel.
PCT/US2004/008842 2003-03-27 2004-03-22 Walsh-hadamard decoder WO2004088856A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/402,039 2003-03-27
US10/402,039 US6996163B2 (en) 2003-03-27 2003-03-27 Walsh-Hadamard decoder

Publications (2)

Publication Number Publication Date
WO2004088856A2 WO2004088856A2 (en) 2004-10-14
WO2004088856A3 true WO2004088856A3 (en) 2005-01-27

Family

ID=32989587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/008842 WO2004088856A2 (en) 2003-03-27 2004-03-22 Walsh-hadamard decoder

Country Status (2)

Country Link
US (1) US6996163B2 (en)
WO (1) WO2004088856A2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8363744B2 (en) 2001-06-10 2013-01-29 Aloft Media, Llc Method and system for robust, secure, and high-efficiency voice and packet transmission over ad-hoc, mesh, and MIMO communication networks
US8130820B2 (en) 2005-03-01 2012-03-06 Qualcomm Incorporated Method and apparatus for interference cancellation in a wireless communications system
US7864832B2 (en) * 2005-05-06 2011-01-04 Samsung Electronics Co., Ltd. Multi-code correlation architecture for use in software-defined radio systems
US20080109507A1 (en) * 2006-10-23 2008-05-08 L3 Communications Integrated Systems, L.P. System and method for performing an optimized discrete walsh transform
US20080288568A1 (en) * 2007-05-14 2008-11-20 Hou Hsieh S Low power Fast Hadamard transform
US8842665B2 (en) * 2012-08-17 2014-09-23 Lsi Corporation Mixed radix fast hadamard transform for communication systems
CN104468022B (en) * 2013-09-18 2019-01-25 中兴通讯股份有限公司 A kind of interpretation method and device of transformat combination
RU2660629C1 (en) * 2017-06-22 2018-07-06 Закрытое акционерное общество Научно-технический центр "Модуль" Method of quick decoding of signal information elements
US10553285B2 (en) * 2017-11-28 2020-02-04 Western Digital Technologies, Inc. Single-port memory with opportunistic writes
EA033569B1 (en) * 2017-12-08 2019-11-06 Belarusian National Technical Univ Method of digital data transfer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6311202B1 (en) * 1999-03-12 2001-10-30 Lucent Technologies Inc. Hardware efficient fast hadamard transform engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5737925A (en) * 1980-08-14 1982-03-02 Matsushita Electric Ind Co Ltd High-speed hadamard converter
DE3482627D1 (en) * 1983-04-11 1990-08-09 Nec Corp ORTHOGONAL TRANSFORMATION AND DEVICE FOR IMPLEMENTING IT.
US5561618A (en) * 1993-12-22 1996-10-01 Qualcomm Incorporated Method and apparatus for performing a fast Hadamard transform
US5574675A (en) * 1994-03-22 1996-11-12 Industrial Technology Research Laboratories State-controlled half-parallel array walsh transform
KR970011794B1 (en) * 1994-11-23 1997-07-16 한국전자통신연구원 Hadamard transformer using memory cell
US5856935A (en) * 1996-05-08 1999-01-05 Motorola, Inc. Fast hadamard transform within a code division, multiple access communication system
US6028889A (en) * 1998-02-25 2000-02-22 Lucent Technologies, Inc. Pipelined fast hadamard transform
JP3716695B2 (en) * 1999-12-24 2005-11-16 日本電気株式会社 Fast Hadamard transformer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6311202B1 (en) * 1999-03-12 2001-10-30 Lucent Technologies Inc. Hardware efficient fast hadamard transform engine

Also Published As

Publication number Publication date
US20040190604A1 (en) 2004-09-30
US6996163B2 (en) 2006-02-07
WO2004088856A2 (en) 2004-10-14

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