AU7708400A - A simplified digital fir filter for direct sequence spread spectrum communication systems - Google Patents

A simplified digital fir filter for direct sequence spread spectrum communication systems

Info

Publication number
AU7708400A
AU7708400A AU77084/00A AU7708400A AU7708400A AU 7708400 A AU7708400 A AU 7708400A AU 77084/00 A AU77084/00 A AU 77084/00A AU 7708400 A AU7708400 A AU 7708400A AU 7708400 A AU7708400 A AU 7708400A
Authority
AU
Australia
Prior art keywords
spread spectrum
communication systems
fir filter
spectrum communication
direct sequence
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
AU77084/00A
Inventor
David Barrow
Paul W. Dent
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ericsson Inc
Original Assignee
Ericsson Inc
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 Ericsson Inc filed Critical Ericsson Inc
Publication of AU7708400A publication Critical patent/AU7708400A/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • H03H17/0607—Non-recursive filters comprising a ROM addressed by the input data signals

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A spread spectrum modulated signal generator is disclosed that reduces the storage requirement for storing values representing filter responses of input signal samples in a digital filter by taking advantage of time-reversal symmetry of the responses. Moreover, the disclosed signal generator supports up-ramping and down-ramping for smooth transmission of spread spectrum modulated signals.
AU77084/00A 1999-10-04 2000-09-22 A simplified digital fir filter for direct sequence spread spectrum communication systems Abandoned AU7708400A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/411,309 US6570907B1 (en) 1999-10-04 1999-10-04 Simplified finite impulse response (FIR) digital filter for direct sequencespread spectrum communication
US09411309 1999-10-04
PCT/US2000/025970 WO2001026224A1 (en) 1999-10-04 2000-09-22 A simplified digital fir filter for direct sequence spread spectrum communication systems

Publications (1)

Publication Number Publication Date
AU7708400A true AU7708400A (en) 2001-05-10

Family

ID=23628421

Family Applications (1)

Application Number Title Priority Date Filing Date
AU77084/00A Abandoned AU7708400A (en) 1999-10-04 2000-09-22 A simplified digital fir filter for direct sequence spread spectrum communication systems

Country Status (8)

Country Link
US (1) US6570907B1 (en)
EP (1) EP1221198B1 (en)
JP (1) JP2003513488A (en)
CN (1) CN1211926C (en)
AT (1) ATE322762T1 (en)
AU (1) AU7708400A (en)
DE (1) DE60027183D1 (en)
WO (1) WO2001026224A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7245651B1 (en) * 1999-12-20 2007-07-17 Intel Corporation Dual mode filter for mobile telecommunications
ATE266287T1 (en) * 2000-12-20 2004-05-15 Motorola Inc SQUARE MODULATOR WITH PROGRAMMABLE PULSE SHAPING
US7986932B1 (en) * 2002-11-19 2011-07-26 National Semiconductor Corporation Fixed point FIR filter with adaptive truncation and clipping and wireless mobile station using same
ATE376281T1 (en) * 2003-04-29 2007-11-15 Nxp Bv DIGITAL FILTER ARRANGEMENT
US8165214B2 (en) * 2007-05-08 2012-04-24 Freescale Semiconductor, Inc. Circuit and method for generating fixed point vector dot product and matrix vector values
CN101242168B (en) * 2008-03-06 2010-06-02 清华大学 A direct implementation method and implementation device of a FIR digital filter
TW201026009A (en) * 2008-12-30 2010-07-01 Ind Tech Res Inst An electrical apparatus, circuit for receiving audio and method for filtering noise
CN102082559B (en) * 2010-12-02 2013-08-21 广东宝莱特医用科技股份有限公司 Method for realizing linear phase IIR (infinite impulse response) filter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825448A (en) 1986-08-07 1989-04-25 International Mobile Machines Corporation Subscriber unit for wireless digital telephone system
US5530722A (en) 1992-10-27 1996-06-25 Ericsson Ge Mobile Communications Inc. Quadrature modulator with integrated distributed RC filters
US5500811A (en) 1995-01-23 1996-03-19 Microunity Systems Engineering, Inc. Finite impulse response filter
US5870431A (en) 1996-06-27 1999-02-09 Qualcomm Incorporated ROM-based finite impulse response filter for use in mobile telephone
US5838725A (en) 1996-12-06 1998-11-17 U.S. Philips Corporation Floating point digital transversal filter
US6456644B1 (en) * 1997-06-23 2002-09-24 Cellnet Data Systems, Inc. Bandpass correlation of a spread spectrum signal

Also Published As

Publication number Publication date
CN1211926C (en) 2005-07-20
EP1221198B1 (en) 2006-04-05
EP1221198A1 (en) 2002-07-10
DE60027183D1 (en) 2006-05-18
US6570907B1 (en) 2003-05-27
JP2003513488A (en) 2003-04-08
ATE322762T1 (en) 2006-04-15
CN1408143A (en) 2003-04-02
WO2001026224A9 (en) 2003-01-23
WO2001026224A1 (en) 2001-04-12

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase