[go: up one dir, main page]

WO2004034659A3 - Method and apparatus for digital modulation using a cordic algorithm - Google Patents

Method and apparatus for digital modulation using a cordic algorithm Download PDF

Info

Publication number
WO2004034659A3
WO2004034659A3 PCT/US2003/032024 US0332024W WO2004034659A3 WO 2004034659 A3 WO2004034659 A3 WO 2004034659A3 US 0332024 W US0332024 W US 0332024W WO 2004034659 A3 WO2004034659 A3 WO 2004034659A3
Authority
WO
WIPO (PCT)
Prior art keywords
cordic algorithm
electromagnetic wave
digital modulation
coordinate information
rectangular coordinate
Prior art date
Application number
PCT/US2003/032024
Other languages
French (fr)
Other versions
WO2004034659A2 (en
Inventor
Frank Liu
Original Assignee
Ma Com 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
Priority claimed from US10/624,312 external-priority patent/US7254186B2/en
Application filed by Ma Com Inc filed Critical Ma Com Inc
Priority to AU2003282536A priority Critical patent/AU2003282536A1/en
Publication of WO2004034659A2 publication Critical patent/WO2004034659A2/en
Publication of WO2004034659A3 publication Critical patent/WO2004034659A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/361—Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The invention is directed to a system for processing an electromagnetic wave by receiving rectangular coordinate information for the electromagnetic wave; and directly converting the rectangular coordinate information into a magnitude signal, a sin(ϕ), and a cos(ϕ) signal using a CORDIC algorithm, where ϕ represents a phase of the electromagnetic wave. The direct converting my be accomplished using shift and add/subtract operations in a processor and look-up table, or by using at least two cascaded processors employing the CORDIC algorithm.
PCT/US2003/032024 2002-10-08 2003-10-07 Method and apparatus for digital modulation using a cordic algorithm WO2004034659A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003282536A AU2003282536A1 (en) 2002-10-08 2003-10-07 Method and apparatus for digital modulation using a cordic algorithm

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US41689802P 2002-10-08 2002-10-08
US60/416,898 2002-10-08
US10/624,312 US7254186B2 (en) 2003-07-22 2003-07-22 Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
US10/624,312 2003-07-22

Publications (2)

Publication Number Publication Date
WO2004034659A2 WO2004034659A2 (en) 2004-04-22
WO2004034659A3 true WO2004034659A3 (en) 2004-06-03

Family

ID=32096171

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/032024 WO2004034659A2 (en) 2002-10-08 2003-10-07 Method and apparatus for digital modulation using a cordic algorithm

Country Status (2)

Country Link
AU (1) AU2003282536A1 (en)
WO (1) WO2004034659A2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411655B1 (en) * 1998-12-18 2002-06-25 Ericsson Inc. Systems and methods for converting a stream of complex numbers into an amplitude and phase-modulated radio power signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411655B1 (en) * 1998-12-18 2002-06-25 Ericsson Inc. Systems and methods for converting a stream of complex numbers into an amplitude and phase-modulated radio power signal

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
VANDERAAR M ET AL: "Transmit pulse shaping filters and CORDIC algorithm based precompensation for digital satellite communications", 1996 MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS. AMES, IOWA, AUG. 18 - 21, 1996, MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, NEW YORK, IEEE, US, vol. 3, 1996, pages 1219 - 1222, XP002159076, ISBN: 0-7803-3637-2 *
VOLDER J E: "THE CORDIC TRIGONOMETRIC COMPUTING TECHNIQUE", IRE TRANSACTIONS ON ELECTRONIC COMPUTERS, IEEE INC. NEW YORK, US, vol. EC-8, no. 3, September 1959 (1959-09-01), pages 330 - 334, XP000565555 *
WESTE N ET AL: "Broadband U-NII wireless data", VLSI DESIGN, 1998. PROCEEDINGS., 1998 ELEVENTH INTERNATIONAL CONFERENCE ON CHENNAI, INDIA 4-7 JAN. 1998, LOS ALAMITOS, CA, USA,IEEE COMPUT. SOC, US, 4 January 1998 (1998-01-04), pages 72 - 77, XP010263408, ISBN: 0-8186-8224-8 *

Also Published As

Publication number Publication date
AU2003282536A1 (en) 2004-05-04
WO2004034659A2 (en) 2004-04-22
AU2003282536A8 (en) 2004-05-04

Similar Documents

Publication Publication Date Title
AU2003239495A1 (en) Method and apparatus for a multiple modulation transmitter
ATE458225T1 (en) INFORMATION SIGNAL PROCESSING THROUGH MODIFICATION IN THE SPECTRAL/MODULATION SPECTRAL RANGE REPRESENTATION
AU2001270415A1 (en) High sensitivity reader for passive transponders
GB0423093D0 (en) Optical correlation apparatus and method
AU2001223770A1 (en) Method of clipping signal amplitudes in a modulation system
CN104702311A (en) Generating method, generating device, receiving method and receiving device of spread spectrum signal
WO2003024047A3 (en) Reception of a plurality of phase-modulated signals
TW200723670A (en) Polar modulation apparatus and method using FM modulation
WO2004082151A3 (en) Digital if processor
JP2005295378A (en) Ultrasonic digital communication device
WO2002084337A3 (en) Polarization to phase converter
TW345789B (en) Data synchronizer lock detector and method of operation thereof
SE9502065L (en) Ways to recover a frequency modulated signal
WO2004034659A3 (en) Method and apparatus for digital modulation using a cordic algorithm
FI956002A0 (en) Digital signal demodulation method and apparatus
TW200514393A (en) Error correction signal generating device and orthogonal modulator equipped with the error correction signal generating device
EP1217723A3 (en) Quadrature modulator using a Phase Locked Loop
MXPA04005117A (en) Sample rate converter system.
US6714651B2 (en) FM stereo signal demoudulating apparatus and method
JP2010011282A (en) Modulation apparatus, demodulation apparatus, information transfer system, modulation method and demodulation method
JP2016163219A (en) Communication device
Joshi et al. Design and implementation of BPSK Audio Transmitter & Receiver Using SDR
WO2006040453A3 (en) Demodulator and modulator/demodulator by direct frequency conversion
US11483025B2 (en) System and method for providing a unified global navigation satellite system (GNSS) receiver
JP5778879B1 (en) Communication device

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP