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

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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

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 2003-07-22
US10/624,312 US7254186B2 (en) 2003-07-22 2003-07-22 Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture

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
AU2003282536A8 (en) 2004-05-04
AU2003282536A1 (en) 2004-05-04
WO2004034659A2 (en) 2004-04-22

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