WO1998059471A3 - Method and apparatus for digital compensation of radio distortion in a wireless communication system - Google Patents

Method and apparatus for digital compensation of radio distortion in a wireless communication system Download PDF

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Publication number
WO1998059471A3
WO1998059471A3 PCT/US1998/012466 US9812466W WO9859471A3 WO 1998059471 A3 WO1998059471 A3 WO 1998059471A3 US 9812466 W US9812466 W US 9812466W WO 9859471 A3 WO9859471 A3 WO 9859471A3
Authority
WO
WIPO (PCT)
Prior art keywords
radio
wireless communication
communication system
distortion
signal
Prior art date
Application number
PCT/US1998/012466
Other languages
French (fr)
Other versions
WO1998059471A2 (en
Inventor
Qun Shen
Original Assignee
Ericsson Ge Mobile 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 Ge Mobile Inc filed Critical Ericsson Ge Mobile Inc
Priority to AU81448/98A priority Critical patent/AU8144898A/en
Publication of WO1998059471A2 publication Critical patent/WO1998059471A2/en
Publication of WO1998059471A3 publication Critical patent/WO1998059471A3/en

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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

Abstract

Radio distortion in a radio signal is compensated for in a digital modem in a wireless communication system. An actual frequency response of components in the wireless communication system contributing to distortion is determined. The inverse of the actual frequency response is multiplied with an ideal frequency response of the wireless communication system to produce a compensation frequency response. The compensation frequency response is applied to the radio signal to compensate for radio distortion. Alternately, an actual impulse response of components in the wireless communication system contributing to distortion is determined. The actual impulse response is convolved with an input reference signal to produce an actual output signal. The ideal impulse response is convolved with the same input reference signal to produce a desired output signal. The actual output signal is subtracted from the desired output signal to produce an error signal, and an adaptive algorithm is applied to the error signal to produce an adaptive compensation impulse response. When the adaptive compensation impulse response converges to an optimal solution, it is applied to the radio signal to compensate for radio distortion.
PCT/US1998/012466 1997-06-20 1998-06-19 Method and apparatus for digital compensation of radio distortion in a wireless communication system WO1998059471A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU81448/98A AU8144898A (en) 1997-06-20 1998-06-19 Method and apparatus for digital compensation of radio distortion in a wireless communication system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US87970197A 1997-06-20 1997-06-20
US08/879,701 1997-06-20

Publications (2)

Publication Number Publication Date
WO1998059471A2 WO1998059471A2 (en) 1998-12-30
WO1998059471A3 true WO1998059471A3 (en) 1999-04-01

Family

ID=25374706

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/012466 WO1998059471A2 (en) 1997-06-20 1998-06-19 Method and apparatus for digital compensation of radio distortion in a wireless communication system

Country Status (2)

Country Link
AU (1) AU8144898A (en)
WO (1) WO1998059471A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6920191B2 (en) 2001-02-02 2005-07-19 Telefonaktiebolaget Lm Ericsson (Publ) Estimation and compensation of the pulse-shape response in wireless terminals
US7103112B2 (en) * 2001-12-04 2006-09-05 Conexant, Inc. Transmit frequency domain equalizer
CN100514954C (en) * 2002-07-15 2009-07-15 诺基亚公司 Self-adaptive pre-equalizing method and apparatus
WO2009093094A1 (en) * 2008-01-24 2009-07-30 Agence Spatiale Europeenne A method for compensating signal distortion in an emitting payload

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238855A (en) * 1979-09-19 1980-12-09 Rca Corporation Parallel operation of multiple TV transmitters
US4494214A (en) * 1983-02-03 1985-01-15 Rca Corporation Apparatus for generating scaled weighting coefficients for sampled data filters
EP0518835A1 (en) * 1991-06-12 1992-12-16 Telefonaktiebolaget L M Ericsson Method of compensating the dependence of the useful transmitter signal on the transfer function of a combiner filter
US5489879A (en) * 1995-02-16 1996-02-06 Seiko Communication Systems, Inc. Amplitude and phase error normalization of subcarrier generator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238855A (en) * 1979-09-19 1980-12-09 Rca Corporation Parallel operation of multiple TV transmitters
US4494214A (en) * 1983-02-03 1985-01-15 Rca Corporation Apparatus for generating scaled weighting coefficients for sampled data filters
EP0518835A1 (en) * 1991-06-12 1992-12-16 Telefonaktiebolaget L M Ericsson Method of compensating the dependence of the useful transmitter signal on the transfer function of a combiner filter
US5489879A (en) * 1995-02-16 1996-02-06 Seiko Communication Systems, Inc. Amplitude and phase error normalization of subcarrier generator

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FORNEY JR G D ET AL: "COMBINED EQUALIZATION AND CODING USING PRECODING", IEEE COMMUNICATIONS MAGAZINE, vol. 29, no. 12, 1 December 1991 (1991-12-01), pages 25 - 34, XP000287979 *
M. G. BELLANGER: "ADAPTIVE DIGITAL FILTERS AND SIGNAL ANALYSIS", 1987, MARCEL DEKKER, INC., US, NEW YORK, XP002090179 *
SALEH A A M ET AL: "ADAPTIVE LINEARIZATION OF POWER AMPLIFIERS IN DIGITAL RADIO SYSTEMS", BELL SYSTEM TECHNICAL JOURNAL, vol. 62, no. 4, PART 01, April 1983 (1983-04-01), pages 1019 - 1033, XP002028354 *

Also Published As

Publication number Publication date
WO1998059471A2 (en) 1998-12-30
AU8144898A (en) 1999-01-04

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