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NL193712B - Modem for converting a digital input signal into a phase shift modulated output signal by means of differential phase shift modulation. - Google Patents

Modem for converting a digital input signal into a phase shift modulated output signal by means of differential phase shift modulation.

Info

Publication number
NL193712B
NL193712B NL9002797A NL9002797A NL193712B NL 193712 B NL193712 B NL 193712B NL 9002797 A NL9002797 A NL 9002797A NL 9002797 A NL9002797 A NL 9002797A NL 193712 B NL193712 B NL 193712B
Authority
NL
Netherlands
Prior art keywords
phase shift
modem
converting
digital input
modulated output
Prior art date
Application number
NL9002797A
Other languages
Dutch (nl)
Other versions
NL9002797A (en
NL193712C (en
Original Assignee
Interdigital Tech Corp
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 US06/893,916 external-priority patent/US4825448A/en
Application filed by Interdigital Tech Corp filed Critical Interdigital Tech Corp
Priority to NL9002797A priority Critical patent/NL193712C/en
Publication of NL9002797A publication Critical patent/NL9002797A/en
Publication of NL193712B publication Critical patent/NL193712B/en
Application granted granted Critical
Publication of NL193712C publication Critical patent/NL193712C/en

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
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/0264—Filter sets with mutual related characteristics
    • H03H17/0273—Polyphase filters
    • H03H17/0275—Polyphase filters comprising non-recursive filters
    • H03H17/0276—Polyphase filters comprising non-recursive filters having two phases
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/006—Demodulation of angle-, frequency- or phase- modulated oscillations by sampling the oscillations and further processing the samples, e.g. by computing techniques
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • 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
    • H03H17/0621—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H04M1/72502—Cordless telephones with one base station connected to a single line
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/005—Analog to digital conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0052—Digital to analog conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0054—Digital filters
    • H03D2200/0058—Digital filters using a digital filter with interpolation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/006—Signal sampling
    • H03D2200/0062—Computation of input samples, e.g. successive samples
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0082—Quadrature arrangements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2218/00—Indexing scheme relating to details of digital filters
    • H03H2218/04—In-phase and quadrature [I/Q] signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
NL9002797A 1986-08-07 1990-12-18 Modem for converting a digital input signal into a phase shift modulated output signal by means of differential phase shift modulation. NL193712C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL9002797A NL193712C (en) 1986-08-07 1990-12-18 Modem for converting a digital input signal into a phase shift modulated output signal by means of differential phase shift modulation.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US89391686 1986-08-07
US06/893,916 US4825448A (en) 1986-08-07 1986-08-07 Subscriber unit for wireless digital telephone system
NL8700645A NL192170C (en) 1986-08-07 1987-03-18 Subscriber unit for a wireless, phase-modulated time-division multiplex digital telephone system.
NL8700645 1987-03-18
NL9002797A NL193712C (en) 1986-08-07 1990-12-18 Modem for converting a digital input signal into a phase shift modulated output signal by means of differential phase shift modulation.
NL9002797 1990-12-18

Publications (3)

Publication Number Publication Date
NL9002797A NL9002797A (en) 1991-04-02
NL193712B true NL193712B (en) 2000-03-01
NL193712C NL193712C (en) 2000-07-04

Family

ID=26646222

Family Applications (2)

Application Number Title Priority Date Filing Date
NL9002799A NL193577C (en) 1986-08-07 1990-12-18 Frequency synthesizer for a digital communication system.
NL9002797A NL193712C (en) 1986-08-07 1990-12-18 Modem for converting a digital input signal into a phase shift modulated output signal by means of differential phase shift modulation.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NL9002799A NL193577C (en) 1986-08-07 1990-12-18 Frequency synthesizer for a digital communication system.

Country Status (1)

Country Link
NL (2) NL193577C (en)

Also Published As

Publication number Publication date
NL9002797A (en) 1991-04-02
NL193577B (en) 1999-10-01
NL193577C (en) 2000-02-02
NL9002799A (en) 1991-04-02
NL193712C (en) 2000-07-04

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
DNT Communications of changes of names of applicants whose applications have been laid open to public inspection

Free format text: INTERDIGITAL COMMUNICATIONS CORPORATION

CNR Transfer of rights (patent application after its laying open for public inspection)

Free format text: INTERDIGITAL TECHNOLOGY CORPORATION

BC A request for examination has been filed
V4 Discontinued because of reaching the maximum lifetime of a patent

Effective date: 20070318