GB2266646B - A finite impulse response (FIR) chip for use in a subscriber unit for a wireless digital telephone system - Google Patents

A finite impulse response (FIR) chip for use in a subscriber unit for a wireless digital telephone system

Info

Publication number
GB2266646B
GB2266646B GB9313280A GB9313280A GB2266646B GB 2266646 B GB2266646 B GB 2266646B GB 9313280 A GB9313280 A GB 9313280A GB 9313280 A GB9313280 A GB 9313280A GB 2266646 B GB2266646 B GB 2266646B
Authority
GB
United Kingdom
Prior art keywords
fir
chip
impulse response
telephone system
subscriber unit
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.)
Expired - Fee Related
Application number
GB9313280A
Other versions
GB9313280D0 (en
GB2266646A (en
Inventor
David Norton Critchlow
Moshe Yehushua
Graham Martin Avis
Wade Lyle Heimbigner
Karle Joseph Johnson
George Alan Wiley
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.)
InterDigital Technology Corp
Original Assignee
InterDigital Technology 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 US07/394,497 external-priority patent/US5008900A/en
Application filed by InterDigital Technology Corp filed Critical InterDigital Technology Corp
Publication of GB9313280D0 publication Critical patent/GB9313280D0/en
Priority to GB9322680A priority Critical patent/GB2270447B/en
Publication of GB2266646A publication Critical patent/GB2266646A/en
Application granted granted Critical
Publication of GB2266646B publication Critical patent/GB2266646B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2092—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner with digital generation of the modulated carrier (does not include the modulation of a digitally generated carrier)
    • 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
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B28/00—Generation of oscillations by methods not covered by groups H03B5/00 - H03B27/00, including modification of the waveform to produce sinusoidal oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • 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
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • 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
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03439—Fixed structures
    • H04L2025/03445—Time domain
    • H04L2025/03471—Tapped delay lines
    • H04L2025/03477—Tapped delay lines not time-recursive

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mobile Radio Communication Systems (AREA)
GB9313280A 1989-08-14 1993-06-25 A finite impulse response (FIR) chip for use in a subscriber unit for a wireless digital telephone system Expired - Fee Related GB2266646B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9322680A GB2270447B (en) 1989-08-14 1993-11-03 A subscriber unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/394,497 US5008900A (en) 1989-08-14 1989-08-14 Subscriber unit for wireless digital subscriber communication system
GB9016880A GB2235854B (en) 1989-08-14 1990-08-01 Subscriber unit for wireless digital subscriber communication system

Publications (3)

Publication Number Publication Date
GB9313280D0 GB9313280D0 (en) 1993-08-11
GB2266646A GB2266646A (en) 1993-11-03
GB2266646B true GB2266646B (en) 1994-06-29

Family

ID=26297421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9313280A Expired - Fee Related GB2266646B (en) 1989-08-14 1993-06-25 A finite impulse response (FIR) chip for use in a subscriber unit for a wireless digital telephone system

Country Status (1)

Country Link
GB (1) GB2266646B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311194B (en) * 1996-03-12 2000-05-31 Nokia Mobile Phones Ltd Transmitting and receiving radio signals
GB0010284D0 (en) * 2000-04-27 2000-06-14 Ifr Limited Signal generating methods and apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174274A (en) * 1985-03-20 1986-10-29 Int Mobile Machines Modem for telephone systems
GB2194711A (en) * 1986-08-07 1988-03-09 Int Mobile Machines Subscriber unit for a wireless digital telephone system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174274A (en) * 1985-03-20 1986-10-29 Int Mobile Machines Modem for telephone systems
GB2194711A (en) * 1986-08-07 1988-03-09 Int Mobile Machines Subscriber unit for a wireless digital telephone system

Also Published As

Publication number Publication date
GB9313280D0 (en) 1993-08-11
GB2266646A (en) 1993-11-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970801