CA2186688A1 - Transmitter antenna diversity and fading-resistant modulation for wireless communication systems - Google Patents

Transmitter antenna diversity and fading-resistant modulation for wireless communication systems

Info

Publication number
CA2186688A1
CA2186688A1 CA002186688A CA2186688A CA2186688A1 CA 2186688 A1 CA2186688 A1 CA 2186688A1 CA 002186688 A CA002186688 A CA 002186688A CA 2186688 A CA2186688 A CA 2186688A CA 2186688 A1 CA2186688 A1 CA 2186688A1
Authority
CA
Canada
Prior art keywords
fading
scheme
resistant
carrier
bpsk
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.)
Granted
Application number
CA002186688A
Other languages
French (fr)
Other versions
CA2186688C (en
Inventor
Elvino S. Sousa
Victor M. Dasilva
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.)
ELVINO S SOUSA
VICTOR DASILVA
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA002186688A priority Critical patent/CA2186688C/en
Publication of CA2186688A1 publication Critical patent/CA2186688A1/en
Application granted granted Critical
Publication of CA2186688C publication Critical patent/CA2186688C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

The present invention provides a bandwidth-efficient fading-resistant transmission scheme where a base station implements transmitter diversity using L
antennas or L carrier frequencies or L time slots, regardless of the use of frame oriented power control. When the antennas or carriers are spaced sufficiently far apart, or when a different power is used for each power control frame, the transmission from each antenna or carrier or time frame undergoes independent fading. These transmissions are coordinated to mitigate the effects of Rayleigh fading and the mobile receiver can recover the entire L-dimensional transmitted vector as long as the signal energy of at least one coordinate is large enough. L-dimensional fading-resistant signal constellations are generated by maximizing a figure of merit for the Rayleigh fading channel. This scheme offers a significant performance improvement over a conventional single-antenna or single-carrier narrowband BPSK scheme when coding is ineffective due to slow fading. When there is background white Gaussian noise, the fading-resistant scheme has a significant energy savings advantage over an uncoded BPSK scheme, for a given bit error rate. In the forward link of a cellular network, where cochannel interference is the dominant source of noise, the fading-resistant scheme results in a significant capacity increase over uncoded BPSK, for a given bit error rate.
Both coherent and differentially coherent systems are disclosed.
CA002186688A 1996-09-27 1996-09-27 Transmitter antenna diversity and fading-resistant modulation for wireless communication systems Expired - Fee Related CA2186688C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002186688A CA2186688C (en) 1996-09-27 1996-09-27 Transmitter antenna diversity and fading-resistant modulation for wireless communication systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002186688A CA2186688C (en) 1996-09-27 1996-09-27 Transmitter antenna diversity and fading-resistant modulation for wireless communication systems

Publications (2)

Publication Number Publication Date
CA2186688A1 true CA2186688A1 (en) 1998-03-28
CA2186688C CA2186688C (en) 2005-08-30

Family

ID=4158983

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002186688A Expired - Fee Related CA2186688C (en) 1996-09-27 1996-09-27 Transmitter antenna diversity and fading-resistant modulation for wireless communication systems

Country Status (1)

Country Link
CA (1) CA2186688C (en)

Also Published As

Publication number Publication date
CA2186688C (en) 2005-08-30

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Legal Events

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EEER Examination request
MKLA Lapsed

Effective date: 20150928