CA2180924A1 - Diversity path co-channel interference reduction - Google Patents

Diversity path co-channel interference reduction

Info

Publication number
CA2180924A1
CA2180924A1 CA002180924A CA2180924A CA2180924A1 CA 2180924 A1 CA2180924 A1 CA 2180924A1 CA 002180924 A CA002180924 A CA 002180924A CA 2180924 A CA2180924 A CA 2180924A CA 2180924 A1 CA2180924 A1 CA 2180924A1
Authority
CA
Canada
Prior art keywords
symbols
window
weights
channel interference
time slot
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
CA002180924A
Other languages
French (fr)
Other versions
CA2180924C (en
Inventor
Adnan Abu-Dayya
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA002180924A priority Critical patent/CA2180924C/en
Priority to US08/730,828 priority patent/US5838742A/en
Priority to PCT/CA1996/000849 priority patent/WO1998001963A1/en
Publication of CA2180924A1 publication Critical patent/CA2180924A1/en
Application granted granted Critical
Publication of CA2180924C publication Critical patent/CA2180924C/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
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0851—Joint weighting using training sequences or error signal

Abstract

Diversity path signals, each comprising time division multiplexed symbols in a time slot including known symbols, are combined with respective weights to reduce co-channel interference. Initial weights are determined, using a window on the known symbols, to optimize signal to interference plus noise ratio. These weights are used to determine symbols adjacent the window, and the window is changed to include determined symbols and the weights redetermined. This process is repeated with the window being moved progressively, preferably with successive positions overlapping, throughout the time slot. The initially known symbols can comprise synchronization symbols and/or CDVCC (coded digital verification colour code) symbols. Desirably, both can be used with respective windows being moved in opposite directions through symbols between them to provide two results for each such symbol, the better one of which is selected in dependence upon a monitoring of possibly averaged errors for the symbols.
CA002180924A 1996-07-10 1996-07-10 Diversity path co-channel interference reduction Expired - Fee Related CA2180924C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002180924A CA2180924C (en) 1996-07-10 1996-07-10 Diversity path co-channel interference reduction
US08/730,828 US5838742A (en) 1996-07-10 1996-10-17 Diversity path co-channel interference reduction
PCT/CA1996/000849 WO1998001963A1 (en) 1996-07-10 1996-12-18 Diversity path co-channel interference reduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002180924A CA2180924C (en) 1996-07-10 1996-07-10 Diversity path co-channel interference reduction

Publications (2)

Publication Number Publication Date
CA2180924A1 true CA2180924A1 (en) 1998-01-11
CA2180924C CA2180924C (en) 2003-04-08

Family

ID=4158584

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002180924A Expired - Fee Related CA2180924C (en) 1996-07-10 1996-07-10 Diversity path co-channel interference reduction

Country Status (3)

Country Link
US (1) US5838742A (en)
CA (1) CA2180924C (en)
WO (1) WO1998001963A1 (en)

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US9742611B2 (en) 2013-10-23 2017-08-22 Silicon Laboratories Inc. Synchronizing orthogonal frequency division multiplexed (OFDM) symbols in a receiver
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Also Published As

Publication number Publication date
WO1998001963A1 (en) 1998-01-15
US5838742A (en) 1998-11-17
CA2180924C (en) 2003-04-08

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