CA2536410A1 - Transmitter diversity technique for wireless communications - Google Patents

Transmitter diversity technique for wireless communications Download PDF

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Publication number
CA2536410A1
CA2536410A1 CA002536410A CA2536410A CA2536410A1 CA 2536410 A1 CA2536410 A1 CA 2536410A1 CA 002536410 A CA002536410 A CA 002536410A CA 2536410 A CA2536410 A CA 2536410A CA 2536410 A1 CA2536410 A1 CA 2536410A1
Authority
CA
Canada
Prior art keywords
diversity
antennas
transmit
effected
redundantly transmitting
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
CA002536410A
Other languages
French (fr)
Other versions
CA2536410C (en
Inventor
Vahid Tarokh
Siavash Alamouti
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.)
AT&T Mobility II LLC
Original Assignee
At&T Wireless Services, Inc.
Vahid Tarokh
Siavash Alamouti
New Cingular Wireless Services, Inc.
Cingular Wireless Ii, Inc.
Cingular Wireless Ii, Llc
At&T Mobility Ii, Llc
At&T Mobility Ii Llc
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 At&T Wireless Services, Inc., Vahid Tarokh, Siavash Alamouti, New Cingular Wireless Services, Inc., Cingular Wireless Ii, Inc., Cingular Wireless Ii, Llc, At&T Mobility Ii, Llc, At&T Mobility Ii Llc filed Critical At&T Wireless Services, Inc.
Priority claimed from CA002405875A external-priority patent/CA2405875C/en
Publication of CA2536410A1 publication Critical patent/CA2536410A1/en
Application granted granted Critical
Publication of CA2536410C publication Critical patent/CA2536410C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only simple arithmetic operations, such as negation and conjugation. The diversity created by the transmitter utilizes apace diversity and either time or frequency diversity. Space diversity is effected by redundantly transmitting over a plurality of antennas, time diversity is effected by redundantly transmitting at different times, and frequency diversity is effected by redundantly transmitting at different frequencies. Illustratively, using two transmit antennas and a single receive antenna, one of the disclosed embodiments provides the same diversity gain as the maximal-ratio receiver combining (MRRC) scheme with one transmit antenna and two receive antennas. The principles of this invention are applicable to arrangements with more than two antennas, and an illustrative embodiment is disclosed using the same apace block code with two transmit and two receive antennas.
CA002536410A 1997-09-16 1998-08-31 Transmitter diversity technique for wireless communications Expired - Lifetime CA2536410C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US5901697P 1997-09-16 1997-09-16
US60/059,016 1997-09-16
US5921997P 1997-09-18 1997-09-18
US60/059,219 1997-09-18
US6378097P 1997-10-31 1997-10-31
US60/063,780 1997-10-31
CA002405875A CA2405875C (en) 1997-09-16 1998-08-31 Transmitter diversity technique for wireless communications

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002405875A Division CA2405875C (en) 1997-09-16 1998-08-31 Transmitter diversity technique for wireless communications

Publications (2)

Publication Number Publication Date
CA2536410A1 true CA2536410A1 (en) 1999-03-25
CA2536410C CA2536410C (en) 2009-05-19

Family

ID=34397071

Family Applications (3)

Application Number Title Priority Date Filing Date
CA2495356A Expired - Lifetime CA2495356C (en) 1997-09-16 1998-08-31 Transmitter diversity technique for wireless communications
CA002536410A Expired - Lifetime CA2536410C (en) 1997-09-16 1998-08-31 Transmitter diversity technique for wireless communications
CA002509947A Abandoned CA2509947A1 (en) 1997-09-16 1998-08-31 Transmitter diversity technique for wireless communications

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA2495356A Expired - Lifetime CA2495356C (en) 1997-09-16 1998-08-31 Transmitter diversity technique for wireless communications

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002509947A Abandoned CA2509947A1 (en) 1997-09-16 1998-08-31 Transmitter diversity technique for wireless communications

Country Status (1)

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CA (3) CA2495356C (en)

Also Published As

Publication number Publication date
CA2509947A1 (en) 1999-03-25
CA2495356A1 (en) 1999-03-25
CA2536410C (en) 2009-05-19
CA2495356C (en) 2011-01-11

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Effective date: 20180831