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US 7356090
Added 9/23/2026, 11:29:00 AM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 7,356,090 B2
Title: Transmission/reception apparatus for a wireless communication system with three transmission antennas
Assignee: Samsung Electronics Co., Ltd. (original assignee; current assignee listed as [Samsung Electronics Co Ltd](/litigations/by-plaintiff/Samsung%20Electronics%20Co%20Ltd))
Key dates (as listed; the source labels priority/filing dates as assumptions): Priority date 2003-01-02; filing date 2003-10-23; publication of US20040132413A1 on 2004-07-08; granted and published as US 7,356,090 B2 on 2008-04-08. Status: Expired – Lifetime, adjusted expiration 2025-09-22.
Inventors: Chan-soo Hwang, Seung-hoon Nam, Yung-soo Kim, Jae-Hak Chung. Application no.: US10/691,903.
Purpose: The invention addresses fading degradation in wireless communication using transmit antenna diversity. The excerpt states the object is "to provide a transmission/reception apparatus for securing a maximum diversity order and a maximum rate without a loss of a rate in a wireless communication system using 3 transmission antennas."
Plain-language scope: Two embodiments are described. In the first, a transmitter groups 4 input symbols into 4 combinations of three symbols each, delivering them over 4 time intervals via three antennas, with two or more symbols phase-rotated by predetermined phase values; a receiver uses a symbol arranger, channel estimator, two decoders finding minimum-metric symbol pairs, and a parallel-to-serial converter. In the second, 3 input symbols are grouped into 3 combinations of three symbols over 3 time intervals, again with phase rotation of two or more symbols; a receiver decodes with a single decoder over all possible three-symbol combinations. The first embodiment "is to optimize a diversity order and a rate"; the second "is to minimize transmission latency." Classification includes H04B7/06 and H04L1/0618 (space-time coding).
Not established by the excerpt: The full claim text, the complete encoding matrices, the specific predetermined phase values, the omitted portions of the description, and any findings about validity, infringement, ownership transfers, or litigation. The excerpt is partial and directs readers to the source.
Generated 10/1/2026, 9:53:56 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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