Invalidity dossier
US 5982327
Adaptive array method, device, base station and subscriber unit
Current assignee: Google Technology Holdings LLC
Added 9/21/2026, 10:41:27 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 5,982,327
Title: Adaptive array method, device, base station and subscriber unit
Source: https://patents.google.com/patent/US5982327/en
Bibliographic data (per source): Application US09/005,998; filed 1998-01-12; granted/published 1999-11-09. Inventors Frederick Werner Vook and Kevin Lynn Baum; original assignee Motorola, Inc.; current assignee listed as Google Technology Holdings LLC. Legal status listed as "Expired – Lifetime," with anticipated expiration 2018-01-12. Classifications include H01Q3/2605 (adaptive arrays with feedback control over element weights) and H04B7/0851 (joint weighting using training sequences or error signal).
Purpose: The invention addresses interference suppression in an adaptive antenna array. Prior techniques compute array combining weights from known pilot symbols during a "training interval" and apply them during an "application interval," requiring the channel to stay relatively constant and consuming pilot symbols. The invention is directed to combining signals received from an antenna array so as to track channel variations while minimizing the percentage of the allocated time-frequency spectrum occupied by pilot sequences.
Plain-language scope (from the excerpt): The method and device combine antenna signals to suppress interference and improve signal quality measured by bit-error rate (BER) or signal-to-interference-plus-noise ratio (SINR), allowing data reception even with significant interference. It exploits received pilot symbols and permits interference suppression in portions of the spectrum where the transmitter sends no pilots, reducing required pilot overhead. A preferred embodiment operates in an OFDM (multicarrier) system, typically in a low-mobility, delay-spread channel where the channel varies slowly over time but significantly over frequency, such as wireless local loop or fixed access systems. The excerpt lists figures (1–11) covering a device, an antenna combiner and its controller, time-frequency slot structures, and flowcharts of method steps, but reproduces only the description narrative.
What the excerpt does not establish: It does not provide the full specification, the claims' exact language, the full drawings, detailed algorithms/weight equations, the omitted text after "fed into a...," or the specific content of figures 2–11. It also cannot confirm claim scope, enforceability, or (per instructions) litigation, ownership history, validity, or prior art.
Generated 10/1/2026, 10:01:18 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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