Patent 7738595

Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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To identify the most relevant prior art for US patent 7738595, I will examine the "Cited By" and "Citations" sections of the patent itself, as listed in the provided full patent text. The USPTO's Patent Public Search tool can be used for direct searches of patent numbers. I will then analyze each cited patent against the independent claims of US7738595 to determine potential anticipation under 35 U.S.C. § 102.

Based on the provided patent text, here are some of the cited prior art patents:

Cited Patents (Examiner Citations):

  • US6091361A

    • Full Citation: US6091361A, "Method and apparatus for joint space-time array signal processing", Davis; Dennis W., Issued: 2000-07-18, Filed: 1998-05-12.
    • Brief Description: This patent describes a method and apparatus for joint space-time array signal processing. It focuses on combining spatial and temporal processing to improve signal reception in wireless communication systems.
    • Potential Anticipation: This patent generally relates to multi-antenna systems and signal processing. While it addresses space-time processing for improved signal quality, it doesn't explicitly detail the "unit magnitude decomposition" with eigenvalues on a unit circle (Claims 1, 3, 9) or the specific R⁻¹V / V⁻¹ weighting schemes (Claims 5, 7, 11) as defined in the independent claims of US7738595. Further analysis would be needed to determine if the underlying mathematical principles or an equivalent are present.

  • US6307882B1

    • Full Citation: US6307882B1, "Determining channel characteristics in a space-time architecture wireless communication system having multi-element antennas", Lucent Technologies Inc., Issued: 2001-10-23, Filed: 1998-07-10.
    • Brief Description: This patent describes methods for determining channel characteristics in wireless communication systems with multi-element antennas, which is crucial for effective MIMO operation.
    • Potential Anticipation: This patent focuses on channel estimation, which is a prerequisite for applying the weighting methods of US7738595. It doesn't appear to directly disclose the specific decomposition methods or weighting vectors claimed in US7738595 (Claims 1, 3, 5, 7, 9, 11).

  • US20020118781A1

    • Full Citation: US20020118781A1, "Method and device for multiple input/multiple output transmit and receive weights for equal-rate data streams", Thomas Timothy A., Publication date: 2002-08-29, Filing date: 2000-12-29.
    • Brief Description: This patent application describes a method and device for determining transmit and receive weights in MIMO systems to achieve equal-rate data streams. This aligns with the objective of US7738595 to equalize signal strengths.
    • Potential Anticipation: This reference is highly relevant as it explicitly discusses transmit and receive weights for equal-rate data streams in MIMO. It would require a detailed comparison to ascertain if its methods for deriving these weights (e.g., the specific mathematical decompositions) fully anticipate the "unit magnitude decomposition" (Claims 1, 3, 9) or the R⁻¹V / V⁻¹ weighting (Claims 5, 7, 11) of US7738595.

  • US6446025B1

    • Full Citation: US6446025B1, "Multiple propagation wave parameter measuring method and apparatus and machine-readable recording medium recording multiple propagation wave parameter measuring program", Nec Corporation, Issued: 2002-09-03, Filed: 1998-03-26.
    • Brief Description: This patent concerns measuring multiple propagation wave parameters, which is fundamental to understanding and characterizing wireless channels for MIMO.
    • Potential Anticipation: Similar to US6307882B1, this patent provides foundational technology for channel characterization rather than the specific weighting and decomposition methods claimed in US7738595.

  • US20020126045A1

    • Full Citation: US20020126045A1, "Radio-wave arrival-direction estimating apparatus and directional variable transceiver", Takaaki Kishigami, Publication date: 2002-09-12, Filing date: 2000-12-12.
    • Brief Description: This patent application relates to estimating the arrival direction of radio waves and directional transceivers, which can be used in multi-antenna systems for beamforming.
    • Potential Anticipation: While relevant to antenna array manipulation, this reference does not appear to directly anticipate the specific decomposition techniques (Unit Magnitude Decomposition or Successive Decomposition with SVD) and weighting vector forms (R⁻¹V, V⁻¹) central to the independent claims of US7738595.

  • US20030203743A1

    • Full Citation: US20030203743A1, "Multiple-Input Multiple-Output Radio Transceiver", Cognio, Inc., Publication date: 2003-10-30, Filing date: 2002-04-22.
    • Brief Description: This patent application describes a MIMO radio transceiver. The abstract mentions beamforming for multiple-input multiple-output systems.
    • Potential Anticipation: This patent is broadly related to MIMO transceivers and beamforming. A detailed examination of its method for determining beamforming weights would be necessary to assess potential anticipation of the specific decomposition techniques of US7738595.

  • US20040023621A1

    • Full Citation: US20040023621A1, "System and method for multiple-input multiple-output (MIMO) radio communication", Sugar Gary L., Publication date: 2004-02-05, Filing date: 2002-07-30.
    • Brief Description: This patent application describes a MIMO radio communication system and method. The abstract discusses processing signals for transmission and reception in a MIMO environment.
    • Potential Anticipation: This reference is relevant as a general MIMO system. A deeper dive into its specific signal processing and weighting algorithms would be needed to determine if it anticipates the unique decomposition methods of US7738595.

  • US20040165676A1

    • Full Citation: US20040165676A1, "Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation", Ranganathan Krishnan, Publication date: 2004-08-26, Filing date: 2003-02-25.
    • Brief Description: This patent application focuses on transmission schemes for multi-antenna systems using multi-carrier modulation (e.g., OFDM), which is also mentioned in US7738595 as a context for its application.
    • Potential Anticipation: This patent addresses multi-antenna systems and OFDM. While the context is similar, the specific "unit magnitude decomposition" or "Successive Decomposition with a Final SVD" and the resulting weighting vectors (R⁻¹V, V⁻¹) are the distinctive features of US7738595, which would need to be compared against the teaching of this prior art.

  • US6859503B2

    • Full Citation: US6859503B2, "Method and system in a transceiver for controlling a multiple-input, multiple-output communications channel", Motorola, Inc., Issued: 2005-02-22, Filed: 2001-04-07.
    • Brief Description: This patent describes a method and system in a transceiver for controlling a MIMO communications channel. The focus is on adapting to channel conditions.
    • Potential Anticipation: This is a broad MIMO control patent. Its methods for controlling the channel would need to be scrutinized for any overlap with the specific mathematical decompositions and weighting strategies claimed in US7738595 (Claims 1, 3, 5, 7, 9, 11).

  • US20040190636A1

    • Full Citation: US20040190636A1, "System and method for wireless communication systems", Oprea Alexandru M., Publication date: 2004-09-30, Filing date: 2003-03-31.
    • Brief Description: This patent application describes a system and method for wireless communication, specifically mentioning MIMO.
    • Potential Anticipation: This is another general MIMO system reference. A detailed analysis would be required to see if its described weighting methods implicitly or explicitly teach the specific decomposition and vector forms of US7738595.

  • US20040209579A1

    • Full Citation: US20040209579A1, "System and method for transmit weight computation for vector beamforming radio communication", Chandra Vaidyanathan, Publication date: 2004-10-21, Filing date: 2003-04-10.
    • Brief Description: This patent application focuses on computing transmit weights for vector beamforming in radio communication. This is directly relevant to the weighting aspects of US7738595.
    • Potential Anticipation: This reference is highly relevant due to its focus on transmit weight computation for beamforming. A thorough comparison of the specific algorithms and mathematical operations used to compute these weights would be crucial to determine if it anticipates the "unit magnitude decomposition" or the R⁻¹V / V⁻¹ weighting in Claims 1, 3, 5, 7, 9, 11 of US7738595.

  • US20050101259A1

    • Full Citation: US20050101259A1, "Communication channel optimization systems and methods in multi-user communication systems", Wen Tong, Publication date: 2005-05-12, Filing date: 2003-11-06.
    • Brief Description: This patent application describes optimization systems and methods for communication channels in multi-user communication systems, including MIMO.
    • Potential Anticipation: While generally related to channel optimization in MIMO, a close examination of the specific optimization algorithms for transmit and receive weights would be required to determine if they anticipate the unique decomposition methods of US7738595.

  • US20050152484A1

    • Full Citation: US20050152484A1, "Multicarrier receivers and methods for separating transmitted signals in a multiple antenna system", Intel Corporation, Publication date: 2005-07-14, Filing date: 2004-01-12.
    • Brief Description: This patent application describes multicarrier receivers and methods for separating transmitted signals in multiple antenna systems, relevant to the receiver functionality in US7738595.
    • Potential Anticipation: This reference focuses on separating signals at the receiver in multi-antenna systems. The methods used for separation would need to be compared against the receive weighting (Uᵢ, V⁻¹) of US7738595 to determine if the specific decomposition is anticipated.

  • US20050238111A1

    • Full Citation: US20050238111A1, "Spatial processing with steering matrices for pseudo-random transmit steering in a multi-antenna communication system", Wallace Mark S, Publication date: 2005-10-27, Filing date: 2004-04-09.
    • Brief Description: This patent application relates to spatial processing with steering matrices for multi-antenna communication systems. Steering matrices are analogous to weighting vectors.
    • Potential Anticipation: This patent's focus on spatial processing and steering matrices makes it potentially relevant. A detailed comparison of how these steering matrices are derived and their mathematical properties would be necessary to assess anticipation of the Unit Magnitude Decomposition or the R⁻¹V / V⁻¹ weighting of US7738595.

  • US7203249B2

    • Full Citation: US7203249B2, "Spatio-temporal processing for communication", Cisco Technology, Inc., Issued: 2007-04-10, Filed: 1996-08-29.
    • Brief Description: This patent describes spatio-temporal processing for communication, which involves both spatial and temporal aspects of signal processing in multi-antenna systems.
    • Potential Anticipation: While broadly related to multi-antenna signal processing, the specific mathematical decompositions and weighting vectors defined in the independent claims of US7738595 (Claims 1, 3, 5, 7, 9, 11) would need to be explicitly or inherently present in this prior art for anticipation.

  • US7263132B2

    • Full Citation: US7263132B2, "Adaptive space-time transmit diversity coding for MIMO systems", Mitsubishi Electric Research Laboratories, Inc., Issued: 2007-08-28, Filed: 2002-08-13.
    • Brief Description: This patent describes adaptive space-time transmit diversity coding specifically for MIMO systems.
    • Potential Anticipation: This patent is directly related to MIMO and transmit diversity. A close examination of its coding and weighting schemes would be required to determine if it anticipates the unique decomposition methods for achieving specific eigenvalue properties (e.g., on the unit circle) or the R⁻¹V / V⁻¹ weighting of US7738595.

  • US20080170533A1

    • Full Citation: US20080170533A1, "Near-field spatial multiplexing", Haruch Cyzs, Publication date: 2008-07-17, Filing date: 2002-02-13.
    • Brief Description: This patent application describes near-field spatial multiplexing, a technique for transmitting multiple data streams.
    • Potential Anticipation: This patent explores a specific type of spatial multiplexing. While related to transmitting multiple streams, a detailed comparison would be needed to determine if the specific mathematical processes for generating transmit and receive weights, as claimed in US7738595, are disclosed.

General Note on Anticipation (35 U.S.C. § 102):
For a prior art reference to anticipate a claim under 35 U.S.C. § 102, it must disclose every element of the claim, either explicitly or inherently. Since US7738595 focuses on specific mathematical decompositions and resulting properties of weighting vectors (e.g., eigenvalues on a unit circle, orthogonal eigenvectors, specific forms like R⁻¹V and V⁻¹), a thorough anticipation analysis would require a detailed comparison of the mathematical underpinnings and explicit disclosures of each cited prior art reference against the independent claims of US7738595. Many of the listed citations provide context or related concepts but do not immediately appear to fully disclose the specific mathematical weighting methodologies of the independent claims. Further in-depth analysis of each cited patent's mathematical methods would be necessary for a definitive determination of anticipation.

Generated 5/25/2026, 6:48:32 PM