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System and method for acquiring a training matrix for a breamforming acquisition protocol using a butson matrix

System and method for acquiring a training matrix for a breamforming acquisition protocol using a butson matrix description/claims

This application claims the benefit under 35 U.S.C. 119(e) of U.S. Provisional Application No. 60/955,614, filed on Aug. 13, 2007, which is incorporated by reference in its entirety.

This application also relates to U.S. patent application Ser. No. 11/864,707, filed on Sep. 28, 2007, entitled “System and Method for Wireless Communication of Uncompressed High Definition Video Data Using a Beamforming Acquisition Protocol” and U.S. patent application Ser. No. 11/864,721, filed on Sep. 28, 2007, entitled “System and Method for Wireless Communication of Uncompressed High Definition Video Data Using a Transfer Matrix for Beamforming Estimation,” which are herein incorporated by reference in their entirety. This application also relates to U.S. patent application (Attorney Docket Number: SAMINF.125A) entitled “System and Method for Acquiring Beamforming Vectors Using Training Sequences with Adaptive Spreading Gains,” which is concurrently filed with this application and is incorporated herein by reference.

1. Field

The present invention relates to acquiring beamforming vectors, and in particular, to acquiring beamforming vectors for high-speed wireless data and video communications using antenna arrays at both transmitter and receiver.

2. Description of the Related Technology

With the proliferation of high quality video, an increasing number of electronic devices, such as consumer electronic devices, utilize high definition (HD) video which can require about 1 Gbps (gigabits per second) in bandwidth for transmission. As such, when transmitting such HD video between devices, conventional transmission approaches compress the HD video to a fraction of its size to lower the required transmission bandwidth. The compressed video is then decompressed for consumption. However, with each compression and subsequent decompression of the video data, some data can be lost and the picture quality can be reduced.

The High-Definition Multimedia Interface (HDMI) specification allows transfer of uncompressed HD signals between devices via a cable. While consumer electronics makers are beginning to offer HDMI-compatible equipment, there is not yet a suitable wireless (e.g., radio frequency) technology that is capable of transmitting uncompressed HD video signals. Wireless local area network (WLAN) and similar technologies can suffer interference issues when several devices, which do not have the bandwidth to carry the uncompressed HD signals, are connected together.

One aspect of the invention is a method of obtaining a training matrix for a beamforming acquisition protocol, the method comprising determining the number (N) of transmitter antennas, obtaining a unitary matrix having M rows and M columns, wherein M is an even number and is greater than N, and wherein the elements of the matrix comprise both real and imaginary components, selecting N rows of the unitary matrix and generating a training matrix having N rows and M columns based on the selected N rows.

Another aspect of the invention is a system for obtaining a training matrix for a beamforming acquisition protocol, the system comprising at least one transceiver, a memory, and a processor, being in data or signal communication with the at least one transceiver and the memory, configured to i) determine the number (N) of transmitter antennas, ii) obtain a unitary matrix having M rows and M columns, wherein M is an even number and is greater than or equal to N, and wherein the elements of the matrix comprise both real and imaginary components, iii) select N rows of the unitary matrix, and iv) generate a training matrix having N rows and M columns based on the selected N rows.

Another aspect of the invention is a method of obtaining a training matrix for a beamforming acquisition protocol, the method comprising determining the number (N) of transmitter antennas, obtaining a unitary matrix having M rows and M columns, wherein M is an greater than or equal to N, and wherein the elements of the matrix are selected from the group consisting of: +1, −1, +j, and −j, selecting N rows of the unitary matrix and generating a training matrix having N rows and M columns based on the selected N rows.

Another aspect of the invention is a system for obtaining a training matrix for a beamforming acquisition protocol, the system comprising at least one transceiver, a memory, and a processor, being in data or signal communication with the at least one transceiver and the memory, configured to i) determine the number (N) of transmitter antennas, ii) obtain a unitary matrix having M rows and M columns, wherein M is greater than or equal to N, and wherein the elements of the matrix are selected from the group consisting of: +1, −1, +j, and −j, iii) select N rows of the unitary matrix, and iv) generate a training matrix having N rows and M columns based on the selected N rows.

Yet another aspect of the invention is a system for obtaining a training matrix for a beamforming acquisition protocol, the system comprising means for determining the number (N) of transmitter antennas, means for obtaining a unitary matrix having M rows and M columns, wherein M is an greater than or equal to N, and wherein the elements of the matrix are selected from the group consisting of: +1, −1, +j, and −j, means for selecting N rows of the unitary matrix and means for generating a training matrix having N rows and M columns based on the selected N rows.

Yet another aspect of the invention is one or more processor-readable storage devices having processor-readable code, the processor-readable code for programming one or more processors to perform a method of obtaining a source beamforming vector for transmission of a data signal over a wireless communications channel, the method comprising determining the number (N) of transmitter antennas, obtaining a unitary matrix having M rows and M columns, wherein M is an greater than or equal to N, and wherein the elements of the matrix are selected from the group consisting of: +1, −1, +j, and −j, selecting N rows of the unitary matrix and generating a training matrix having N rows and M columns based on the selected N rows.

Still another aspect of the invention is a method of obtaining a training matrix for a beamforming acquisition protocol, the method comprising generating a training matrix based on at least a portion of a unitary matrix, wherein the elements of the unitary matrix are selected from the group consisting of: +1, −1, +j, and −j.

• Provisional Patent
• Utility Patent

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