Patents by Inventor Vikram Reddy Anreddy
Vikram Reddy Anreddy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8989817Abstract: Method and apparatus related to implementing and/or utilizing different polarization antennas with different corresponding average transmit power levels are described. Inter-cell interference is mitigated by having different cells with different power relationships between polarizations antennas. For example, a first base station transmits at a high average power level on its vertical polarization antenna and transmits at a low average power level on its horizontal polarization antenna. Concurrently, a second base station, which is adjacent to the first base station, transmits at a low average power level on its vertical polarization antenna and transmits at a high average power level on its horizontal polarization antenna. In some hexagonal deployment schemes a base station has at most two adjacent base stations using the same power level to antenna polarization direction relationship as it is using.Type: GrantFiled: March 6, 2008Date of Patent: March 24, 2015Assignee: QUALCOMM IncorporatedInventors: Xinzhou Wu, Vikram Reddy Anreddy, Junyi Li, Rajiv Laroia
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Patent number: 8755833Abstract: A MIMO wireless communications device supports a dual polarized mode of antenna operation and a single polarized mode of antenna operation. Antenna mode selection is performed as a function of signal to noise ration information and/or rank information corresponding to a communications channel matrix. One of a communications device's processing chains is switched between first and second polarization orientation antennas, e.g., vertical and horizontally polarized antennas, as a function of the antenna mode selection. In various embodiments, the dual polarized mode is advantageously used for high SNR users, while in the low SNR regime, where the capacity is limited by received power, the single polarized antenna configuration, sometimes referred to as the spatial MIMO configuration, is used.Type: GrantFiled: July 10, 2012Date of Patent: June 17, 2014Assignee: QUALCOMM IncorporatedInventors: Vikram Reddy Anreddy, Xinzhou Wu, Rajiv Laroia
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Patent number: 8594732Abstract: Methods and apparatus for using multiple antennas having different polarizations are described. Polarized antennas are advantageously deployed in a cellular network. Some of the sectors utilize an antenna with a first direction polarization, while other sectors use an antenna with a second direction polarization, for a given carrier. Various embodiments are directed to methods and apparatus related to base station deployment which set up and/or operate base stations in accordance with an advantageous reuse pattern from the perspective of inter-cell and/or inter-sector interference. In some embodiments a plurality of carriers are used in addition to a plurality of different polarization direction antennas. In some such embodiments, a base station is configured so that for a given sector different carriers are associated with different direction polarization antennas. Some embodiments are directed to multi-sector base station implementations.Type: GrantFiled: March 8, 2008Date of Patent: November 26, 2013Assignee: QUALCOMM IncorporatedInventors: Rajiv Laroia, Vikram Reddy Anreddy, Xinzhou Wu
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Patent number: 8594733Abstract: Methods and apparatus for using multiple antennas having different polarizations are described. Polarized antennas are advantageously deployed in a cellular network. Some of the cells utilize an antenna with a first direction polarization, while cells use an antenna with a second direction polarization, for a given carrier. Various embodiments are directed to methods and apparatus related to base station deployment which set up and/or operate base stations in accordance with an advantageous reuse pattern from the perspective of inter-cell interference. In some embodiments a plurality of carriers are used in addition to a plurality of different polarization direction antennas. In some such embodiments, a base station is configured so that for a given cell different carriers are associated with different direction polarization antennas. Some embodiments are directed to single sector base station implementations.Type: GrantFiled: March 8, 2008Date of Patent: November 26, 2013Assignee: QUALCOMM IncorporatedInventors: Rajiv Laroia, Vikram Reddy Anreddy, Xinzhou Wu
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Patent number: 8331946Abstract: Methods and apparatus which support the use of differently polarized antennas to schedule two or more users employing multiple antennas with different polarization, on the same communications segment, e.g. a time/frequency slab, in either the uplink or downlink are described. Various embodiments include an access node which classifies and schedules wireless terminals to segments as a function of suitability for single polarization direction communications. Some embodiments are directed to methods and apparatus for operating a communications device supporting the use of multiple antennas having different polarization, to implement a polarization based multiple access scheme. Unlike Spatial Division multiple access schemes, the users sharing a communications segment in the polarization based scheme need not be geographically well separated.Type: GrantFiled: March 6, 2008Date of Patent: December 11, 2012Assignee: QUALCOMM IncorporatedInventors: Vikram Reddy Anreddy, Saurabh Tavildar, Juergen Cezanne, Xinzhou Wu, Rajiv Laroia
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Patent number: 8306473Abstract: A MIMO wireless communications device supports a dual polarized mode of antenna operation and a single polarized mode of antenna operation. Antenna mode selection is performed as a function of signal to noise ratio information and/or rank information corresponding to a communications channel matrix. One of a communications device's processing chains is switched between first and second polarization orientation antennas, e.g., vertical and horizontally polarized antennas, as a function of the antenna mode selection. In various embodiments, the dual polarized mode is advantageously used for high SNR users, while in the low SNR regime, where the capacity is limited by received power, the single polarized antenna configuration, sometimes referred to as the spatial MIMO configuration, is used.Type: GrantFiled: February 15, 2008Date of Patent: November 6, 2012Assignee: QUALCOMM IncorporatedInventors: Vikram Reddy Anreddy, Xinzhou Wu, Rajiv Laroia
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Publication number: 20120275499Abstract: A MIMO wireless communications device supports a dual polarized mode of antenna operation and a single polarized mode of antenna operation. Antenna mode selection is performed as a function of signal to noise ration information and/or rank information corresponding to a communications channel matrix. One of a communications device's processing chains is switched between first and second polarization orientation antennas, e.g., vertical and horizontally polarized antennas, as a function of the antenna mode selection. In various embodiments, the dual polarized mode is advantageously used for high SNR users, while in the low SNR regime, where the capacity is limited by received power, the single polarized antenna configuration, sometimes referred to as the spatial MIMO configuration, is used.Type: ApplicationFiled: July 10, 2012Publication date: November 1, 2012Applicant: QUALCOMM IncorporatedInventors: Vikram Reddy Anreddy, Xinzhou Wu
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Patent number: 8024003Abstract: A communications device, e.g., a mobile wireless terminal, includes a plurality of antennas having different polarization directions. The plurality of antennas includes a first antenna and second antenna which are operated in a coordinated fashion. During reception a signal received via the first antenna is subjected to a phase shift operation before being combined with a signal received via the second antenna. During transmission a signal to be communicated is subjected to a phase shift operation and the phase shifted signal is transmitted over the first antenna while the non-phase shifted signal is transmitted over the second antenna. The amount of phase shift is a function of the difference in polarization directions between the first and second antennas. The novel antenna configuration facilitates the use of the horizontal polarization direction communications between the communications device and a base station without the need for directionally positioning one or more electrical antennas.Type: GrantFiled: March 6, 2008Date of Patent: September 20, 2011Assignee: QUALCOMM IncorporatedInventors: Juergen Cezanne, Saurabh Tavildar, Vikram Reddy Anreddy, Xinzhou Wu, Rajiv Laroia
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Patent number: 7991374Abstract: Methods and apparatus for supporting the communication of an information stream using an individual polarization type are described. For example, a first data stream is communicated from a base station sector transmitter using horizontal polarization signals and a second data stream is communicated using vertical polarization signals. A mobile wireless communications device, employing a plurality of dipole antennas associated with different direction polarizations, e.g., a first direction horizontal polarization dipole antenna, a second direction horizontal polarization dipole antenna and a vertical polarization dipole antenna, multiple receiver modules, and a combiner module, facilitates the recovery of horizontal polarization signals without the need for azimuth antenna orienting or repositioning, and also facilitates the recovery of vertical polarization signals.Type: GrantFiled: March 8, 2008Date of Patent: August 2, 2011Assignee: QUALCOMM IncorporatedInventors: Rajiv Laroia, Vikram Reddy Anreddy, Xinzhou Wu
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Publication number: 20090227260Abstract: Methods and apparatus which support the use of differently polarized antennas to schedule two or more users employing multiple antennas with different polarization, on the same communications segment, e.g. a time/frequency slab, in either the uplink or downlink are described. Various embodiments include an access node which classifies and schedules wireless terminals to segments as a function of suitability for single polarization direction communications. Some embodiments are directed to methods and apparatus for operating a communications device supporting the use of multiple antennas having different polarization, to implement a polarization based multiple access scheme. Unlike Spatial Division multiple access schemes, the users sharing a communications segment in the polarization based scheme need not be geographically well separated.Type: ApplicationFiled: March 6, 2008Publication date: September 10, 2009Applicant: QUALCOMM IncorporatedInventors: Vikram Reddy Anreddy, Saurabh Tavildar, Juergen Cezanne, Xinzhou Wu, Rajiv Laroia
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Publication number: 20090224990Abstract: A communications device, e.g., a mobile wireless terminal, includes a plurality of antennas having different associated polarization directions. The plurality of antennas includes an electrical antenna, e.g., a dipole antenna and a magnetic antenna, e.g., a loop antenna or a slot antenna. In one embodiment the electrical antenna is used for receiving and/or transmitting signals associated with a vertical polarization direction, while the magnetic antenna is used for receiving and/or transmitting signals associated with a horizontal polarization direction in some embodiments different data streams are communicated concurrently via the electrical and magnetic antennas. Methods for operating the communications device to switch between the electrical and magnetic antennas and/or to control reception and/or transmission are described.Type: ApplicationFiled: March 6, 2008Publication date: September 10, 2009Applicant: QUALCOMM IncorporatedInventors: Juergen Cezanne, Saurabh Tavildar, Vikram Reddy Anreddy, Xinzhou Wu, Rajiv Laroia
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Publication number: 20090227292Abstract: Methods and apparatus for using multiple antennas having different polarizations are described. Polarized antennas are advantageously deployed in a cellular network. Some of the cells utilize an antenna with a first direction polarization, while cells use an antenna with a second direction polarization, for a given carrier. Various embodiments are directed to methods and apparatus related to base station deployment which set up and/or operate base stations in accordance with an advantageous reuse pattern from the perspective of inter-cell interference. In some embodiments a plurality of carriers are used in addition to a plurality of different polarization direction antennas. In some such embodiments, a base station is configured so that for a given cell different carriers are associated with different direction polarization antennas. Some embodiments are directed to single sector base station implementations.Type: ApplicationFiled: March 8, 2008Publication date: September 10, 2009Applicant: QUALCOMM INCORPORATEDInventors: Rajiv Laroia, Vikram Reddy Anreddy, Xinzhou Wu
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Publication number: 20090224847Abstract: A communications device, e.g., a mobile wireless terminal, includes a plurality of antennas having different polarization directions. The plurality of antennas includes a first antenna and second antenna which are operated in a coordinated fashion. During reception a signal received via the first antenna is subjected to a phase shift operation before being combined with a signal received via the second antenna. During transmission a signal to be communicated is subjected to a phase shift operation and the phase shifted signal is transmitted over the first antenna while the non-phase shifted signal is transmitted over the second antenna. The amount of phase shift is a function of the difference in polarization directions between the first and second antennas. The novel antenna configuration facilitates the use of the horizontal polarization direction communications between the communications device and a base station without the need for directionally positioning one or more electrical antennas.Type: ApplicationFiled: March 6, 2008Publication date: September 10, 2009Applicant: QUALCOMM IncorporatedInventors: Juergen Cezanne, Saurabh Tavildar, Vikram Reddy Anreddy, Xinzhou Wu, Rajiv Laroia
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Publication number: 20090224992Abstract: Methods and apparatus for using multiple antennas having different polarizations are described. Polarized antennas are advantageously deployed in a cellular network. Some of the sectors utilize an antenna with a first direction polarization, while other sectors use an antenna with a second direction polarization, for a given carrier. Various embodiments are directed to methods and apparatus related to base station deployment which set up and/or operate base stations in accordance with an advantageous reuse pattern from the perspective of inter-cell and/or inter-sector interference. In some embodiments a plurality of carriers are used in addition to a plurality of different polarization direction antennas. In some such embodiments, a base station is configured so that for a given sector different carriers are associated with different direction polarization antennas. Some embodiments are directed to multi-sector base station implementations.Type: ApplicationFiled: March 8, 2008Publication date: September 10, 2009Applicant: QUALCOMM INCORPORATEDInventors: Rajiv Laroia, Vikram Reddy Anreddy, Xinzhou Wu
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Publication number: 20090224983Abstract: Methods and apparatus for supporting the communication of an information stream using an individual polarization type are described. For example, a first data stream is communicated from a base station sector transmitter using horizontal polarization signals and a second data stream is communicated using vertical polarization signals. A mobile wireless communications device, employing a plurality of dipole antennas associated with different direction polarizations, e.g., a first direction horizontal polarization dipole antenna, a second direction horizontal polarization dipole antenna and a vertical polarization dipole antenna, multiple receiver modules, and a combiner module, facilitates the recovery of horizontal polarization signals without the need for azimuth antenna orienting or repositioning, and also facilitates the recovery of vertical polarization signals.Type: ApplicationFiled: March 8, 2008Publication date: September 10, 2009Applicant: QUALCOMM INCORPORATEDInventors: Rajiv Laroia, Vikram Reddy Anreddy, Xinzhou Wu
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Publication number: 20090227291Abstract: Method and apparatus related to implementing and/or utilizing different polarization antennas with different corresponding average transmit power levels are described. Inter-cell interference is mitigated by having different cells with different power relationships between polarizations antennas. For example, a first base station transmits at a high average power level on its vertical polarization antenna and transmits at a low average power level on its horizontal polarization antenna. Concurrently, a second base station, which is adjacent to the first base station, transmits at a low average power level on its vertical polarization antenna and transmits at a high average power level on its horizontal polarization antenna. In some hexagonal deployment schemes a base station has at most two adjacent base stations using the same power level to antenna polarization direction relationship as it is using.Type: ApplicationFiled: March 6, 2008Publication date: September 10, 2009Applicant: QUALCOMM IncorporatedInventors: Xinzhou Wu, Vikram Reddy Anreddy, Junyi Li, Rajiv Laroia
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Publication number: 20090207093Abstract: A MIMO wireless communications device supports a dual polarized mode of antenna operation and a single polarized mode of antenna operation. Antenna mode selection is performed as a function of signal to noise ratio information and/or rank information corresponding to a communications channel matrix. One of a communications device's processing chains is switched between first and second polarization orientation antennas, e.g., vertical and horizontally polarized antennas, as a function of the antenna mode selection. In various embodiments, the dual polarized mode is advantageously used for high SNR users, while in the low SNR regime, where the capacity is limited by received power, the single polarized antenna configuration, sometimes referred to as the spatial MIMO configuration, is used.Type: ApplicationFiled: February 15, 2008Publication date: August 20, 2009Applicant: QUALCOMM INCORPORATEDInventors: Vikram Reddy Anreddy, Xinzhou Wu