Methods and apparatus for using multiple antennas having different polarization
First Claim
1. A method of operating a wireless communications device, the method comprising:
- operating during a first period of time in a dual polarized mode of antenna operation;
operating during a second period of time in a single polarized mode of antenna operation, said first and second periods of time being different; and
selecting the dual polarized mode of antenna operation or the single polarized mode of antenna operation based on a quality of pilot signals received during a previous data interval.
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Accused Products
Abstract
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.
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Citations
38 Claims
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1. A method of operating a wireless communications device, the method comprising:
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operating during a first period of time in a dual polarized mode of antenna operation; operating during a second period of time in a single polarized mode of antenna operation, said first and second periods of time being different; and selecting the dual polarized mode of antenna operation or the single polarized mode of antenna operation based on a quality of pilot signals received during a previous data interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A communications device comprising:
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means for operating the device during a first period of time in a dual polarized mode of antenna operation; means for operating the device during a second period of time in a single polarized mode of antenna operation, said first and second periods of time being different; and means for selecting the dual polarized mode of antenna operation or the single polarized mode of antenna operation based on a quality of pilot signals received during a previous data interval. - View Dependent Claims (16, 17)
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18. A computer readable medium embodying machine executable instructions for controlling a device to implement a method, the method comprising:
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operating during a first period of time in a dual polarized mode of antenna operation; operating during a second period of time in a single polarized mode of antenna operation, said first and second periods of time being different; and selecting the dual polarized mode of antenna operation or the single polarized mode of antenna operation based on a quality of pilot signals received during a previous data interval. - View Dependent Claims (19, 20)
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21. A wireless communications device comprising:
a processor configured to control said device to; operate during a first period of time in a dual polarized mode of antenna operation; operate during a second period of time in a single polarized mode of antenna operation, said first and second periods of time being different; and select the dual polarized mode of antenna operation or the single polarized mode of antenna operation based on a quality of pilot signals received during a previous data interval. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
Specification