Method and apparatus for transmission polarization selection for a cellular base station
First Claim
1. A method for transmission polarization selection comprising:
- receiving a signal from a device, the signal being received at two or three polarizations, each polarization being orthogonal to each other;
determining the polarization receiving the signal having the best performance characteristics; and
transmitting to the device using a polarization the same as that receiving the signal having the best performance characteristics.
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Accused Products
Abstract
A method and apparatus for transmission polarization selection that includes receiving a signal from a device where the signal is received at two or three polarizations each polarization being orthogonal to each other. The polarization receiving the signal having the best performance characteristics is determined. Transmissions to the device are routed through appropriate transceivers and antennas such that they are transmitted using a polarization the same as that receiving the signal having the best performance characteristics. Performance characteristics measured may include highest power level, highest signal to noise ratio (SNR), highest carrier to interference ratio (CIR), highest signal to noise plus interference ratio (SNIR), lowest bit error ratio (BER), or lowest block error ratio (BLER).
35 Citations
48 Claims
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1. A method for transmission polarization selection comprising:
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receiving a signal from a device, the signal being received at two or three polarizations, each polarization being orthogonal to each other;
determining the polarization receiving the signal having the best performance characteristics; and
transmitting to the device using a polarization the same as that receiving the signal having the best performance characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for transmission polarization selection at a base station comprising:
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receiving a signal from each of a plurality of mobile devices, each signal being received at a base station, each signal being received at polarizations orthogonal to each other;
determining for each signal received from each mobile device the polarization receiving the signal having the best performance characteristics; and
transmitting to each mobile device using a polarization the same as that receiving the signal having the best performance characteristics for the received signal from that mobile device. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A base station for transmission polarization selection comprising:
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at least two antenna receive ports, the at least two antenna receive ports having at least two orthogonal polarizations, the at least two antenna receive ports receiving a signal from a mobile device;
at least two antenna transmit ports, the at least two antenna transmit ports having at least two orthogonal polarizations; and
a processor subsystem, the processor subsystem measuring performance characteristics of the signal received at each at least two antenna receive ports, the processor subsystem determining which antenna receive port received the signal with the best performance characteristics and controlling transmissions from the base station to the mobile device to be sent on the at least two antenna transmit ports having the same polarization as the antenna receive port receiving the signal with the best performance characteristics. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. An apparatus comprising a storage medium with instructions stored therein, the instructions when executed causing a computing device to perform:
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receiving a signal from a device, the signal being received at two or three polarizations orthogonal to each other;
determining the polarization receiving the signal having the best performance characteristics; and
transmitting to the device using a polarization the same as that receiving the signal having the best performance characteristics.
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Specification