Transmission of a common pilot channel from a beamforming transmit antenna array
First Claim
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1. A method comprising:
- transmitting from a first antenna array a dedicated signal with a narrow beamwidth directed to a remote terminal, the transmit antenna array having a plurality of elements arranged in a substantially linear pattern;
transmitting from an element of the first antenna array that is in the center of the substantially linear pattern, a common pilot signal for receipt by the remote terminal, the common pilot signal being transmitted with a wide beamwidth.
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Abstract
A method and apparatus are provided that allows beamforming to be used on a user-specific signal together with a sector-wide pilot signal in a communication system, such as a CDMA system. In one embodiment, the invention includes a plurality of elements in a defined order to transmit spatially directed signals to specific receiving radio terminals, and a single element, substantially in the center of the ordering to transmit a single pilot signal simultaneously to a plurality of receiving radio terminals.
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Citations
32 Claims
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1. A method comprising:
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transmitting from a first antenna array a dedicated signal with a narrow beamwidth directed to a remote terminal, the transmit antenna array having a plurality of elements arranged in a substantially linear pattern; transmitting from an element of the first antenna array that is in the center of the substantially linear pattern, a common pilot signal for receipt by the remote terminal, the common pilot signal being transmitted with a wide beamwidth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A machine-readable medium having stored thereon data representing instructions which, when executed by a machine, cause the machine to perform operations comprising:
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transmitting from a first antenna array a dedicated signal with a narrow beamwidth directed to a remote terminal, the transmit antenna array having a plurality of elements arranged in a substantially linear pattern; transmitting from an element of the first antenna array that is in the center of the substantially linear pattern, a common pilot signal for receipt by the remote terminal, the common pilot signal being transmitted with a wide beamwidth. - View Dependent Claims (11, 12, 13, 14)
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15. An apparatus comprising:
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a first transmit antenna array to transmit a dedicated signal with a narrow beamwidth directed to a remote terminal, the transmit antenna array having a plurality of elements arranged in a substantially linear pattern; an element of the first antenna array that is in the center of the substantially linear pattern to transmit a common pilot signal for receipt by the remote terminal, the common pilot signal being transmitted with a wide beamwidth. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. An antenna array for a spatial diversity radio transmission system comprising:
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a plurality of elements in a defined order to transmit spatially directed signals to specific receiving radio terminals; and a single element, substantially in the center of the ordering to transmit a single pilot signal simultaneously to a plurality of receiving radio terminals. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification