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US 2015/0085950 A1Published application
Antenna systems with common overhead for cdma base stations
AssigneeApple Inc.
InventorsAbdelgader Legnain, Peter Deane, Neil M. McGowan
Life of this patent
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Abstract
Systems and methods for use in CDMA antenna systems are provided in which signals each having a common overhead component are transmitted on a set of adjacent beams of a sector with a micro-timing offset between signals transmitted on adjacent pairs of beams which is large enough that destructive cancellation substantially does not occur between the pair of beams.
Claims21
-20. (canceled)
An antenna system for a transmitter comprising:
- a plurality of antennas, each antenna configured to transmit a corresponding beam within a coverage area;
- transmit circuitry configured to generate a corresponding transmit signal for each antenna to transmit the corresponding beam;
- wherein each pair of transmit signals used to generate beams from corresponding antennas that overlap in coverage area are adjusted so that destructive interference in beam overlap regions substantially does not occur.
A method for generating a plurality of radio frequency beams that cover a coverage area of a cell of a wireless network, the method comprising:
- generating a plurality of transmit signals;
- and
- transmitting the plurality of transmit signals through a plurality of antennas, each antenna configured to transmit a corresponding radio frequency beam of the plurality of radio frequency beams within the coverage area of the cell of the wireless network,
- wherein for each pair of radio frequency beams that overlap in the coverage area, the corresponding transmit signals of the plurality of transmit signals used to generate the radio frequency beams are adjusted so that destructive interference in radio frequency beam overlap regions substantially does not occur.
1 more element
Dependencies are inferred from the claim text.