Antenna systems with common overhead for CDMA base stations

摘要

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.

主权项

1. 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 by applying micro-timing offsets to a sector-specific spreading sequence used to generate the transmit signals.