Methods and apparatus for using antennas with different polarization and signal transmit powers

摘要

Method and apparatus related to implementing and/or utilizing different polarization antennas with different corresponding average transmit power levels are described. Inter-cell interference is mitigated by having different cells with different power relationships between polarizations antennas. For example, a first base station transmits at a high average power level on its vertical polarization antenna and transmits at a low average power level on its horizontal polarization antenna. Concurrently, a second base station, which is adjacent to the first base station, transmits at a low average power level on its vertical polarization antenna and transmits at a high average power level on its horizontal polarization antenna. In some hexagonal deployment schemes a base station has at most two adjacent base stations using the same power level to antenna polarization direction relationship as it is using.

主权项

1. A system comprising:
a first base station, said first base station including an antenna assembly including a first antenna having a first polarization and a second antenna having a second polarization, said first and second polarizations being different by at least 45 degrees; a first transmitter module coupled to the first antenna, said first transmitter module transmitting at a first average power level during a first period of time; and a second transmitter module coupled to the second antenna, said second transmitter module transmitting at a second average power level during said first period of time, said second average power level being lower than the first average power level by more than 2 dB, wherein the first antenna and the second antenna provide service to a first sector, wherein an adjacent base station adjacent to the first base station transmits the second polarization at a higher average power level than the adjacent base station transmits the first polarization, wherein the first and second transmitter modules, using the first and second antennas, respectively, are configured to transmit to a wireless terminal at the same time.