Method for reducing multi-cell interferences in wireless communications

A method comprising:

• dividing a cell that is served by a base station into a plurality of segments;
• partitioning a frequency spectrum in which the base station transmits and receives signals in the cell into a plurality of sub-channels, where each sub-channel comprises a plurality of subcarriers arranged in accordance with a predetermined permutation;
• assigning a different sub-channel as a primary channel which the base station uses in each of a corresponding one of the plurality of segments such that segments within the cell are allocated different portions of the same spectrum for their corresponding primary channels;
• determining at the base station which of the plurality of segments a desired wireless mobile station enters the cell based on an acknowledgement message received from the desired wireless mobile station at the base station;
• calculating a first spatial signature associated with signals received at the base station from the desired wireless mobile station;
• calculating a second spatial signature associated with an interference signal received at the base station from one or more wireless mobile stations in one or more neighboring cells;
• and
• generating a beamforming weighting vector from the first and second spatial signatures used by the base station to enhance the signals associated with the desired wireless mobile station and to suppress the interference signal.

A method comprising:

• dividing a cell that is served by a base station into a plurality of segments;
• partitioning a frequency spectrum in which the base station transmits and receives signals in the cell into a plurality of sub-channels, where each sub-channel comprises a plurality of subcarriers;
• assigning a different sub-channel as a primary channel which the base station uses in each of a corresponding one of the plurality of segments such that segments within the cell are allocated different portions of the same spectrum for their corresponding primary channels;
• determining at the base station which of the plurality of segments a desired wireless mobile station enters the cell;
• calculating a first spatial signature associated with signals received at the base station from the desired wireless mobile station;
• identifying a plurality of potential multi-cell interference sources and a plurality of active multi-cell interference sources associated with a plurality of wireless mobile stations in one or more neighboring cells;
• calculating a second spatial signature associated with interference signals from the plurality of potential and active multi-cell interference sources;
• and
• generating a beamforming weighting vector from the first and second spatial signatures used by the base station to enhance the signals associated with the desired wireless mobile station and to suppress the interference signals.