Patent ID: 7149238

Claim:
A highly bandwidth-efficient communications method to optimize a multiple cell network for inter-cell interference, comprising: receiving at a first base station located in a first cell, a first spread signal comprising a first data signal spread over a plurality of discrete tones received over a first path from a first remote station located in said first cell, said first signal further comprising an interfering signal spread over said plurality of discrete tones received over an interference path from a second remote station located in a second cell; adaptively despreading the signal received at the first base station by using first despreading codes that are based on the characteristics of the received spread signal over said first path and over said interference path; spreading a second data signal at the first base station with first spreading codes derived from said despreading codes based on a retrodirectivity of said first path and of said interference path, the first spreading codes distributing the second data signal over a plurality of discrete tones, forming a second spread signal that is selectively diminished in said interfering path to said second remote station; transmitting said second spread signal from the first base station over said first path to said first remote station and transmitting the second signal selectively diminished over said interference path to said second remote station; receiving at said second remote station said selectively diminished second spread signal; adaptively despreading the selectively diminished second signal received at the second remote station by using second despreading codes that are based on the characteristics of the received second signal over said interference path; spreading a third data signal at the second remote station with second spreading codes derived from said second despreading codes based on a retrodirectivity of said interference path, the second spreading codes distributing the third data signal over a plurality of discrete tones, forming a third spread signal that is selectively diminished in said interfering path to said first base station; and transmitting said selectively diminished third spread signal from the second remote station over said interference path to said first base station.