System and methods for null steering in a multicarrier system

A method for cancelling spatial interference associated with an original multi-carrier signal carrying at least one data transmission sent by a transmitter to an antenna array comprising a plurality of antennae and having a receiver operatively associated therewith, the method receiving a plurality of received signals respectively including said interference and said original signal as received by a respective individual antenna from among the plurality of antennae, the method comprising:

• using a spatial nulling device for generating a cleaner signal by reducing at least one spatial component of said interference;
• and
• manipulating a derivative of said received signals so as to cause said at least one data transmission to be more concentrated in a subset of frequency bands in which the spatial nulling device is more effective and to be less concentrated in frequency bands which do not belong to said subset of frequency bands,
• wherein said manipulating comprises using a programmable band limited noise injector device which adds noise to a signal derived from a signal received by at least one of the antennae such that noise is added only to frequency bands outside the subset and not to frequency bands inside the subset.