MITIGATION TECHNIQUES THAT MAY BE USED BY PASSIVE SERVICES

• SITE SHIELDING AND SITE SELECTION

• QUIET ZONES AND COORDINATION ZONES

• RECEIVER ARCHITECTURE

• ANTENNA PATTERNS

• ANALOGUE FILTERING AT EITHER RF OR IF STAGES

• INTERFERENCE EXCISION TECHNIQUES

• DIGITAL ADAPTIVE INTERFERENCE CANCELLATION

• ADJUSTMENT OF SENSITIVITY LEVELS

• COOPERATIVE SOLUTIONS

• GUARDBANDS

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Examples of excision

a) excision at the baseband/digital level:

- gating/blanking;

- single channel filtering (conventional filter, wavelet transform);

- for phased arrays: nulling, gating, projection techniques (spatial-spectral-temporal);

- adaptive filtering/side lobe canceling;

- time sharing;

b) excision at the post-processing level:

- removing interference by blanking/gating;

- cleaning interference from maps by using mathematical-type algorithms.