Spatial spectrum analyzer

A network node for a Radio Access Network (RAN) of a wireless communication system, comprising processing circuitry configured to cause the network node to:

• determine that a link quality for at least one carrier of a plurality of carriers within a bandwidth of a wideband receiver of the network node is less than a predefined or configured link quality threshold;
• for each carrier of the at least one carrier for which the link quality is less than the predefined or configured link quality threshold:
• obtain complex data samples of a received narrowband signal received via a narrowband receiver of the network node that is tuned to a portion of the frequency band used by the wideband receiver that comprises the carrier for which the link quality is less than the predefined or configured link quality threshold;
• and
• determine, based on the complex data samples of the narrowband signal, one or more directions from which interference is to be mitigated;
• and
• receive a wideband signal using a beam pattern which comprises one or more nulls at the directions from which interference is to be mitigated.

A method performed by a network node in a Radio Access Network (RAN) of a wireless communication system, the method comprising:

• performing radar scanning over a frequency band using a plurality of beam patterns having corresponding primary beam lobes at different beam angles, other than a subset of the plurality of beam patterns to be excluded from radar scanning, using a wideband transmitter and a wideband receiver of the network node;
• obtaining complex samples of a narrowband signal received via a narrowband receiver of the network node that is tuned to a portion of the frequency band over which the network node performs the radar scanning;
• determining, based on the complex samples of the narrowband signal, one or more directions for which interference is to be mitigated;
• and
• updating (1206) the subset of the plurality of beam patterns to be excluded from radar scanning based on the determined one or more directions for which interference is to be mitigated.

A network node for a Radio Access Network (RAN) of a wireless communication system, the network node comprising processing circuitry configured to cause the network node to:

• perform radar scanning over a frequency band using a plurality of beam patterns having corresponding primary beam lobes at different beam angles, other than a subset of the plurality of beam patterns to be excluded from radar scanning, using a wideband transmitter and a wideband receiver of the network node;
• obtain complex samples of a narrowband signal received via a narrowband receiver of the network node that is tuned to a portion of the frequency band over which the network node performs the radar scanning;
• determine, based on the complex samples of the narrowband signal, one or more directions for which interference is to be mitigated;
• and
• update the subset of the plurality of beam patterns to be excluded from radar scanning based on the determined one or more directions for which interference is to be mitigated.