Switched combining antenna diversity technique

A communication device comprising:

• at least two antennae,
• an antenna switch for switching between the at least two antennae,
• an AGC (automatic gain control) unit for controlling a gain, and
• a diversity controller for controlling the antenna switch to select one of the at least two antennae,
• wherein said diversity controller is coupled to an output of the AGC unit for receiving a gain signal indicating a gain value and to a control input of the antenna switch for controlling the operation of said antenna switch, and comprises a threshold detector for determining whether the gain value indicated by the received gain signal is below a predetermined threshold value,
• wherein the diversity controller is arranged for starting a periodic switching process, determining whether the gain value for one of the at least two antennae is below said predetermined threshold value, and if so, stopping said periodic switching process.

A wireless LAN (Local Area Network) receiver comprising:

• at least two antennae,
• an antenna switch for switching between the at least two antennae,
• an AGC (automatic gain control) unit for controlling a gain, and
• a diversity controller for controlling the antenna switch to select one of the at least two antennae,
• wherein said diversity controller is coupled to an output of the AGC unit for receiving a gain signal indicating a gain value and to a control input of the antenna switch for controlling the operation of said antenna switch, and comprises a threshold detector for determining whether the gain value indicated by the received gain signal is below a predetermined threshold value,
• wherein the diversity controller is arranged for starting a periodic switching process, determining whether the gain value for one of the at least two antennae is below said predetermined threshold value, and if so, stopping said periodic switching process.