Adaptive signal reception

A method for use in a robotic lawnmower system for performing improved reception of a transmitted signal, the robotic lawnmower system comprising:

• a robotic lawnmower and a charging station, said charging station comprising a signal generator being configured to transmit a boundary signal utilizing CDMA coding having a frame length corresponding to a full frame length through a boundary wire, wherein said signal generator is configured to transmit said boundary signal in subframes, and wherein said robotic lawnmower is configured to receive said boundary signal by detecting magnetic fields generated by the boundary signal, and wherein the method comprises:
• determining a set of conditions,
• determining if said set of conditions correspond to a first set of conditions, and if so listen to the subframes, and
• determining if said set of conditions correspond to a second set of conditions, and if so listen to the full frames,
• wherein the robotic lawnmower is further configured to determine that the set of conditions correspond to a third set of conditions, and in response thereto listen to the subframes and the full frame,
• wherein the third set of conditions include a received high signal strength level and low signal quality level, and
• wherein the set of conditions are used to determine proximity of the robotic lawnmower from the boundary cable and/or to determine noise level within a work area defined by the boundary wire.

A computer program product comprising non-transitory memory storing instructions for execution of a method for use in a robotic lawnmower system for performing improved reception of a transmitted signal, the robotic lawnmower system comprising:

• a robotic lawnmower and a charging station, said charging station comprising a signal generator being configured to transmit a boundary signal utilizing CDMA coding having a frame length corresponding to a full frame length through a boundary wire, wherein said signal generator is configured to transmit said boundary signal in subframes, and wherein said robotic lawnmower is configured to receive said boundary signal by detecting magnetic fields generated by the boundary signal, and wherein the method comprises:
• determining a set of conditions,
• determining if said set of conditions correspond to a first set of conditions, and if so listen to the subframes, and
• determining if said set of conditions correspond to a second set of conditions, and if so listen to the full frames,
• wherein the robotic lawnmower is further configured to determine that the set of conditions correspond to a third set of conditions, and in response thereto listen to the subframes and the full frame,
• wherein the third set of conditions include a received high signal strength level and low signal quality level, and
• wherein the set of conditions are used to determine proximity of the robotic lawnmower from the boundary cable and/or to determine noise level within a work area defined by the boundary wire.