Smart key apparatus and method for processing signal of smart key apparatus

A method for processing a signal of a smart key apparatus, the method comprising:

• determining, by a controller, a first reception antenna by sequentially verifying a reception level according to a set order of a plurality of antennas when receiving a Low Frequency (LF) signal from the plurality of antennas which receive an LF signal from a vehicle via a plurality of reception axes;
• processing, by the controller, an LF signal which is received via the first reception antenna;
• comparing, by the controller, a reception level that corresponds to each of the plurality of antennas when a communication error with the vehicle occurs;
• determining, by the controller, an antenna having a highest reception level among the plurality of antennas as a second reception antenna based on the comparison;
• and
• processing, by the controller, an LF signal which is received via the second reception antenna.

A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:

• program instructions that determine a first reception antenna by sequentially verifying a reception level according to a set order of a plurality of antennas when receiving a Low Frequency (LF) signal from the plurality of antennas which receive an LF signal from a vehicle via a plurality of reception axes;
• program instructions that process an LF signal which is received via the first reception antenna;
• program instructions that compare a reception level that corresponds to each of the plurality of antennas when a communication error with the vehicle occurs;
• program instructions that determine an antenna having a highest reception level among the plurality of antennas as a second reception antenna based on the comparison;
• and
• program instructions that process an LF signal which is received via the second reception antenna.