Patent ID: 7511608

Claim:
A tire pressure monitoring system (TPMS) receiver comprising: a storage unit configured to store transmitter identification values (IDs) associated with a plurality of tire pressure monitoring system (TPMS) transmitters, wherein each stored transmitter ID is associated with a respective TPMS transmitter; a receiving unit configured to receive a transmitted tire pressure monitoring system (TPMS) telegram and a transmitted checksum calculated from the telegram and one of the transmitter IDs; a calculating unit configured to calculate, on receipt of the telegram, a test checksum from the received telegram and one of the stored IDs; a comparing unit configured to compare the test checksum with the received checksum; and an identification unit configured to identify a source transmitter via a stored transmitter ID used to calculate the test checksum, in response to the comparing unit finding a match between the test checksum and the received checksum.