Patent ID: 7664478

Claim:
A DC offset value cancel control method comprising: a detecting/holding step of obtaining a DC offset value generated in a transmitter/receiver and holding the obtained DC offset value, and removing the held DC offset from received data; a transmission completion detecting step of detecting the completion of transmitting operation performed by said transmitter/receiver; a first control step of executing said detecting/holding step when said transmission completion detecting step detects the completion of transmitting operation; a reception completion detecting step of detecting the completion of receiving operation performed by said transmitter/receiver; and a second control step of executing said detecting/holding step when said reception completion detecting step detects the completion of receiving operation, wherein said second control step executes said detecting/holding step after a predetermined time elapses, wherein said second control step checks a status of and a carrier detection signal in said transmitter/receiver after said predetermined time elapses, and executes said detecting/holding step when said transmitter/receiver is neither in a transmission state nor in a carrier detecting state.