The critical interference in radar systems is unwanted echo named clutter. Some important clutter includes echoes from land, weather (particularly rain), sea and deliberated chaff. Therefore, a military radar designer is faced with the problem of how to reject interference. In this paper, chaff elimination methods such as Doppler processing and log-FTC are discussed and then an antichaff algorithm suitable in transient and steady descending state is introduced. Also, this technique is applicable and independent on chaff type and central frequency.