Patent ID: 7133464
Filing Date: 2006-11-07
Classification: H04B,H04L

Abstract:
1. A transmission apparatus comprising: adjustable filter means for reducing leakage power outside a transmission signal band, said filter means having a first attenuation amount more than a predetermined amount and a second attenuation amount not more than the predetermined amount selectively set in a range higher than a transmission signal band; modulation means for modulating the transmission signal output from said filter means; control means for selecting, during operation, between the first and second attenuation amounts in said adjustable filter means in accordance with a use situation of a band adjacent to the transmission signal band and said adjustable filter means comprises a first low-pass filter having the first attenuation amount, and a second low-pass filter having the second attenuation amount, and said control means selects one of said first and second low-pass filters in accordance with the use situation of the band adjacent to the transmission signal band.