Therefore, when the output signal y1 of {HEAD ~ the main power amplifier} 201 and the output signal y4 are applied to {TAIL ~ the first synthesizer} 220, the intermodulation components are removed from the output signal y1 of the main power amplifier 201, and an amplified signal Vo containing only the pilot tones is outputted 
Therefore , when the output signal y1 of { HEAD ~ the main power amplifier } 201 and the output signal y4 are applied to { TAIL ~ the first synthesizer } 220 , the intermodulation components are removed from the output signal y1 of the main power amplifier 201 , and an amplified signal Vo containing only the pilot tones is outputted
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH