TRANSMISSION DEVICE AND METHOD FOR CONTROLLING SAME

WIPO Patent Application WO/2015/114702

A1

A transmission device (1) in one embodiment contains the following: pulse-signal generators (102, 103) that convert a carrier wave (CW1) and another carrier wave (CW2) that is 90° out of phase with said carrier wave (CW1) to pulse signals (P1, P2), respectively, and output said pulse signals; delta-sigma modulators (104, 105) that output delta-sigma modulated signals (M1, M2) obtained by subjecting an in-phase component signal (I) and a quadrature component signal (Q) from a baseband signal to delta-sigma modulation synchronized on the respective pulse signals (P1, P2); a multiplier (106) that generates an RF pulse-modulated signal (R1) by multiplying one delta-sigma modulated signal (M1) by the first pulse signal (P1); a multiplier (107) that generates another RF pulse-modulated signal (R2) by multiplying the other delta-sigma modulated signal (M2) by the other pulse signal (P2); a switching-amplifier unit (20) that amplifies the RF pulse-modulated signals (R1, R2); and a combiner (15) that combines the RF pulse-modulated signals (R1, R2) amplified by said switching-amplifier unit (20).

TAWA NORIAKI (JP)

PCT/JP2014/005478

August 06, 2015

October 29, 2014

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NEC CORP (JP)

H03F3/217; H04B1/04; H04L27/36

JP2011077741A

2011-04-14

FRAPPE, A.; ET AL.: "A digital DELTA? RF signal generator for mobile communication transmitters in 90nm CMOS", RADIO FREQUENCY INTEGRATED CIRCUITS SYMPOSIUM, 2008. RFIC 2008., 2008, pages 13 - 16, XP031284274

IEIRI, Takeshi (JP)
House ON 健 (JP)

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