Ping-Yuan Tsai

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This paper presents an all-digital signal component separator (SCS) with low power overhead for uneven multilevel LINC (UMLINC) systems, including a multi-level phase calculator (MLPC) and a digitally-control phase shifter (DCPS) pair. The optimal gain level with branch mismatch consideration is proposed to achieve maximal average efficiency 44.82%. This(More)
This work proposes an orthogonal frequency division multiplexing (OFDM) based baseband transceiver design for wireless body area network (WBAN) application. Based on the analysis of the WBAN operation behavior, high transmission data rate and low power implementation techniques are proposed to reduce the transmission energy. An electrocardiography (ECG)(More)
This paper presents a sub-mW all-digital signal component separator (SCS) with a novel branch mismatch compensation scheme for OFDM LINC transmitters, including a phase calculator and a digital-control phase shifter (DCPS) pair. This chip is manufactured in 90nm standard CMOS process with active area 0.06mm. The DCPS can generate phase-modulated signal at(More)
This paper presents an energy-efficient sensor node transmitter for body channel communication (BCC) system. The OFDM modulation is adopted in this work to achieve both high transmission data rate and spectrum efficiency. To reduce the power dissipation of the front-end (FE) circuits, a phasemodulated outphasing architecture is applied to avoid the(More)
LINC can achieve linear amplification by using high-efficiency amplifiers. This work presents an all-digital LINC signal component separator (SCS) including the phase calculation digital signal processing and two digital-control phase shifters (DCPSs). With the duplicate DCPSs, a pre-calibration scheme is introduced to guarantee the codeword-to-phase(More)
This paper presents a low-power all-digital phase modulator (PM) pair to generate constantenvelope signals for LINC transmitters. To reduce the power overhead, an open-loop delay line based phase shifter with a continuous locking scheme is adopted for the PM design. This design is implemented by 90 nm CMOS technology with active area of 0.1892 mm. The PM(More)
This paper proposes an energy-efficient transceiver for body channel communication. 16-QAM OFDM is adopted to enhance the data rate and (2,1,6) convolutional code is integrated to remain the transmission reliability, where the hard-decision Viterbi Decoder gives the coding gain by 2dB. The modulator of the transceiver provides two modes - high speed mode(More)
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