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Bo Zhou

Biography

Enrollment Date: 2007

Graduation Date：2011

Degree：Ph.D.

Defense Date：2011.12.22

Advisors：Zhihua Wang Woogeun Rhee

Department：Institute of Microelectronics，Tsinghua University

Title of Dissertation/Thesis：Study on frequency modulation ultrawideband transceiver

Abstract:
From 2003 on, people focus more and more on FM-UWB transceiver. However, to the present, it has still many technique disadvantages and is lack of system-level power optimization method. To solve the existing design deficiencies, the main research items and achievements of this dissertation are as follow: The existing implementation techniques are reviewed and their deficiencies are clarified. The principle of FM-UWB transceiver is presented with design difficulties focused on. Considering the existing technique deficiencies and design difficulties, innovative transmitter architecture and optimized receiver implementation are proposed. System-level dynamic power optimization method based on data edge detection and trigger is proposed for the first time, the experimental results show that 53% power saving is achieved. Data transition detection logic is included in the transmitter and envelope detector is used in the receiver. The RF current-starving modules of the transceiver are only active for a half-bit period during data transition, and the receiver will not lose data information by adding some simple digital logic. Innovative FM-UWB transmitter architecture is proposed, including multi-phase fractional-N phase-locked loop (PLL) based subcarrier generation, and quasi-continuous frequency-locked loop (FLL) based RF center frequency calibration. The proposed architecture is fit for high data rate application and CMOS fabrication, eliminates switch noise and improves system reconfiguration, as well as simplies design implementation. Innovative architecture of multi-phase triangular / square waveform generator is proposed. Different from conventional open-loop mode, Four-phase architecture based on closed-loop mode achieves good phase match. Eight-phase architecture is given for the first time based on the published literature. Dual-path RF voltage-controlled oscillator (VCO) is proposed. Pseudo differential open-loop frequency modulated path improves modulation linearity, and single-ended closed-loop calibration path ensures RF center frequency stable. Different from the existing first-calibration later-modulation mode, the proposed architecture conducts modulation and calibration simultaneously. Analog phase-interpolator delay line based RF FM demodulator with widely tunable delay is proposed. The presented architecture fit for CMOS fabrication, has an analog delay tuned finely and continuously with simple implementation, which benefits demodulator performance optimization in RF bandwidth and sensitivity, and ensures high robustness. FM-UWB transmitters and transceiver are implemented in UMC 180nm CMOS to verify the proposed techniques and methods above. The reconfiguration design on subcarrier modulation index, RF center frequency and UWB bandwidth is achieved.

Publications

Papers：：

[1] Bo Zhou, Yifan L, Zuhang Wang, Chen Wang, Woogeun Rhee, Zhihua Wang, A Low-Complexity FM-UWB Transmitter With Digital Reuse and Analog Stacking, IEEE Journal of Solid-State Circuits, Vol.PP, No.99, pp.1-12, 2023.

[2] Wei Zhang,Yizhi Han,Fei Chen,Bo Zhou,Xican Chen,Woogeun Rhee,Zhihua Wang, A 3.5–4GHz FMCW radar transceiver design with phase-domain oversampled ranging by utilizing a 1-bit ΔΣ TDC, VLSI-DAT 2014, pp. 1 - 4, 2014.

[3] Bo Zhou,Woogeun Rhee,Dongwook Kim,Zhihua Wang, Reconfigurable FM-UWB transmitter design for robust short range communications, Telecommunication Systems, Vol.52, No.2, pp. 1133 - 1144, 2013.

[4] Woogeun Rhee,Ni Xu,Bo Zhou,Zhihua Wang, Fractional-N Frequency Synthesis: Overview and Practical Aspects with FIR-Embedded Design, Journal of Semiconductor Technology and Science, Vol.13, No.2, pp. 170 - 183, 2013.

[5] Bo Zhou,Fei Chen,Woogeun Rhee,Zhihua Wang, A Reconfigurable FM-UWB Transceiver for Short-Range Wireless Communications, IEEE Microwave and Wireless Components Letters, Vol.23, No.7, pp. 371 - 373, 2013.

[6] Hang Lv,Bo Zhou,Dang Liu,Woogeun Rhee,Yongming Li,Zhihua Wang, A 5.2–11.8MHz octa-phase relaxation oscillator for 8-PSK FM-UWB transceiver systems, VLSI-DAT 2013, pp. 1 - 4, 2013.

[7] Bo Zhou,Jian Qiao,Rui He,Jinghui Liu,Wei Zhang,Hang Lv,Woogeun Rhee,Yongming Li,Zhihua Wang, A Gated FM-UWB System With Data-Driven Front-End Power Control, IEEE Transactions on Circuits and Systems I-Regular Papers, Vol.59, No.6, pp. 1348 - 1358, 2012.

[8] Bo Zhou,Woogeun Rhee,Zhihua Wang, Relaxation Oscillator with Quadrature Triangular and Square Waveform Generation, Electronics Letters, Vol.47, No.13, pp. 779 - 780, 2011.

[9] Bo Zhou,Woogeun Rhee,Zhihua Wang, Reconfigurable FM-UWB Transmitter, Electronics Letters, Vol.47, No.10, pp. 628 - 629, 2011.

[10] Jun Li,Bo Zhou,Yuanfeng Sun,Woogeun Rhee,Zhihua Wang, Reconfigurable, Spectrally Efficient, High Data Rate IR-UWB Transmitter Design Using a Δ–Σ PLL Driven ILO and a 7-Tap FIR Filter, VLSI-DAT 2011, pp. 1 - 4, 2011.

[11] Woogeun Rhee,Bo Zhou,Zhihua Wang, Fractional-N frequency synthesis: Overview and design perspectives, RFIT 2011, pp. 125 - 128, 2011.

[12] Bo Zhou,Hang Lv,Min Wang,Jinghui Liu,Woogeun Rhee,Yongming Li,Dongwook Kim,Zhihua Wang, A 1Mb/s 3.2–4.4GHz reconfigurable FM-UWB transmitter in 0.18μm CMOS, RFIC 2011, pp. 1 - 4, 2011.

[13] Hang Lv,Bo Zhou,Woogeun Rhee,Yongming Li,Zhihua Wang, A Relaxation Oscillator with Multi-Phase Triangular Waveform Generation, ISCAS 2011, pp. 2837 - 2840, 2011.

[14] Min Wang,Bo Zhou,Woogeun Rhee,Zhihua Wang, Continuously Auto-Tuned and Self-Ranged Dual-path PLL design with Hybrid AFC, ICICDT 2011, pp. 1 - 4, 2011.

[15] Bo Zhou,Jian Qiao,Woogeun Rhee,Zhihua Wang, Relaxation Oscillator with Quadrature Triangular Waveform Generation, Electronic Letters, pp. 1 - 4, 2010.

[16] Woogeun Rhee,Ni Xu,Bo Zhou,Zhihua Wang, Low Power, Non Invasive UWB Systems for WBAN and Biomedical Applications, ICTC 2010, pp. 35 - 40, 2010.

[17] Bo Zhou,Rui He,Jian Qiao,Jinghui Liu,Woogeun Rhee,Zhihua Wang, A Low Data Rate FM-UWB Transmitter with Δ−Σ Based Sub-Carrier Modulation and Quasi-Continuous Frequency-Locked Loop, A-SSCC 2010, pp. 1 - 4, 2010.