Biography

Enrollment Date: 2012

Graduation Date：2015

Degree：M.S.

Defense Date：2015.06.02

Department：Institute of Microelectronics，Tsinghua University

Title of Dissertation/Thesis：Impulse-Radio Ultra-Wideband Transceivers for Low-Power Short-Range High-Data-Rate Wireless Communication

Abstract:
With the rapid development of mobile Internet and smart phones the rapid popularization of mobile devices such as mobile phones as the core to complete the health management in People's Daily life, entertainment, interactive functions such as hardware and software ecosystem attracts people's attention more and more. In particular by mobile phone and other mobile devices and distribution around the human body sensor composed of wireless body area network (WBAN) favored by many Internet hardware companies, companies have launched the WBAN standard intelligent bracelet as a preemptive move the entrance to the medical treatment. "Smart home" and "Internet +" emerging concepts such as the proposed to further for short-range wireless transceiver technology created the broad application prospect, at the same time the emergence of the new concept will also put forward new challenge for the existing technology. Ultra-wideband (UWB) communication system because of its rich resource and low transmission power band has a unique advantage in the field of short distance wireless communication. Realize UWB communication in many ways ultra-wideband (IR - UWB) pulse technology in every once in a while to send a very narrow pulse transmission data, the characteristics of the intermittent work make the system has low power consumption, narrow pulse transceiver reduces the complexity of circuit implementation, and because of these advantages of IR - UWB has always been a hot research topic in the UWB technology. In this paper, the IR - UWB transmitters of human vital signs detection in radar application study, for millimeter radar resolution requirements put forward the corresponding implementation scheme. In IR - UWB transmitters to achieve two major difficulties: frequency hopping communication and pulse shaping, this paper will research and solution is given. In this paper, through the adoption of a single phase lock loop (PLL) to quickly switch between the carrier frequency, for IR - UWB transmitter carrier signal with high frequency precision and implement in low subband UWB spectrum of frequency hopping communication. In order to avoid the PLL circuit chip area, power consumption, higher shortcomings, this paper proposes the digital implementation and innovative IR - UWB transmitter, the transmitter clock signal generation, enlarge the plastic pulse by digital unit implementation process in the library standards, Numbers of static logic unit consumes only a switch action and power dissipation caused by leakage current, and relative to the PLL chip area is greatly reduced. The proposed fast lock in PLL circuit and digital IR - UWB transmitters are TSMC65nm validation dirty piece of CMOS process.

Publications

Papers：：

[1] Xican Chen,Yiyu Shen,Zhicheng Wang,Woogeun Rhee,Zhihua Wang, A 17 mW 3-to-5 GHz Duty-Cycled Vital Sign Detection Radar Transceiver With Frequency Hopping and Time-Domain Oversampling, IEEE Transactions on Circuits and Systems I: Regular Papers, Vol.64, No.4, pp. 969 - 980, 2017.

[2] Yu Li,Fei Chen,Dang Liu,Xiaoyong Li,Yang Li,Yudong Zhang,Zhicheng Wang,Woogeun Rhee,Zhihua Wang, A 1.6Mb/s 3.75–4.25GHz chirp-UWB transceiver with enhanced spectral efficiency in 0.18μm CMOS, RFIT 2014, pp. 1 – 3, 2014.

[3] Zhicheng Wang,Xican Chen,Yiyu Shen,Woogeun Rhee,Zhihua Wang, A 2.5–4.5 GHz CMOS fast settling PLL for IR-UWB radar applications, ICSICT 2014, pp. 1 - 3, 2014.

[4] Zhicheng Wang,Xican Chen,Yiyu Shen,Woogeun Rhee,Zhihua Wang, A 3.1–4.8-GHz delay-line-based frequency-hopping IR-UWB transmitter in 65-NM CMOS technology, ICSICT 2014, pp. 1 - 3, 2014.