Location：Home > Students > Past students
Lingwei Zhang

Biography

Enrollment Date: 2007

Graduation Date：2013

Degree：Ph.D.

Defense Date：2013.05.30

Advisors：Zhihua Wang Hanjun Jiang

Department：Institute of Microelectronics，Tsinghua University

Title of Dissertation/Thesis：Design Technology of Multi-Band Multi-Mode Tranceiver for Wireless Healthcare System

Abstract:
The wireless healthcare system is consist of the remote service center, the local portable control station and multiple sensor nodes; it has the functions of long-term acquisition and monitoring of human physiological signals and interventional treatment. The purpose of this dissertation is to design the low-power multi-band multi-mode transceiver for the control station of the system. By analyzing the different application requirements of the sensor nodes, the dissertation figures out that the transceiver should be compatible with 400 MHz and 2.4 GHz frequency bands, the data bandwidth can be configured from 150 kHz to 3 MHz and other design specifications must meet the physical layer requirements of the IEEE 802.15.6, the IEEE 802.15.4 and the custom communication protocol. This dissertation proposes a reconfigurable sliding-IF transceiver architecture. The transceiver can be reconfigured to the direct conversion architecture or the sliding-IF architecture when it is working in different bands. Involving the proposed architecture in stead of the classic quadrature architecture to cover the desired frequency bands, the frequency synthesizer tuning range and highest frequency were reduced by 75% and 60%, respectively. In the receiver chapter, the dissertation focuses on the broadbanding and the low-power technologies of the low noise amplifier design. By modifying the parallel active feedback low noise amplifier, the noise optimization can be independent of the matching requirements, and the broadband matching performance is non-correlated to the amplifier’s gain controlling. Low noise amplifier also uses the multi transconductance enhancement and power supply compression technologies. In addition, the dissertation also describes the reconfiguration method of the down-converters between the two architectures, as well as the low voltage, low noise and large output swing design methods of the low-frequency mixer. The dissertation presents a fast DC offset calibration method removing the analog IF circuits’ gain-correlated offset residual. The circuit implementation of the proposed method is also presented. The proposed method saves the calibration time and hardware. In the transmitter, the reconfiguration method of the frequency conversion is different from the one in the receiver. The dissertation presents a detailed study of the design difficulties--the high-frequency quadrature LO signal generation. It also describes the technology of the reconfigurable power amplifier which can optimize the output power and efficiency of when the transmitter in different modulation modes. Based on the above architecture, techniques and methods, the dissertation designs a transceiver which meets the specifications of the low-power multi-band multi-mode transceiver in the control station of the wireless healthcare system. The transceiver is implemented in 0.18 m CMOS process. The receiver sensitivity is about -90 dBm for 10-3 BER in the 400 MHz band 3Mbsp MSK communication and is -99 dBm in the 2.4 GHz band under the IEEE 802.15.4 protocol defined sensitivity test conditions. The maximum transmit power in the 400 MHz and 2.4 GHz band are +4.7 dBm and +3.1 dBm, while the efficiency of the power amplifier are 40% and 31%, respectively. When transmit the IEEE 802.15.4 signal, the EVM of modulated signal is about 8% . The relative frequency tuning range of the synthesizer is only 21%, which is significantly less than it in the classic quadrature architecture of the broadband solutions. Detailed measurement results show that the receiver figure of merit is better than the reported broadband transceivers and the single-band WBAN transceivers or the IEEE 802.15.4 transceivers; and the transmitter figure of merit is comparable to those reported transceivers.

Publications

Papers：：

[1] Jingjing Dong,Hanjun Jiang,Lingwei Zhang,Jianjun Wei,Fule Li,Chun Zhang,ZhiHua Wang, A low-power DC offset calibration method independent of IF gain for zero-IF receiver, Science China-Information Sciences, Vol.57, No.10, pp 1 - 10, 2014.

[2] Jianjun Wei,Hanjun Jiang,Lingwei Zhang,Jinjin Dong,Fule Li,Zhihua Wang,Chun Zhang, A wide range sigma-delta fractional-N frequency synthesizer with adaptive frequency calibration, Journal of Semiconductors, Vol.34, No.6, pp. 065002-1-5, 2013.

[3] Lingwei Zhang,Baoyong Chi,Nan Qi,Liyuan Liu,Hanjun Jiang,Zhihua Wang, A Lower Power Reconfigurable Multi-Band Transceiver for Short-Range Communication, Journal of Semiconductors, Vol.34, No.3, pp. 035008-1-7 , 2013.

[4] Nan Qi,Fan Chen,Lingwei Zhang,Xiaoman Wang,Baoyong Chi, A Reconfigurable Multi-Mode Multi-band Transmitter with Integrated Frequency Synthesizer for Short-Range Wireless Communication, Journal of Semiconductors, Vol.34, No.9, pp. 095008-1-7, 2013.

[5] Lingwei Zhang,Hanjun Jiang,Jianjun Wei,Jingjing Dong,Fule Li,Weitao Li,Jia Gao,Jianwei Cui,Baoyong Chi, Chun Zhang, Zhihua Wang, A Reconfigurable Sliding-IF Transceiver for 400 MHz/2.4 GHz IEEE 802.15.6/ZigBee WBAN Hubs With Only 21% Tuning Range VCO, IEEE Journal of Solid-State Circuits, Vol.48, No.11, pp. 2705 - 2716, 2013.

[6] Lingwei Zhang,Hanjun Jiang,Fule Li,Jingjing Dong,Jianwei Cui,Zhihua Wang, DC offset calibration method for zero-IF receiver removing the PGA-gain-correlated offset residue, AEU-International Journal of Electronics and Communications, Vol.67, No.7, pp. 578 - 584, 2013.

[7] Zhihua Wang,Hanjun Jiang,Kai Yang,Lingwei Zhang,Jianjun Wei,Fule Li,Baoyong Chi,Chun Zhang,Shouhao Wu, Qingliang Lin, Wen Jia, Lifetime Tracing of Cardiopulmonary Sounds with Ultra-Low-Power Sound Sensor Stick Connected to Wireless Mobile Network, NEWCAS 2013, pp. 1 - 4, 2013.

[8] Lingwei Zhang,Hanjun Jiang,Fule Li,Jingjing Dong,Zhihua Wang, A LUT-free DC Offset Calibration Method for removing the PGA-gain-correlated Offset Residue, ISCAS 2013, pp. 1704 - 1707, 2013.

[9] Baoyong Chi,Xiaoman Wang,Lingwei Zhang,Songyuan Cheng,Zhihua Wang, A 1.8-V, 5-mA reconfigurable analog baseband circuit for low-IF multi-mode multi-band receivers, International Journal of Electronics, Vol.99, No.5, pp. 695 - 705, 2012.

[10] Jia Gao,Hanjun Jiang,Lingwei Zhang,Jingjing Dong,Zhihua Wang, A Programmable Low-Pass Filter with Adaptive Miller Compensation for Zero-IF Transceiver, MWSCAS 2012, pp. 226 - 229, 2012.

[11] Lingwei Zhang,Hanjun Jiang,Jianjun Wei,Jingjing Dong,Weitao Li,Jia Gao,Jianwei Cui,Fule Li,Baoyong Chi, Chun Zhang, Zhihua Wang, A low-power reconfigurable multi-band sliding-IF transceiver for WBAN Hubs in 0.18μm CMOS, A-SSCC 2012, pp. 77 - 80, 2012.

[12] Xiaoyu Zhang,Hanjun Jiang,Songyuan Cheng,Lingwei Zhang,Fule Li,Chun Zhang,Zhihua Wang, A High-Efficiency Work-on-Demand SoC with a 0.9V/165 mu W MCU and Dual-Band RF for WBSN, Chinese Journal of Electronics, Vol.20, No.1, pp. 21 - 26, 2011.

[13] Xiaoyu Zhang,Hanjun Jiang,Songyuan Cheng,Lingwei Zhang,Fule Li,Chun Zhang,Zhihua Wang, A High-Efficiency Work-on-Demand SoC with a 0.9V/165μW MCU and Dual-Band RF for WBSN, Chinese Journal of Electronics, pp. 1 - 4, 2010.

[14] Zhihua Wang,Xiaoyu Zhang,Lingwei Zhang,Chun Zhang,Songping Mai,Xiang Xie,Hanjun Jiang,Baoyong Chi, China Integrated Circuit, No.2, pp. 12 - 23, 2010.

[15] Xiaoyu Zhang,Hanjun Jiang,Lingwei Zhang,Xinkai Chen,Chun Zhang,Zhihua Wang, An Energy-Efficient ASIC for Wireless Body Sensor Networks in Medical Applications, IEEE Transactions on Biomedical Circuits and Systems, Vol.4, No.1, pp. 11 - 18, 2010.

[16] Ran Yu,Hanjun Jiang,Lingwei Zhang,Chun Zhang,Zhihua Wang, A hybrid regulator with boost charge pump and low-dropout linear regulation, ICSICT 2010, pp. 587 - 589, 2010.

[17] Xinkai Chen,Xiaoyu Zhang,Lingwei Zhang,Xiaowen Li,Nan Qi,Hanjun Jiang,Zhihua Wang, A Wireless Capsule Endoscope System with Low-Power Controlling and Processing ASIC, IEEE Transactions on Biomedical Circuits and Systems, Vol.3, No.1, pp. 11 - 22, 2009.

[18] Xiaoyu Zhang,Hanjun Jiang,Xinkai Chen,Lingwei Zhang,Zhihua Wang, An Energy Efficient Implementation of On-Demand MAC Protocol in Medical Wireless Body Sensor Networks, ISCAS 2009, pp. 3094 - 3097, 2009.

[19] Hanjun Jiang,Lingwei Zhang,Chun Zhang,Zhihua Wang, Wireless Switch for Implantable Medical Devices Based on Passive RF Receiver, Electronics Letters, Vol.44, No.17, pp. 1006 - 1008, 2008.

[20] Xueyi Yu,Guolin Li,Lingwei Zhang,Zhihua Wang, Design and test of a miniature 2.45 GHz antenna for implantable medical devices, IMS3TW 2008, pp. 1 - 5, 2008.

[21] Zhihua Wang,Xiaoyu Zhang,Xinkai Chen,Lingwei Zhang,Hanjun Jiang, An energy-efficient ASIC with real-time work-on-demand for wireless body sensor network, EDSSC 2008, pp. 1 - 6, 2008.

[22] Lingwei Zhang,Hanjun Jiang,Xuguang Sun,Chun Zhang,Zhihua Wang, A Passive RF Receiving and Power Switch ASIC for Remote Power Control with Zero Stand-by Power, A-SSCC 2008, pp. 109 - 112, 2008.

[23] Xinkai Chen,Xiaoyu Zhang,Lingwei Zhang,Nan Qi,Hanjun Jiang,Zhihua Wang, A Wireless Capsule Endoscopic System with a Low-Power Controlling and Processing ASIC, A-SSCC 2008, pp. 321 - 324, 2008.