This paper introduces a novel digital transceiver for the cordless telephone zero （CT0） standard,which uses a digital modulation and demodulation technique to handle the signal instead of the traditional analog meth...This paper introduces a novel digital transceiver for the cordless telephone zero （CT0） standard,which uses a digital modulation and demodulation technique to handle the signal instead of the traditional analog meth-od. In the transmitter,a fractional-N phase locked loop （PLL） is utilized to realize the continuous phase frequency shift key （CPFSK） modulation,and a 2 Ts raised cosine （2RC） shaping technique is used to reduce the occupied bandwidth. In the receiver,a novel digital method is proposed to demodulate the 2RC CPFSK signal. This chip is fabricated using an SMIC 0.35μm mixed signal CMOS process with a die size of 2mm × 2mm. With an external low noise amplifier （LNA）,the sensitivity of the chip is better than -103dBm.展开更多
依据欧洲电信标准协会(ETSI)提出的ETSI EN 300 401标准,设计了一种高性能DAB接收终端RF接收模块的设计方法,实现了DAB信号稳定同步和接收,达到了高灵敏度和低功耗,在移动速度达到200 km/h时能够稳定接收。该设计方法已经用于批量生产的...依据欧洲电信标准协会(ETSI)提出的ETSI EN 300 401标准,设计了一种高性能DAB接收终端RF接收模块的设计方法,实现了DAB信号稳定同步和接收,达到了高灵敏度和低功耗,在移动速度达到200 km/h时能够稳定接收。该设计方法已经用于批量生产的DAB接收终端中。展开更多
目前室内定位方法易受外界干扰、成本高、测量距离短、稳定性差,为此该文提出了一种基于RFID(Radio Frequency IDentification)的室内定位硬件系统。该系统基于RFID思想,以PC机、MSP430系列单片机、cc系列芯片模块软件等作为辅助工具进...目前室内定位方法易受外界干扰、成本高、测量距离短、稳定性差,为此该文提出了一种基于RFID(Radio Frequency IDentification)的室内定位硬件系统。该系统基于RFID思想,以PC机、MSP430系列单片机、cc系列芯片模块软件等作为辅助工具进行设计。该系统能够在实验室环境下实现对室内物体的定位信息的获取以及进行穿过障碍物获取数据的功能。实验结果表明,设计的系统可以获取到包含室内物体位置信息的信号强度指示,并且得到其曲线关系图。展开更多
This paper presents a first monolithic RF transceiver for DC-OFDM UWB applications.The proposed direct-conversion transceiver integrates all the building blocks including two receiver（Rx） cores,two transmitter （Tx...This paper presents a first monolithic RF transceiver for DC-OFDM UWB applications.The proposed direct-conversion transceiver integrates all the building blocks including two receiver（Rx） cores,two transmitter （Tx） cores and a dual-carrier frequency synthesizer（DC-FS） as well as a 3-wire serial peripheral interface（SPI） to set the operating status of the transceiver.The ESD-protected chip is fabricated by a TSMC 0.13-μm RF CMOS process with a die size of 4.5 x 3.6 mm2.The measurement results show that the wideband Rx achieves an NF of 5-6.2 dB,a max gain of 76-84 dB with 64-dB variable gain,an in-/out-of-band IIP3 of-6/＋4 dBm and an input loss S11 of〈-10 in all bands.The Tx achieves an LOLRR/IMGRR of-34/-33 dBc,a typical OIP3 of＋6 dBm and a maximum output power of -5 dBm.The DC-FS outputs two separate carriers simultaneously with an inter-band hopping time of〈1.2 ns.The full chip consumes a maximum current of 420 mA under a 1.2-V supply.展开更多
A 2.4 GHz ultra-low-power RF transceiver with a 900 MHz auxiliary wake-up link for wireless body area networks（WBANs）in medical applications is presented.The RF transceiver with an asymmetric architecture is propose...A 2.4 GHz ultra-low-power RF transceiver with a 900 MHz auxiliary wake-up link for wireless body area networks（WBANs）in medical applications is presented.The RF transceiver with an asymmetric architecture is proposed to achieve high energy efficiency according to the asymmetric communication in WBANs.The transceiver consists of a main receiver（RX）with an ultra-low-power free-running ring oscillator and a high speed main transmitter（TX）with fast lock-in PLL.A passive wake-up receiver（WuRx）for wake-up function with a high power conversion efficiency（PCE）CMOS rectifier is designed to offer the sensor node the capability of work-on-demand with zero standby power.The chip is implemented in a 0.18μm CMOS process.Its core area is 1.6 mm^2. The main RX achieves a sensitivity of-55 dBm at a 100 kbps OOK data rate while consuming just 210μA current from the 1 V power supply.The main TX achieves ＋3 dBm output power with a 4 Mbps/500 kbps/200 kbps data rate for OOK/4 FSK/2 FSK modulation and dissipates 3.25 mA/6.5 mA/6.5 mA current from a 1.8 V power supply. The minimum detectable RF input energy for the wake-up RX is-15 dBm and the PCE is more than 25%.展开更多
文摘This paper introduces a novel digital transceiver for the cordless telephone zero （CT0） standard,which uses a digital modulation and demodulation technique to handle the signal instead of the traditional analog meth-od. In the transmitter,a fractional-N phase locked loop （PLL） is utilized to realize the continuous phase frequency shift key （CPFSK） modulation,and a 2 Ts raised cosine （2RC） shaping technique is used to reduce the occupied bandwidth. In the receiver,a novel digital method is proposed to demodulate the 2RC CPFSK signal. This chip is fabricated using an SMIC 0.35μm mixed signal CMOS process with a die size of 2mm × 2mm. With an external low noise amplifier （LNA）,the sensitivity of the chip is better than -103dBm.
文摘目前室内定位方法易受外界干扰、成本高、测量距离短、稳定性差,为此该文提出了一种基于RFID(Radio Frequency IDentification)的室内定位硬件系统。该系统基于RFID思想,以PC机、MSP430系列单片机、cc系列芯片模块软件等作为辅助工具进行设计。该系统能够在实验室环境下实现对室内物体的定位信息的获取以及进行穿过障碍物获取数据的功能。实验结果表明,设计的系统可以获取到包含室内物体位置信息的信号强度指示,并且得到其曲线关系图。
基金supported by the National Science & Technology Major Projects of China(No.2009ZX03006-007-01)the National High Technology R&D Program of China(No.2009AA01 Z261)
文摘This paper presents a first monolithic RF transceiver for DC-OFDM UWB applications.The proposed direct-conversion transceiver integrates all the building blocks including two receiver（Rx） cores,two transmitter （Tx） cores and a dual-carrier frequency synthesizer（DC-FS） as well as a 3-wire serial peripheral interface（SPI） to set the operating status of the transceiver.The ESD-protected chip is fabricated by a TSMC 0.13-μm RF CMOS process with a die size of 4.5 x 3.6 mm2.The measurement results show that the wideband Rx achieves an NF of 5-6.2 dB,a max gain of 76-84 dB with 64-dB variable gain,an in-/out-of-band IIP3 of-6/＋4 dBm and an input loss S11 of〈-10 in all bands.The Tx achieves an LOLRR/IMGRR of-34/-33 dBc,a typical OIP3 of＋6 dBm and a maximum output power of -5 dBm.The DC-FS outputs two separate carriers simultaneously with an inter-band hopping time of〈1.2 ns.The full chip consumes a maximum current of 420 mA under a 1.2-V supply.
基金Project supported by the National High-Tech Research and Development Program of China(Nos2008AA010703,2009AA011606)the National Natural Science Foundation of China(No60976023)
文摘A 2.4 GHz ultra-low-power RF transceiver with a 900 MHz auxiliary wake-up link for wireless body area networks（WBANs）in medical applications is presented.The RF transceiver with an asymmetric architecture is proposed to achieve high energy efficiency according to the asymmetric communication in WBANs.The transceiver consists of a main receiver（RX）with an ultra-low-power free-running ring oscillator and a high speed main transmitter（TX）with fast lock-in PLL.A passive wake-up receiver（WuRx）for wake-up function with a high power conversion efficiency（PCE）CMOS rectifier is designed to offer the sensor node the capability of work-on-demand with zero standby power.The chip is implemented in a 0.18μm CMOS process.Its core area is 1.6 mm^2. The main RX achieves a sensitivity of-55 dBm at a 100 kbps OOK data rate while consuming just 210μA current from the 1 V power supply.The main TX achieves ＋3 dBm output power with a 4 Mbps/500 kbps/200 kbps data rate for OOK/4 FSK/2 FSK modulation and dissipates 3.25 mA/6.5 mA/6.5 mA current from a 1.8 V power supply. The minimum detectable RF input energy for the wake-up RX is-15 dBm and the PCE is more than 25%.
