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
轨道交通基础设施巡检机器人进行病害巡检作业时,应满足精确定位需求。这里采用基于时间到达(Time of Arrive,TOA)的超宽带(Ultra Wide Band,UWB)定位方法,提出了一种基于轨道约束的级联定位算法,通过最小二乘法获得机器人估计位置并作...轨道交通基础设施巡检机器人进行病害巡检作业时,应满足精确定位需求。这里采用基于时间到达(Time of Arrive,TOA)的超宽带(Ultra Wide Band,UWB)定位方法,提出了一种基于轨道约束的级联定位算法,通过最小二乘法获得机器人估计位置并作为初始值,用轨道约束条件对定位误差进行Taylor展开,迭代求解出精确位置。仿真分析显示,应用基于轨道约束的UWB定位算法,巡检机器人在视距环境下定位精度可达10cm。通过地铁轨道区间的典型应用场景验证,巡检机器人定点及连续运动的定位精度优于20cm,可面向轨道交通巡检机器人的定位工程应用。展开更多
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.
文摘轨道交通基础设施巡检机器人进行病害巡检作业时,应满足精确定位需求。这里采用基于时间到达(Time of Arrive,TOA)的超宽带(Ultra Wide Band,UWB)定位方法,提出了一种基于轨道约束的级联定位算法,通过最小二乘法获得机器人估计位置并作为初始值,用轨道约束条件对定位误差进行Taylor展开,迭代求解出精确位置。仿真分析显示,应用基于轨道约束的UWB定位算法,巡检机器人在视距环境下定位精度可达10cm。通过地铁轨道区间的典型应用场景验证,巡检机器人定点及连续运动的定位精度优于20cm,可面向轨道交通巡检机器人的定位工程应用。
