介绍了两种差分 G PS定位模型 ,它们是码差分定位和 RTK ( real tim e kinem atic)定位 ,讨论了多径效应对码差分定位和 RTK定位精度的影响。利用 Javad G80采集数据 ,最后通过分析这些数据的统计特性 ,得到的计算结果表明 :影响差分 GP...介绍了两种差分 G PS定位模型 ,它们是码差分定位和 RTK ( real tim e kinem atic)定位 ,讨论了多径效应对码差分定位和 RTK定位精度的影响。利用 Javad G80采集数据 ,最后通过分析这些数据的统计特性 ,得到的计算结果表明 :影响差分 GPS定位系统精度的主要原因是多径效应和接收机噪声。展开更多
Based on the equivalent circuit model of a two-port optical receiver front-end,the relationship between the equivalent input noise current spectral density and the noise figure is analyzed. The derived relationship ha...Based on the equivalent circuit model of a two-port optical receiver front-end,the relationship between the equivalent input noise current spectral density and the noise figure is analyzed. The derived relationship has universal validity for determining the equivalent input noise current spectral density for optical receiver designs, as verified by measuring a 155Mb/s high-impedance optical receiver front.end. Good agreement between calculated and simulated results has been achieved.展开更多
A sensitivity design method for a CMOS optoelectronic integrated circuit （OEIC） receiver is reported. The receiver consists of a regulated cascade （RGC） transimpedance amplifier （TIA） and a double photodiode （...A sensitivity design method for a CMOS optoelectronic integrated circuit （OEIC） receiver is reported. The receiver consists of a regulated cascade （RGC） transimpedance amplifier （TIA） and a double photodiode （DPD） detector. The noise and sensitivity of the receiver are analyzed in detail. The noise mainly comes from the thermal noise of resistors and the flicker noise of MOSFETs. The relationship between noise and receiver sensitivity is presented. The sensitivity design method for the receiver is given by a set of equations. The OEIC receiver was implemented in a CSMC 0.6μm standard CMOS process. The measured eye diagram shows that the CMOS OEIC receiver is able to work at bit rates of up to 1.25GB/s and the sensitivity is - 12dBm.展开更多
文摘介绍了两种差分 G PS定位模型 ,它们是码差分定位和 RTK ( real tim e kinem atic)定位 ,讨论了多径效应对码差分定位和 RTK定位精度的影响。利用 Javad G80采集数据 ,最后通过分析这些数据的统计特性 ,得到的计算结果表明 :影响差分 GPS定位系统精度的主要原因是多径效应和接收机噪声。
文摘Based on the equivalent circuit model of a two-port optical receiver front-end,the relationship between the equivalent input noise current spectral density and the noise figure is analyzed. The derived relationship has universal validity for determining the equivalent input noise current spectral density for optical receiver designs, as verified by measuring a 155Mb/s high-impedance optical receiver front.end. Good agreement between calculated and simulated results has been achieved.
文摘A sensitivity design method for a CMOS optoelectronic integrated circuit （OEIC） receiver is reported. The receiver consists of a regulated cascade （RGC） transimpedance amplifier （TIA） and a double photodiode （DPD） detector. The noise and sensitivity of the receiver are analyzed in detail. The noise mainly comes from the thermal noise of resistors and the flicker noise of MOSFETs. The relationship between noise and receiver sensitivity is presented. The sensitivity design method for the receiver is given by a set of equations. The OEIC receiver was implemented in a CSMC 0.6μm standard CMOS process. The measured eye diagram shows that the CMOS OEIC receiver is able to work at bit rates of up to 1.25GB/s and the sensitivity is - 12dBm.
