UC知道毕业设计翻译 关于GPS求助
来源：百度知道 编辑：UC知道 时间：2024/05/13 07:38:45
FPGA Frequency Domain Based GPS Coarse Acquisition Processor Using FFT
Cyprian Sajabi and Chien-In Henry Chen1, David M. Lin and James B. Y. Tsui 2
1
Department of Electrical Engineering, Wright State University, Dayton, OHIO, 45387
2 RF Technology Division, Sensors Directorate, Air Force Research Lab, Wright Patterson AFB, OHIO, 45433
Abstract — In this paper we describe the use of the FFT on an FPGA to perform lock on coarse acquisition (C/A) code and carrier frequency in a global positioning system (GPS) receiver. A novel technique of sub-sampling is used in this system to obtain data block sizes that match hardware limitations. The system uses 10 ms of data to perform the lock with 6 ms of processing time and theoretically can operate on signals 20 db below the noise floor.
Keywords – coarse acquisition (C/A) code, fast Fourier transform
(FFT), inverse fft (IFFT), disc
Cyprian Sajabi and Chien-In Henry Chen1, David M. Lin and James B. Y. Tsui 2
1
Department of Electrical Engineering, Wright State University, Dayton, OHIO, 45387
2 RF Technology Division, Sensors Directorate, Air Force Research Lab, Wright Patterson AFB, OHIO, 45433
Abstract — In this paper we describe the use of the FFT on an FPGA to perform lock on coarse acquisition (C/A) code and carrier frequency in a global positioning system (GPS) receiver. A novel technique of sub-sampling is used in this system to obtain data block sizes that match hardware limitations. The system uses 10 ms of data to perform the lock with 6 ms of processing time and theoretically can operate on signals 20 db below the noise floor.
Keywords – coarse acquisition (C/A) code, fast Fourier transform
(FFT), inverse fft (IFFT), disc
全球定位系统为基础的FPGA频域的FFT塞浦路斯sajabi用粗采集处理器及建于亨利臣 苏乙大卫尚明、翠玉21电机系,赖特州立大学、俄亥俄州代顿 453872射频科技部、传感器首长、空军研究实验室、抗酸赖特帕特森俄亥俄州 45433摘要-本文描述了使用的FFT的FPGA的演出锁定 粗采集(三/一)、载频码在全球定位系统(GPS)接收机. 新型技术小组采用这一系统采样数据块大小,硬件匹配的局限性. 该系统采用了10余条数据进行处理锁60余次,并从理论上可以 经营信号地上噪音低于20分贝. 关键词-粗采集(三/一)典、快速傅立叶变换(FFT),FFT的逆(逆),离散傅立叶变换(DFT)的FPGA、定位、 信噪比比率(收盘/氮). 导言GPS卫星导航数据传送用的就是接收机的位置来计算. 导航数据调制或"传播"由粗采集(三/一)典 这是一个伪噪声(PN)支持二进制序列,如图1. 航行数据带宽达到50赫兹,而三/一码是2.046兆赫带宽. 散布一种信号由窄带调制码称为扩频技术. 增加带宽为代价, 扩频传输提供更有保障的福利,例如多用户的通信信号频率相同. 在许多情况下,定位球,以低于20分贝的噪音楼 所以不是100余数据往往需要 接管过程可能要取得10余数据信号[1]. 这一规定提取的特殊挑战,并期于接到信号传送信息. 如果收购未遂 计算所需的时间相当大.