该文介绍了仪表着陆系统(Instrument Landing System,ILS)和甚高频全向信标(Very High Frequency Omni directional Range,VOR)的航空导航系统中重要性,以及应用中的工作原理。通过设计原理进行方案设计,提出一种基于FPGA的地面信号发...该文介绍了仪表着陆系统(Instrument Landing System,ILS)和甚高频全向信标(Very High Frequency Omni directional Range,VOR)的航空导航系统中重要性,以及应用中的工作原理。通过设计原理进行方案设计,提出一种基于FPGA的地面信号发生技术,具有资源利用率高、配置灵活高效等特点,能够产生高精度LOC、GS、MB和VOR基带信号。最后进行了仿真实验,得到各种基带信号的波形图,验证了该技术的可靠和有效。展开更多
The primary goal of this project was educational: to demonstrate Software Defined Radio based prototyping using Visual C++ Express and Code Composer Studio. More specifically an IEEE802.11a Phy [1] compliant baseband ...The primary goal of this project was educational: to demonstrate Software Defined Radio based prototyping using Visual C++ Express and Code Composer Studio. More specifically an IEEE802.11a Phy [1] compliant baseband processor was written in C++ and a radio link demonstrated “live” using a standard PCand the DSK6713 kit from Spectrum Digital [2] for baseband processing at the receiver and transmitter side respectively. To reduce costs without loss of educational value (the algorithms remains the same), the bandwidth was scaled down from 20MHz to 6 kHz to be able to utilize cheap narrowband COTS RF frontends operating at an intermediate frequency of only 12 kHz at the transmitter and receiver sides. This was easily achieved by just reducing the OFDM symbol rate by a suitable factor. The development process is described in detail, emphasizing development tricks to facilitate debugging of this kind of complex baseband processing. For educational purposes some other simpler waveforms was implemented as well.展开更多
文摘该文介绍了仪表着陆系统(Instrument Landing System,ILS)和甚高频全向信标(Very High Frequency Omni directional Range,VOR)的航空导航系统中重要性,以及应用中的工作原理。通过设计原理进行方案设计,提出一种基于FPGA的地面信号发生技术,具有资源利用率高、配置灵活高效等特点,能够产生高精度LOC、GS、MB和VOR基带信号。最后进行了仿真实验,得到各种基带信号的波形图,验证了该技术的可靠和有效。
文摘The primary goal of this project was educational: to demonstrate Software Defined Radio based prototyping using Visual C++ Express and Code Composer Studio. More specifically an IEEE802.11a Phy [1] compliant baseband processor was written in C++ and a radio link demonstrated “live” using a standard PCand the DSK6713 kit from Spectrum Digital [2] for baseband processing at the receiver and transmitter side respectively. To reduce costs without loss of educational value (the algorithms remains the same), the bandwidth was scaled down from 20MHz to 6 kHz to be able to utilize cheap narrowband COTS RF frontends operating at an intermediate frequency of only 12 kHz at the transmitter and receiver sides. This was easily achieved by just reducing the OFDM symbol rate by a suitable factor. The development process is described in detail, emphasizing development tricks to facilitate debugging of this kind of complex baseband processing. For educational purposes some other simpler waveforms was implemented as well.
