基于Web的选课系统受到上机条件和时间的限制,短信猫(GSM Modem)通过GSM网络进行数据的发送和接收。采用C#语言和Visual Studio 2008作为开发工具和平台,设计和开发一种基于短信猫的选课辅助系统,具有方便性、廉价性、移动性等特点。系...基于Web的选课系统受到上机条件和时间的限制,短信猫(GSM Modem)通过GSM网络进行数据的发送和接收。采用C#语言和Visual Studio 2008作为开发工具和平台,设计和开发一种基于短信猫的选课辅助系统,具有方便性、廉价性、移动性等特点。系统很好地弥补了Web选课系统的不足,实现两条信息渠道优势互补,增加选课系统的灵活性,在实践应用中取得很好的效果。展开更多
In the study and implementation of a programmable RS codec module in satellite communication modem, FPGA is used as the kernel in the implementation, while some ASICs are used as necessary assistant measures. The modu...In the study and implementation of a programmable RS codec module in satellite communication modem, FPGA is used as the kernel in the implementation, while some ASICs are used as necessary assistant measures. The module includes the RS codec unit, the interleaver and deinterleaver unit, the scrambler and descrambler unit and the frame synchronization unit. The module is realized successfully and it can be programmed on-line to meet the requirements of IESS 308/309/310 including many specifications about different service types and data rates. With the implementation combining FPGA with ASICs, size of the circuit is much reduced, its flexibility dramatically increased, and its stability further strengthened. Furthermore, the module is based on the software radio concept and can be easily integrated into the whole satellite communication modem.展开更多
文摘基于Web的选课系统受到上机条件和时间的限制,短信猫(GSM Modem)通过GSM网络进行数据的发送和接收。采用C#语言和Visual Studio 2008作为开发工具和平台,设计和开发一种基于短信猫的选课辅助系统,具有方便性、廉价性、移动性等特点。系统很好地弥补了Web选课系统的不足,实现两条信息渠道优势互补,增加选课系统的灵活性,在实践应用中取得很好的效果。
文摘In the study and implementation of a programmable RS codec module in satellite communication modem, FPGA is used as the kernel in the implementation, while some ASICs are used as necessary assistant measures. The module includes the RS codec unit, the interleaver and deinterleaver unit, the scrambler and descrambler unit and the frame synchronization unit. The module is realized successfully and it can be programmed on-line to meet the requirements of IESS 308/309/310 including many specifications about different service types and data rates. With the implementation combining FPGA with ASICs, size of the circuit is much reduced, its flexibility dramatically increased, and its stability further strengthened. Furthermore, the module is based on the software radio concept and can be easily integrated into the whole satellite communication modem.
