摘要：蓝牙5.0协议为长距离通信而新增加了LE coded PHY。在LE coded PHY中引入了FEC编解码以及Pattern Mapper和Demapper部分。如何利用这些新增的部分,来设计接收电路,从而支持更远的通信距离,是一个需要迫切研究的课题。提出一种适合蓝牙LE coded PHY的接收电路设计。仿真结果显示,当ADC输出的SNR为6 dB时,接收机的误帧率约为20%。

摘要：随着软件业的发展,市场上几乎所有的软件包含了图形用户界面(GUI)操作,GUI测试必然成为软件质量保证的重要部分。为了提高测试的效率和可靠性,GUI自动化测试受到越来越多的关注。在VS2010 coded UI Test自动化测试工具的基础上,设计实现了的GUI自动化测试平台。使用该平台可以提高测试覆盖率、降低回归测试成本,为软件质量提供保证。

摘要：A novel kind of multidimension symbol/sequence trellis coded modulation (TCM) based on TCM of lower coding rate has been constructed. The redundancy of this new kind of TCM is provided not only by the modulated symbol sequence but also by the PN sequences for spreading spectrum as well. The performance of direct sequence spread spectrum multiple access (DS/SSMA) system with this symbol/sequence TCM over flat Rayleigh fading channel has been investigated by theoretical analysis and numerical simulation. The results obtained in this research demonstrate the performance improvements of this system in comparison with that of the DS/SSMA system with conventional TCM under the same conditions.