使用borland公司的delphi语言,编程实现CTI交换机坐席之间的互拨的功能。delphi语言完成语音板卡的设置, 应用程序接口API,七号信令的配置...

NRF2401无线模块，STM32程序实现了数据双向通信.它分为接收和发送两部分，发送时发送的源程序，接收是接收的源程序，分别设置了俩个文件夹。nrf24l01在stm32的模块上，通过spi接口连接，实行通信，最终实现两块单独的stm32模块实现短距离的无线通信，速度高，功耗小。

可靠性和有效性是数字通信系统的两大性能指标。然而,在数字通信系统中,二者往往是一对矛盾,在频带资源日益紧张的当代,如何在保证一定通信可靠性的前提下尽可能提高有效性是通信领域永恒的主题。在光通信系统中,接收机在进行相位恢复时必须设法克服相位模糊问题,为此,常常采用差分调制(DQPSK)。然而,差分调制会导致信号误码率加倍,产生额外的信噪比代价。本文分析了迭代差分解调译码方案,即将LDPC编码和差分调制作为整体进行优化。仿真结果表明,该方案既可以克服相位模糊又能补偿差分代价,增强了系统的可靠性。同时,本文分析了适合该方案的LDPC码的度优化算法和满足任意度分布的校验矩阵的构造方法。在无线通信系统中,无线信道的衰落特性严重影响通信传输的有效性与可靠性。分集技术是一种典型的抗衰落技术,本文研究了联合编码调制分集技术,对该技术的两个关键因素：多维旋转调制和分量交织器的设计进行了重点研究,使得该技术更好地将信道编码增益与时间、频率、空间和调制分集相结合,使系统达到很高的频谱效率,有效地抵抗衰落信道下的各种干扰,增强了整个通信系统的有效性与可靠性。

sip协议的中文版本，对通信开发很有帮助。-sip the Chinese version of the agreement on the development of useful communication.

信号采集器，油,水,气的采集-Signal acquisition device, oil, water, gas collection

fifty years of coding theory，一篇经典的讲述纠错编码的IEEE文档，适合纠错编码读者阅读。里面详细讲述的纠错编码的发展史，包括BCH、RS、卷积码、Turbo码等编码-fifty years of coding theory, a classical error-correcting code on the IEEE document, suitable for error-correcting code readers. Which describe in detail the history of the development of error correction coding, including BCH, RS, convolutional codes, Turbo codes encoding

ultrawidebad file is there

这是一个串口源码-the Serialport Code

ROC curves illustrate performance on a binary classification problem where classification is based on simply thresholding a set of scores at varying levels. Lenient thresholds give high sensitivity but low specificity, strict thresholds give high specificity but low sensitivity the ROC curve plots this trade-off over a range of thresholds (usually with sens vs 1-spec, but I prefer sens vs spec this code gives you the option). It is theoretically possible to operate anywhere on the convex hull of an ROC curve, so this is plotted too. The area under the curve (AUC) for a ROC plot is a measure of overall accuracy, and the area under the ROCCH is a kind of upper bound on what might be achievable with a weighted combination of differently thresholded results from the given classifier -ROC curves illustrate performance on a binary classification problem where classification is based on simply thresholding a set of scores at varying levels. Lenient thresholds give high sensitivity but

nothing to say! It is only the necessar file to be enabled to download other important file for my studies.

S3C2410 连同三星TFTLCD触摸屏控制实验-Together with the Samsung S3C2410 touchscreen control experiment TFTLCD