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pcm
语音编码方案的选取对移动通信系统的通话质量、信道容量等有重要影响。本文讨论了TD-SCDMA系统中AMR语音编码的自适应机制，同时分析了AMR中代数码本线性预测(ACELP)算法及实现过程。该方案可以在一块TMS320C5510上实现。(The selection of voice coding schemes for mobile communication systems the quality of the call, such as channel capacity have had a significant impact. In this paper, TD-SCDMA System AMR Adaptive speech coding mechanism, at the same time analysis of AMR in the generation of Digital Linear Prediction (ACELP) algorithm and the realization of the process. The program can be achieved in a TMS320C5510.)
- 2009-04-27 22:26:09下载
- 积分：1
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S7-200ytjc
S7-200以太网通讯图文教程
S7-200通过CP243-1或 CP243_1IT接入工业以太网。
S7-200以太网通信主要有以下几种方式：
★ S7-200之间的以太网通信
★ S7-200与S7-300/400之间的以太网通信
★ S7-200与OPC及WINCC的以太网通信 (S7-200 Ethernet communication graphic tutorial
)
- 2011-12-16 15:05:21下载
- 积分：1
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CDMA-power-control-algorith
该文为CDMA移动通信功率控制算法的研究与仿真的本科毕业论文(In this paper, the CDMA mobile communication power control algorithm and simulation of undergraduate thesis)
- 2012-05-26 02:15:20下载
- 积分：1
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TCPIP-3
TCPIP协议详解卷三：事务TCPIP协议详解卷三：事务TCPIP协议详解卷三：事务(TCPIP protocol Xiangjie Makizo: Services TCPIP protocol Xiangjie Makizo: Services TCPIP protocol Xiangjie Makizo: Services)
- 2010-03-13 20:33:45下载
- 积分：1
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Research-on-Optimal-Coverage-Problem-of-Wireless-
optimal coverage problem of wireless sensor network
- 2013-07-10 13:38:21下载
- 积分：1
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一种基于高阶累积量的数字调相信号识别方法
说明： 对当前通信信号中常用的数字调相信号BPSK、QPSK、1／4一QPSK、8PSK的调制识别问题，提出了一种基于信号差分高阶累积量的识剐算法。该算法分两个层次进行调制识别，首先利用信号的四阶累积量特征对BPSK、QPSK和{1／4一QPSK、8PSK}信号进行识别，然后再利用信号差分的四阶和八阶累积量特征对1/4-QPSK、8PSK信号进行识别。从理论上分析了的该算法的有效性，并通过计算机仿真验证了算法具有良好的性能。(A recognition algorithm based on differential high-order cumulant is proposed for the modulation recognition problems of BPSK, QPSK, 1/4-QPSK and 8PSK, which are commonly used in current communication signals. The algorithm is divided into two levels for modulation recognition. Firstly, BPSK, QPSK and {1/4-QPSK, 8PSK} signals are identified by using the fourth-order cumulant characteristics of signals, and then 1/4-QPSK and 8PSK signals are identified by using the fourth-order cumulant and eighth-order cumulant characteristics of signal difference. The validity of the algorithm is analyzed theoretically, and the good performance of the algorithm is verified by computer simulation.)
- 2020-06-21 09:40:02下载
- 积分：1
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802.16标准
说明： 802.16E的协议文档，完整版本。其中包括3个版本。(802.16E protocol document, full version.)
- 2020-06-19 02:40:01下载
- 积分：1
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4850
利用matlab GUI实现的串口编程例子，独立成分分析算法降低原始数据噪声，构成不同频率的调制信号。( Use serial programming examples matlab GUI implementation, Independent component analysis algorithm reduces the raw data noise, Constituting the modulated signals of different frequencies.)
- 2017-05-08 17:17:11下载
- 积分：1
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PPT
扩频通信，即扩展频谱通信(Spread Spectrum Communication)，它与光纤通信、卫星通信，一同被誉为进入信息时代的三大高技术通信传输方式。
- 2011-12-15 20:30:31下载
- 积分：1
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Research-on-Optimal-Coverage-Problem-of-Wireless-
optimal coverage problem of wireless sensor network
- 2013-07-10 13:38:21下载
- 积分：1
