Description: VC写的用TAPI 2.0接口的拨号例子.该例子能够选择TAPI通道,然后通过该通道拨打指定号码,接通后,会播放"这时一个morning call,请起床的语音通知"-VC wrote TAPI 2.0 interface using dial-up examples. The examples to choose TAPI channel, and then through the channel dial the designated number, to connect, it will play when a morning call, please get up and voice notification Platform: |
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Author:Tang |
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Description: 笔者长期从事移动通信系统的无线链路调制与解调、物理层实现方面的工作。在移动通信GSM系统中，我们进行语音或者业务信道解调时，都会遇到CRC的求解。通常在硬件DSP实现时，特别是40位CRC求解时候，由于生成多项式有41项，DSP最大一次能处理40位，所以使用单个寄存器会遇到一些困难，那么以下这个程序将会解决这一困难（这是针对定点DSP、C55xx的编程实现方法）。-The author has long been engaged in mobile communication system modulation and demodulation of wireless links, the physical layer to achieve work. GSM in the mobile communications system, we have a voice or channel demodulation operations, it will encounter the solution of CRC. DSP hardware usually realize, especially when solving the 40 CRC, as the generation polynomial has 41, DSP can handle the largest 40, so using a single register may encounter some difficulties, then following this process will solve this One difficulty (which is for fixed-point DSP, C55xx realize programming methods). Platform: |
Size: 3072 |
Author:戴浩 |
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Description: 笔者长期从事移动通信系统的无线链路调制与解调物理层实现方面的工作，所以在这里我们给出语音或者业务信道链路过程的交织与解交织的DSP实现方法。需要说明的是：这是针对定点DSP、C55xx的编程实现方法，希望对读者有益。-The author has long been engaged in mobile communication systems wireless link physical layer modulation and demodulation realize the work, so here we give voice channel link or business process interwoven with deinterleave realize the DSP approach. It should be noted that: This is for fixed-point DSP, C55xx programming realize, and I hope that useful to readers. Platform: |
Size: 3072 |
Author:戴浩 |
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Description:
对于这个问题的实现、刚刚给过一个程序，突然想起另外一种简单一些的方法，一并给出[笔者长期从事移动通信系统的无线链路调制与解调、物理层实现方面的工作。在移动通信GSM系统中，我们进行语音或者业务信道解调时，都会遇到CRC的求解。通常在硬件DSP实现时，特别是40位CRC求解时候，由于生成多项式有41项，DSP最大一次能处理40位，所以使用单个寄存器会遇到一些困难，那么以下这个程序将会解决这一困难（这是针对定点DSP、C55xx的编程实现方法）。]：
-For the realization of this issue, just to have a program, suddenly reminded of another simpler way to be given [the author has long been engaged in mobile communication system modulation and demodulation of wireless links, the physical layer to achieve work. GSM in the mobile communications system, we have a voice or channel demodulation operations, it will encounter the solution of CRC. DSP hardware usually realize, especially when solving the 40 CRC, as the generation polynomial has 41, DSP can handle the largest 40, so using a single register may encounter some difficulties, then following this process will solve this One difficulty (which is for fixed-point DSP, C55xx realize programming methods). ]: Platform: |
Size: 3072 |
Author:戴浩 |
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Description: 语音编码为信源编码，是将模拟信号转变为数字信号，然后在信道中传输。在数字移动通信中，语音编码技术具有相当关键的作用，高质量低速率的话音编码技术与高效率数字调制技术相结合，可以为数字移动网提供高于模拟移动网的系统容量。目前，国际上语音编码技术的研究方向有两个：降低话音编码速率和提高话音质。-Speech coding for source coding is the analog signal into a digital signal, and then in the channel transmission. In digital mobile communication, speech coding technology has a key role high-quality low-rate voice coding technology and high efficiency digital modulation technology, digital mobile networks for the provision of mobile networks is higher than analog system capacity. At present, the international speech coding technology, there are two research directions: reduce the encoding rate and the advancement of voice, then sound quality. Platform: |
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Author:刘文 |
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Description: 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. Platform: |
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Author:刘文 |
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Description: The voice channel in mobile communication systems have high priority and are
almost always available. By using the voice channel also for data transmissions it
is possible to get the same availability as for voice calls. But due to speech codecs
in the voice channel, regular modems can not be used and special techniques are
needed to transmit data.
This thesis presents methods to transmit data over the voice channel in a GSM,
UMTS or TETRA network. The focus has been on robust data transmission rather
than high data bit rates. Approaches are introduced which improve the reliability
for transmissions even for systems with low rate speech codecs and channels with
some distortion.
The results of the thesis are suggestions of symbol patterns and ways to create
and adapt symbols for specific application and channel conditions to achieve the
desired goal for the application Platform: |
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Author:阿铁 |
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Description: OFDM仿真文档，有发射机，接收机，信道，附件有matlab仿真代码-Fixed Broadband Wireless Access (BWA) is a promising technology
which can offer high speed voice, video and data service up to the
customer end. Due to the absence of any standard specification, earlier
BWA systems were based on proprietary standard. IEEE 802.16
WirelessMAN standard specifies a Medium Access Control (MAC) layer
and a set of PHY layers to provide fixed and mobile Broadband Wireless
Access (BWA) in broad range of frequencies. The WiMAX forum has
adopted IEEE 802.16 OFDM PHY layer for the equipment manufacturer
due to its robust performance in multipath environment. The thesis
investigates the simulation performance of IEEE 802.16 OFDM PHY
layer. The Stanford University Interim (SUI) channel models are selected
for the wireless channel in the simulation. The uation was done in
simulation developed in MATLAB. Perfect channel estimation is
assumed. Platform: |
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Author:张晓龙 |
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Description: In the wireless channel, can provide to the multimedia (including voice, image and data) in support of the business has become the development trend of the twenty-first Century communication system. However, its implementation must solve two problems one is the source for efficient compression in order to make full use of the limited channel bandwidth.-In the wireless channel, can provide to the multimedia (including voice, image and data) in support of the business has become the development trend of the twenty-first Century communication system. However, its implementation must solve two problems one is the source for efficient compression in order to make full use of the limited channel bandwidth. Platform: |
Size: 27648 |
Author:Yashoda |
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Description: AT＆T消息工具包提供多渠道消息传递
平台，结合移动文本（短信和彩信），电子邮件，聊天，
语音广播和社交媒体集成到一个基于Web的平台中。-AT&T Messaging Toolkit offers a multi-channel messaging
platform that combines mobile text (SMS and MMS), email, chat,
voice broadcast, and social media into one web-based platform. Platform: |
Size: 356352 |
Author:Carbon |
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Search - voice channel mobile