Description: 1IC网友 做的硬盘MP3资料公开
该播放器使用了美国atmel公司出品的mp3播放器专用芯片at89c51snd1c.
本芯片特性如下：
1)MCS51内核，可以利用单片及开发软件Keil软件方便开发mp3播放器，无需特殊软件平台；
2)MPEG I/II-Layer 3 hardware decoder
.独立MP3 Decoder
.支持48,44.1,32,24,22.05,16khz取样频率
.支持软件31阶音量控制,高中低音均衡控制
.重低音效果
3)集成DAC部件，支持PCM,IIS格式；
4)64K字节片上代码存储空间（100K次擦写寿命）
5)4K字节boot flash memory,USB/UART下载代码
6)集成USB1.1 device部件
7)MMC卡接口
8)IDE/ATAPI接口（HDD/CD-ROM Interface)
9)2通道ADC,8Khz取样-1IC Netizen done disclosing information on the hard drive MP3 player that uses a ATMEL producer of the m p3 players ASIC at89c51snd1c. the chip features are as follows : 1) MCS51 kernel, and can use a single software Keil software development and facilitate the development of MP3 players, without special software platform; 2), MPEG I / II-Layer 3 hardware decoder. De independent MP3 coder. 48,44.1,32,24,22.05 support, ASF sampling frequency. support software volume control 31 bands, high school bass equalization control. bass results 3) DAC integrated components, support PCM, IIS format; 4) 64K-byte on-chip code storage space (100K erase life time) 5) 4K bytes boot Flash h memory, USB / UART download code 6) integrated USB 1.1 device components 7) MMC card interface 8) IDE / ATAPI interfac Platform: |
Size: 1008633 |
Author:史比 |
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Description: 通信方面的基础算法，关于相空间分析，小波标架，时频分析等的一些matlab源代码-Communications based on algorithms, on the phase-space analysis, wavelet frame, time-frequency analysis, such as some matlab source code Platform: |
Size: 328704 |
Author:dirknash |
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Description: 一篇西安电子科技大学的硕士论文，讨论了各种空时编码技术的设计准则和编译码方案，分析了不需要信道状态信息的差分酉空时编码调制技术，给出了仿真结果。-Xidian University, a master s thesis, discussed a wide range of space-time coding technology, design criteria and codec programs analyzed do not need to channel state information of Differential Unitary Space-Time code modulation technology, the simulation results. Platform: |
Size: 2368512 |
Author:fisher |
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Description: 此算法是基于空间旋转不变技术（ESPRIT）编写的matlab程序，用来提取信号的频率，幅值，衰减时间常数，相位等参数-This algorithm is based on the space ESPRIT (ESPRIT) prepared matlab procedures used to extract the signal frequency, amplitude, decay time constant, the phase parameters such as Platform: |
Size: 2048 |
Author:mylifeforwar |
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Description: simulation of BER of orthogonal space time block code over frequency flat Rayleigh faing channel Platform: |
Size: 1024 |
Author:郑中 |
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Description: 本源码可以完成二维傅里叶变换，把图像从时域变换到频域，很好用-this source code can finish fast fourier transformation, which can transform image from time space to frequency, it is very good Platform: |
Size: 107520 |
Author:王杰 |
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Description: 频率选择性衰落信道中一种低复杂度的正交空时分组码译码算法。该方案借鉴D-BLAST系统的检测方法，采用干扰抵消和干扰置零方法消除多径干扰，从而有效地检测出期望信号，译码复杂度低。有创新，希望给研究OSTBC译码的同志带来帮助。-Frequency-selective fading channel a low-complexity orthogonal space-time block code decoding algorithm. The program builds on D-BLAST system, detection method, using interference cancellation and interference nulling method to eliminate multipath interference, in order to effectively detect the desired signal, decoding complexity is low. Innovative, hoping to research helpful to the comrades OSTBC decoding. Platform: |
Size: 327680 |
Author:tang |
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Description: 本书是“移动通信前沿技术系列”之一，全书共分18个章节，主要对协作通信及网络知识作了介绍，具体内容包括空时分集和编码、空时频分集与空时频编码、中继信道及协议、单中继协作通信、多节点协作通信等。全书内容分为三部分，第一部分回顾传统的MIMO系统，介绍空间、时间、频率分集的概念。第二部分主要考虑协作通信物理层的关键问题，并对其提出了行之有效的解决方案，比如针对协作通信的分布式特点，提出分布式空时(频)码；针对协作通信的频谱效率问题，提出了新颖和有效的协作方案。第三部分介绍协作通信对物理层之上的MAC层、网络层及应用层产生的影响，内容涉及如何协作路由，如何通过协作使网络覆盖范围增大，如何延长网络寿命等。-This book is one of the "cutting edge mobile communication technology series". The book is divided into 18 chapters, mainly on cooperative communications and network knowledge and specific content including the empty hours of collection and coding, space-time-frequency diversity and space-time frequency coding, relay channel and protocols, single-relay cooperative communication, multi-node cooperative communications. Platform: |
Size: 4773888 |
Author:郑永钊 |
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Description: Every thing about MIMO system and OFDM, including Matlab source, timing, frequency synchronization, equalization, estimation, PAPR, space time block code, channel capacity Platform: |
Size: 8389632 |
Author:nonicknoname |
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Description: 这是用SIMULINK的S-FUNCTION方式编写的系统仿真代码，系统是基于4G网络的核心技术空时分组编码的MIMO-OFDM通信系统的，涉及到空间分集、时间分集和频率分集的有机结合，包括QPSK调制解调、IFFT调制、控制编解码、基于训练符号的信道估计等通信模块。包括main_STBC_MIMO_OFDM和training_symbol两个M文件和一个DOC文件，对各部分的都有详细的代码和注释。-It is used SIMULINK the S-FUNCTION approach to the preparation of the system simulation code, the system is based on the 4G network s core technology space-time block coded MIMO-OFDM communication system, involving spatial diversity, time diversity and frequency diversity of the organic combination, including QPSK modulation and demodulation, IFFT modulation, control of encoding and decoding, symbol-based channel estimation training and other communication module. Including main_STBC_MIMO_OFDM and training_symbol two M file and a DOC file, have detailed the various parts of the code and comments.
Platform: |
Size: 13312 |
Author:masong |
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Description: nRF24L01-Quick-Dev
2.4GHz nRF24L01开发系统使用手册
为了便于用户开发应用先进的2.4GHz nRF24L01高速2Mbps无线芯片开发，迅通科技提供nRF24L01快速开发系统，nRF24L01开发系统包括两个无线高速多频道模块、两个开发板(含可更换MCU及用户开发空间)，详细源代码，原理图，资料光盘，开发板上有MCU、串口、按键和指示灯等，加电即可使用，可完成无线双向数据高速传输的全部功能，并可方便地进行性能以及距离评测，并迅速掌握nRF24L01的多频以及高速无线通信编程和协议的设计。
时间：缩短你的开发时间，建立你对2.4GHz RF产品开发的信心
风险：接近实用的评估板，方便验证和改进，零风险
费用：只需不到一个工程师一个月的薪水或你预算内很小一部分
市场：可对多种产品及应用进行验证，实现平台的验证与应用
资料：技术资料全，上手快，可以使你立刻进入与世界同步的2.4GHz无线设计领域-NRF24L01-Quick-Dev
2.4GHz nRF24L01 development system manual.
In order to facilitate the users to develop the application of advanced 2.4GHz nRF24L01 2Mbps high speed wireless chip development, electric technology to provide nRF24L01 rapid development system, the development of nRF24L01 system includes two wireless high speed multi channel module, two development board (including replaceable MCU and user space ), detailed source code, schematics, data discs, the development board MCU, serial, buttons and lights, power can be used, can complete the two-way wireless high-speed data transmission of all functions, and can be conveniently carried out performance as well as the distance measure, and quickly grasp nRF24L01 multiple frequency and high speed wireless communication programming and protocol design.
Time: reduce your development time, build your confidence on 2.4GHz RF product development
Risk: close to the practical evaluation board, convenient for validation and impr Platform: |
Size: 432128 |
Author:万奇 |
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Description: we present a new space–time block code for timeand frequency-selective (doubly-selective) channels. It can be interpreted
as the extension of the Alamouti code to doubly-selective channels, and relies on a joint time–frequency reversal of the transmitted sequences. Under
certain channel conditions, the proposed space–time block code belongs
to the class that achieves full spatial, delay, and Doppler diversity using a
maximum-likelihood (ML) receiver, as well as a linear zero-forcing (LZF)
or linear minimum mean-squared error (LMMSE) receiver. For realistic
doubly-selective channels, a real-valued linear data model is presented, for
which different receiver structures can be developed. Platform: |
Size: 1024 |
Author:phuong |
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Description: ns STBC for purely time-selective channels by transforming the
time-selective channels into frequency-selective channels, and by
adjusting existing space–time code designs over frequency-selective
MIMO channels to collect joint space–Doppler gains over purely
time-selective MIMO channels. Further, [14] uses the ideas of [12] to
develop a space–time code that can achieve full space-delay-Doppler
diversity for any number of transmit–receive antennas. However, to
quantify the maximum Doppler diversity order [2], the above papers
rely on a parsimonious critically sampled complex-exponential basis
expansion model (CCE-BEM) for the underlying purely time-selective
or doubly-selective channels [16]. However, the CCE-BEM may have
a large modeling error under certain channel conditions Platform: |
Size: 1024 |
Author:phuong |
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Description: Signal identification represents the task of a receiver
to identify the signal type and its parameters, with applications
to both military and commercial communications. In this paper,
we investigate the identification of spatial multiplexing (SM) and
Alamouti (AL) space-time block code (STBC) with single carrier
frequency division multiple access (SC-FDMA) signals, when
the receiver is equipped with a single antenna. We develop a
discriminating feature based on a fourth-order statistic of the
received signal, as well as a constant false alarm rate decision
criterion which relies on the statistical properties of the feature
estimate. Furthermore, we present the theoretical performance
analysis of the proposed identification algorithm. The algorithm
does not require channel or noise power estimation, modulation
classification, and block synchronization. Simulation results show
the validity of the proposed algorithm, as well as a very good
agreement with the theoretical analysis. Platform: |
Size: 376832 |
Author:c103 |
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Search - Space Time Frequency code