Location:
Search - fdm.s
Search list
Description: 用matlab仿真实现了25 kHz 带宽内同时传送总共48 kbit/s 的两路语音(每路速率9. 6
kbit/s) 和两路数据信息(速率分别为19. 2 kbit/s 和9. 6 kbit/s) , 仿真结果表明达到了较好的误码性能。并比较了4 种数字调制方式下O FDM 系统的误码性能。-using Matlab Simulation bandwidth of 25 kHz simultaneous transmission within a total of 48 kbit / s 2 Road Voice (rate of 9 per road. 6 kbit / s) and two road data information (rate of 19. 2 kbit / s and 9. 6 kbit / s), the simulation results indicate achieve a better BER. And comparison of four types of digital modulation mode O FDM system BER.
Platform: |
Size: 27107 |
Author: 林志宏 |
Hits:
Description: 用matlab仿真实现了25 kHz 带宽内同时传送总共48 kbit/s 的两路语音(每路速率9. 6
kbit/s) 和两路数据信息(速率分别为19. 2 kbit/s 和9. 6 kbit/s) , 仿真结果表明达到了较好的误码性能。并比较了4 种数字调制方式下O FDM 系统的误码性能。-using Matlab Simulation bandwidth of 25 kHz simultaneous transmission within a total of 48 kbit/s 2 Road Voice (rate of 9 per road. 6 kbit/s) and two road data information (rate of 19. 2 kbit/s and 9. 6 kbit/s), the simulation results indicate achieve a better BER. And comparison of four types of digital modulation mode O FDM system BER.
Platform: |
Size: 26624 |
Author: 林志宏 |
Hits:
Description: 一个很好的介绍ofdm原理框图的文档,强力推荐大家参考-A good introduction OFDM block diagram of the document, strongly recommended reference U.S.
Platform: |
Size: 12288 |
Author: 孙威 |
Hits:
Description: 利用有限差分法 (Finite Differential Method, FDM)将场域离散为许多小网格，应用差分原理，将求解连续函数的泊松方程问题转换为求解网格节点上的差分方程组的问题。-The use of finite difference method (Finite Differential Method, FDM) will field for many small discrete grid, the application of differential principle, the continuous function for solving Poisson' s equation for solving the problem is converted to grid nodes on the issue of differential equations.
Platform: |
Size: 1024 |
Author: 刘文 |
Hits:
Description: 计算机网络，数据链路层，包含arp协议分析，虚拟局域网vlan的配置，以太网协议的分析还有数据链路层的测试题。-Computer network, data link layer, contains the arp protocol analysis, vlan VLAN configuration, Ethernet protocol analysis there are data link layer of the test questions.
Platform: |
Size: 14649344 |
Author: tonghua |
Hits:
Description: 2d FDM 源代码 用于均匀磁场的位场延拓-it s do FOR THE MAGNETION modeling！
Platform: |
Size: 2048 |
Author: yangtingwei |
Hits:
Description: 提出了正交频分复用(O FDM ) 系统中一种新的载波频偏估计算法L 载波频偏估计过程可分
为获取和跟踪, 其中, 获取过程和时间同步是同时完成的L新算法可实现的最大载波频偏获取范围
是整个信号带宽的一半L新的跟踪算法是一个最大似然算法, 在加性白噪声高斯信道(AW GN ) 下,
当N (训练序列长度的一半) 等于128 时, 其性能比Schm idl 算法提高约7127 dB 在多经信道下, 当
信噪比不是很高时, 新算法仍具有优势L-new carrier f requency offset est imat ion scheme in o rthogonal f requency
division mu lt ip lex ing (O FDM ) system is p ropo sed. The carrier f requency offset est i2
mat ion includes acqu isit ion and t rack ing, and acqu isit ion as w ell as t im ing synch ro2
n izat ion can be perfo rmed simu ltaneou sly w ith h igh accu racy. The max imum acqu i2
sit ion range can be up to one half of overall signal bandw idth. The p ropo sed t rack2
ing est imato r is a max imum 2likelihood est imato r, and in AW GN channel, abou t
7127dB imp rovemen t is ob tained compared to the Schm idl’s algo rithm w hen N =
128 in mu lt ipath channel, the p ropo sed algo rithm wo rk s w ell at moderate SNR.
Platform: |
Size: 187392 |
Author: 卫海宁 |
Hits:
Description: 在分析现有算法的基础上, 提出了一种新的算法, 并对其进行了仿真Z仿真结果表明, 无论是
在多径信道还是在AW GN 信道, 该算法的定时估计和频率偏移估计的均方差都要优于最大似然
算法和“集相关”算法Z-O FDM is sen sit ive to t im ing recovery and f requency offset est imat ion,
cu rren t non2data2aided est imat ion methods don’t wo rk w ell on mu lt ipath channel.
Based on the analysis of the cu rren t methods, a new method is p ropo sed and
simu lated. The simu lat ion resu lt s show that the mean square erro r of the t im ing
and f requency offset est imat ion fo r p ropo sed method is superio r to that of the
max imum likelihood and en semb le co rrelat ion methods.
Platform: |
Size: 259072 |
Author: 卫海宁 |
Hits:
Description: 噪声功率比(NPR)这个概念自频分多路复用(FDM)电话系统诞生之初即已出现。简单而
言，NPR用于衡量多通道系统中当其他通道上存在随机活动时，某个闲置通道的“安静”程
度。噪声和交调失真产物进入该闲置通道，从而降低性能。该概念最初用来检查FDM链
路中的4 kHz宽语音通道，如今，在确定多通道宽带通信系统的特性时也是有用的——但在
现代测量技术方面，存在一些重要的区别。-The concept of the noise power ratio (NPR) from the frequency division multiplexing (FDM) had emerged at the beginning of the birth of the telephone system. Nutshell, NPR used to measure multi-channel system when random events on the other channel, a the idle channel' s " quiet" level. Noise and intermodulation distortion products into the idle channel, thereby reducing performance. The concept was originally used to check the FDM link 4 kHz wide voice channel, now, in determining the characteristics of multi-channel broadband communication system is useful- but in modern measurement techniques, there are some important differences.
Platform: |
Size: 594944 |
Author: 边城 |
Hits:
Description: We propose a protocol for secure mining of association rules in horizontally distributed s. The current leading
protocol is that of Kantarcioglu and Clifton [18]. Our protocol, like theirs, is based on the Fast Distributed Mining (FDM) algorithm of
Cheung et al. [8], which is an unsecured distributed version of the Apriori algorithm. The main ingredients in our protocol are two novel
secure multi-party algorithms—one that computes the union of private subsets that each of the interacting players hold, and another
that tests the inclusion of an element held by one player in a subset held by another. Our protocol offers enhanced privacy with respect
to the protocol in [18]. In addition, it is simpler and is significantly more efficient in terms of communication rounds, communication cost
and computational cost.
Platform: |
Size: 1389568 |
Author: senthil |
Hits:
Description: 采用G-S 线迭代方法，用于计算第一类边界条件下的二维温度分布。(FDM applied to the calculation of temperature field.2D)
Platform: |
Size: 6144 |
Author: higgins_j
|
Hits:
Description: Matlab对单自由度系统的解析解的编程，求出瞬态和稳态位移响应(Matlab's programming of the analytical solution of a single degree of freedom system for transient and steady state displacement responses)
Platform: |
Size: 1024 |
Author: 粽子哥哥 |
Hits: