参考网上的提供的代码,我把uCosII移植到MSP430f149上,分三个任务,分别是485通讯,键盘扫描,LED显示,可供参考!- Refers to code which on-line provides, I transplant uCosII to MSP430f149 on, divides three duties, respectively is 485 communications, scanning, LED demonstrated
标签： on-line uCosII Refers which
上传时间： 2013-12-11
上传用户：xieguodong1234
We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation, phase-shift keying, and pulse amplitude modulation communications systems.We study the performance of a standard CFO estimate, which consists of first raising the received signal to the Mth power, where M is an integer depending on the type and size of the symbol constellation, and then applying the nonlinear least squares (NLLS) estimation approach. At low signal-to noise ratio (SNR), the NLLS method fails to provide an accurate CFO estimate because of the presence of outliers. In this letter, we derive an approximate closed-form expression for the outlier probability. This enables us to predict the mean-square error (MSE) on CFO estimation for all SNR values. For a given SNR, the new results also give insight into the minimum number of samples required in the CFO estimation procedure, in order to ensure that the MSE on estimation is not significantly affected by the outliers.
标签： frequency-offset estimation quadrature amplitude
上传时间： 2014-01-22
上传用户：牛布牛
This paper examines the asymptotic (large sample) performance of a family of non-data aided feedforward (NDA FF) nonlinear least-squares (NLS) type carrier frequency estimators for burst-mode phase shift keying (PSK) modulations transmitted through AWGN and flat Ricean-fading channels. The asymptotic performance of these estimators is established in closed-form expression and compared with the modified Cram`er-Rao bound (MCRB). A best linear unbiased estimator (BLUE), which exhibits the lowest asymptotic variance within the family of NDA FF NLS-type estimators, is also proposed.
标签： performance asymptotic examines non-data
上传时间： 2015-12-30
上传用户：225588
In recent years large scientific interest has been devoted to joint data decoding and parameter estimation techniques. In this paper, iterative turbo decoding joint to channel frequency and phase estimation is proposed. The phase and frequency estimator is embedded into the structure of the turbo decoder itself, taking into consideration both turbo interleaving and puncturing. Results show that the proposed technique outperforms conventional approaches both in terms of detection capabilities and implementation complexity.
标签： scientific parameter interest decoding
上传时间： 2015-12-30
上传用户：894898248
DELPHIBOX The ImageHTML converts images to ASCII characters in HTML format. The output image is in three formats: true color, grayscale, and mono color. The ImageHTML is provided "AS IS " without any warranty of any kind, either express or implied. The entire risk as to the quality and performance of the software is with you. The author is not liable for any damages resulting from the use and misuse of the software. The ImageHTML is freeware. You may copy it as long as you copy all of files.
标签： characters DELPHIBOX The ImageHTML
上传时间： 2013-12-27
上传用户：zhichenglu
rtl8019参考，his package included three directories. One is for hardware, one is for software and one is for utility. I gather them from Internet or our server.
上传时间： 2016-02-02
上传用户：xiaodu1124
A new cable fault location method based on wavelet reconstruction is proposed. In this method the difference between the currents of faulty phase and sound phase under the high voltage pulse excitation is used as the measured signal and is decomposed in multi-scale by wavelet transform, then reconstructed in single scale. Comparing with traditional fault location method by travelling wave, the presented method will not be interfered by the reflected wave from the branch joint of cables or from other positions where the impedances are not matched and not be influenced by fault types, otherwise, the reflected waves can be recognized even the faulty position is near to the measuring terminal, at the same time, the influence of the wave speed uncertainty can be reduced. The correctness of the proposed method is proved by simulation results.
标签： method reconstruction location proposed
上传时间： 2016-02-04
上传用户：maizezhen
These Simulink blocks contain transfer functions that model the pressure and flow transients for axisymmetric 2D viscous flow of a compressible fluid in a straight rigid circular cross section pipelines. Three models are available: (1) pressures at the ends (2) flow rates at the ends (3) pressure at one end and flow rate at the other Filtering is incorporated to reduce numerical oscillation (Gibbs phenomenon). See J. Dyn. Systems, Meas. & Control vol 122 (2000) pp. 153-162.
标签： transients functions Simulink transfer
上传时间： 2014-01-22
上传用户：Shaikh
Background maintenance is a frequent element of video surveillance systems. We develop Wallflower, a three-component system for background maintenance
标签： surveillance maintenance Background Wallflower
上传时间： 2016-02-22
上传用户：tianyi223
将数字时间转换为英语口语表达形式，控制台形式。其实核心代码为一个类，可以自己修改输出形式。 比如输入 8 15 10 45 5 30 2 20 2 40 0 0 就能转换为： It s twenty past eight It s a quarter past eight It s a quarter to eleven It s half past five It s twenty past two It s twenty to three 注意： 输入 0 0 后结束并显示结果 方式为每行两个数，中间用空格空开 第一个数0到12表示小时，第二个数0到59表示分钟
上传时间： 2013-12-09
上传用户：大融融rr
