在三條徑的瑞利信道中，對于直接序列擴頻： (1) 請設計DS-CDMA一種具體的碼分導引輔助的信道估計方法，接收機分別采用等均益合并、最大比合并。用Simulink進行仿真，測量BPSK的誤碼率性能，畫出比特信噪比與信道估計均方誤差的關系曲線，畫出比特信噪比與誤碼率的關系曲線，請解釋在誤碼率為0.01時，兩種合并方式所表現的不同的物理意義。 (2) 設頻率已經同步，請設計DS-CDMA一種具體的單停頓滑動相關時間同步方法，用Simulink進行仿真(自己編寫代碼S-function方式)，分析所設計方案的時間同步精度，畫出比特信噪比與捕獲概率的關系曲線。 (3) 設時間已經同步，請設計DS-CDMA一種具體的頻率方法，用Simulink進行仿真(自己編寫代碼S-function方式)，畫出比特信噪比與頻率同步誤差的關系曲線。
標簽： 信道
上傳時間： 2017-01-25
上傳用戶：ruan2570406
用Simulink仿真卷積編碼，并用Viterbi譯碼的方法進行解碼，其中的編解碼全部自己編寫代碼(S-function方式)
上傳時間： 2013-12-10
上傳用戶：songrui
Excel的強大函數功能，為我們帶來了極大方便，雖然它有200多個函數，但有時我們為實現一項規定的功能，可能用到幾個函數或者采用嵌套函數，這樣應用起來，也不太方便。其實對于我們經常用到的功能，我們可以創建自定義函數UDF(User—defined function)，它的運行與Excel中自帶的函數完全相同。建立自定義函數有以下幾個優點：建立自己特殊的功能和名稱的函數；能將復雜的、嵌套的、多個原有的函數組合在一起，發揮更大的威力。
上傳時間： 2013-12-24
上傳用戶：gxrui1991
documentation for optimal filtering toolbox for mathematical software package Matlab. The methods in the toolbox include Kalman filter, extended Kalman filter and unscented Kalman filter for discrete time state space models. Also included in the toolbox are the Rauch-Tung-Striebel and Forward-Backward smoother counter-parts for each filter, which can be used to smooth the previous state estimates, after obtaining new measurements. The usage and function of each method are illustrated with five demonstrations problems. 1
標簽： documentation mathematical for filtering
上傳時間： 2014-01-20
上傳用戶：changeboy
documentation for optimal filtering toolbox for mathematical software package Matlab. The methods in the toolbox include Kalman filter, extended Kalman filter and unscented Kalman filter for discrete time state space models. Also included in the toolbox are the Rauch-Tung-Striebel and Forward-Backward smoother counter-parts for each filter, which can be used to smooth the previous state estimates, after obtaining new measurements. The usage and function of each method are illustrated with five demonstrations problems. 1
標簽： documentation mathematical for filtering
上傳時間： 2013-12-10
上傳用戶：zxc23456789
The BNL toolbox is a set of Matlab functions for defining and estimating the parameters of a Bayesian network for discrete variables in which the conditional probability tables are specified by logistic regression models. Logistic regression can be used to incorporate restrictions on the conditional probabilities and to account for the effect of covariates. Nominal variables are modeled with multinomial logistic regression, whereas the category probabilities of ordered variables are modeled through a cumulative or adjacent-categories response function. Variables can be observed, partially observed, or hidden.
標簽： estimating parameters functions defining
上傳時間： 2014-12-05
上傳用戶：天誠24
cordic methods describe essentially the same algorithm that with suitably chosen inputs can be used to calculate a whole range of scientific functions including sin, cos, tan, arctan, arcsin, arccos, sinh, cosh, tanh, arctanh, log, exp, square root and even multiply and divide. the method dates back to volder [1959], and due to its versatility and compactness, it made possible the microcoding of the hp35 pocket scientific calculator in 1972. here is some code to illustrate the techniques. ive split the methods into three parts linear, circular and hyperbolic. in the hp35 microcode these would be unified into one function (for space reasons). because the linear mode can perform multiply and divide, you only need add/subtract and shift to complete the implementation. you can select in the code whether to do the multiples and divides also by cordic means. other multiplies and divides are all powers of 2 (these dont count). to eliminate these too, would involve ieee hackery.
標簽： essentially algorithm describe suitably
上傳時間： 2017-03-02
上傳用戶：litianchu
This is GPS Acquisition..by Matlab, this file performs cold start acquisition on the collected "data". It searches for GPS signals of all satellites, which are listed in field "acqSatelliteList" in the settings structure. function saves code phase and frequency of the detected signals in the "acqResults" structure.
標簽： Acquisition acquisition collected performs
上傳時間： 2013-12-28
上傳用戶：wxhwjf
This is GPS Matlab findPreambles finds the first preamble occurrence in the bit stream of each channel. The preamble is verified by check of the spacing between preambles [6sec] and parity checking of the first two words in a subframe. At the same time function returns list of channels, that are in tracking state and with valid preambles in the nav data stream.
標簽： findPreambles occurrence the preamble
上傳時間： 2013-12-23
上傳用戶：秦莞爾w
Fast Fourier Transform power point The rectangular window introduces broadening of any frequency components [`smearing鈥? and sidelobesthat may overlap with other frequency components [`leakage鈥?. 鈥he effect improves as Nincreases 鈥owever, the rectangle window has poor properties and better choices of wncan lead to better spectral properties [less leakage, in particular] 鈥搃.e. instead of just truncating the summation, we can pre-multiply by a suitable window function wnthat has better frequency domain properties. 鈥ore on window design in the filter design section of the course
標簽： rectangular introduces broadening Transform
上傳時間： 2017-03-25
上傳用戶：change0329
