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spreadspectrum
In a normal communication channel, it is often desirable to concentrate the information in as narrow a region of the frequency spectrum as possible in order to conserve available bandwidth and to reduce power. The basic spread spectrum technique, on the other hand, is designed to encode a stream of information by spreading the encoded data across as much of
the frequency spectrum as possible. This allows the signal reception, even if there is interference on some frequencies. While there are many variations on spread spectrum communication, we concentrated on Direct Sequence Spread Spectrum encoding (DSSS). The DSSS method spreads the signal by multiplying it by a chip, a maximal length pseudorandom sequence modulated at a known rate. Since the host signals are in discrete-time format, we can use the sampling rate as the chip rate for coding.
- 2012-04-12 20:54:14下载
- 积分：1
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biomaterialscasestudy
Several case studies for biomaterials.Included heart valves, wound dressing, dental biomaterials and joint replacement.
- 2010-11-11 14:25:20下载
- 积分：1
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waveannprotected
face detection recognition method wave
- 2009-12-29 01:46:07下载
- 积分：1
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rs
说明： rs码的simulink仿真图，可以观察加噪声和不加的误码情况(rs simulink simulation code map, can be observed without added noise and bit error conditions)
- 2011-12-16 22:01:00下载
- 积分：1
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MinimumCostFlow
最小费用最大流算法通用Matlab函数，最短路算法的Ford和Fulkerson法迭加算(Common minimum cost maximum flow algorithm Matlab function, the shortest path algorithm of Ford and Fulkerson method of superposition operator)
- 2014-02-09 14:51:55下载
- 积分：1
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ssimplex
单纯形算法法的matlab程序,用于解决线性规划问题,十分好用.(Simplex algorithm matlab law procedures, to resolve linear programming problems, very easy to use.)
- 2007-11-04 08:38:14下载
- 积分：1
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201301051
解决排队论的程序，涉及到排队论的所有问题。参加数学建模时用。(Program to solve the queuing theory, queuing theory involves. Participate in mathematical modeling.)
- 2013-01-05 20:43:15下载
- 积分：1
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sofm
A self-organizing map (SOM) or self-organizing feature map (SOFM) is a type of artificial neural network (ANN) that is trained using unsupervised learning to produce a low-dimensional (typically two-dimensional)
- 2013-11-08 16:42:04下载
- 积分：1
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Predicting-the-geo-temporal-variation-of-crime-an
Traditional police boundaries—precincts, patrol districts, etc.—often fail to reflect the true distribution of criminal activity and thus do
little to assist in the optimal allocation of police resources. This paper introduces methods for crime incident forecasting by focusing upon
geographical areas of concern that transcend traditional policing boundaries.
- 2013-11-24 20:42:38下载
- 积分：1
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paper3
A Modified Design of ACF Operation for Reducing PAPR of OFDM Signal
- 2015-03-12 22:22:43下载
- 积分：1
