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ifdma_tfrank
The Interleaved Frequency Division Multiple Ac-
cess (IFDMA) scheme is based on compression, repetition and
subsequent user dependent frequency shift of a modulated signal.
Multiple access is enabled by the assignment of overlapping but
mutually orthogonal subcarriers to each user. In this paper it
is shown that IFDMA can be regarded as unitary precoded
OFDMA with interleaved subcarriers. On the other hand,
IFDMA is shown to be a CDMA variant with frequency domain
orthogonal signature sequences and chip interleaving. Thus, it
combines the advantages of single and multi carrier transmission
such as low peak to average power ratio, orthogonality of the
signals of different users even for transmission over a time
dispersive channel and low complexity. Simulation results show
the good performance of coded IFDMA transmission over a
mobile radio channel for different data rates.
- 2010-12-01 19:31:38下载
- 积分：1
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singularitydetection
提出一种两阶段的奇异点检测方法。将指纹图像分块，求出各块的方向构成块方向图，并在块方向图的基础上利用邻域方向的分
布分析结合改进的Poincare Index方法来确定奇异点所在的候选区域，对候选区域中的像素再通过计算局部方向变化率来确定奇异点的精
确位置。将此方法用于对FVC2004 DB1_A指纹数据库的图像，实验结果表明这种方法对指纹图像中的噪声有很好的鲁棒性，并且计算简
单快速，易于实现。
(A two-phase singularity detection. Fingerprint image block, calculate the direction of each block constitute a block pattern, and pattern in the block based on the use of the distribution of the direction of the neighborhood together with the improved Poincare Index method to determine the singular point where the candidate regions of the candidate region of pixels re-calculated to determine the rate of change of local direction of the precise location of singular points. This method is used to FVC2004 DB1_A fingerprint database of images, experiments show that this method of noise on the fingerprint image has good robustness and computing simple and fast, easy to implement.)
- 2010-05-18 10:35:11下载
- 积分：1
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usart
this is a usart project
- 2015-03-06 23:46:45下载
- 积分：1
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431
说明： 三端稳压可调集成芯片．应用很广，可当制作各种类型的稳压源(Three-terminal adjustable regulator ICs. Application is very broad, can be produced when the source of all types of regulators)
- 2010-03-29 14:01:39下载
- 积分：1
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2D-FFT
构造一个线性调频信号作为差频信号进行2D FFT处理
(create a LSM signal.
make 2D FFT of the signal above
)
- 2020-11-08 17:39:52下载
- 积分：1
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FDTD3
本程序实现2维TM波FDTD仿真,此程序用PML设置吸收边界条件(This procedure to achieve two-dimensional TM wave FDTD simulation, this procedure is set with the PML absorbing boundary condition)
- 2009-09-17 10:34:37下载
- 积分：1
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coreFormatIn
核心数据处理 核心数据处理 核心数据处理 核心数据处理 核心数据处理 核心数据处理 核心数据处理(Core data-processing core data processing core data-processing core data processing core data-processing core data processing core data-processing)
- 2007-12-16 07:57:35下载
- 积分：1
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lab5
这个是一个image processing 的实验，说的是如何利用matlab中的函数做基本的image处理(this is an image processing lab based on matlab, so it says how to use basic matlab functions to do image processing problems)
- 2010-02-10 20:16:19下载
- 积分：1
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kk
说明： authorware authorware authorware authorware authorware authorware
- 2010-03-15 23:42:07下载
- 积分：1
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QRfenjiwsuanfa
基于QR分解算法的自适应波束方向图形成，运算量较小(adaptive beamforming algorithm based on QR decomposition)
- 2012-04-06 16:28:17下载
- 积分：1
