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PAPR-Reduction2
This M Code simulate the effects of clipping and filtering on PAPR PAPR reduction in OFDM-based wireless standard.Also the performance of BER versus SNR of original OFDM signals with PAPR reduction based on clipping and filtering schemes over AWGN channel is evaluated.
The simplest and most widely used technique of PAPR reduction is to basically clip the part of signals that are outside the allowed region.Clipping methode introduces both in band distortion and out of band radiation into OFDM signals which degrades the performance including the BER and spectral efficiency.Filtering can reduce out of band radiation after clipping although it can not reduce in-band radiation distortion.However, clipping may cause some peak regrowth so that the signal after clipping and filtering will exceed the clipping level at some point.To reduce peak regrowth a repeated filtering and clipping operation can be used to obtain a desirable PAPR at a cost of computational complexity increase.
- 2011-05-19 20:47:15下载
- 积分：1
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Modeling-Rayleigh-fading-channel-based-on-modifie
This Matlab Code models a Rayleigh fading channel using a modified Jakes channel model.
A modified Jakes model chooses slightly different spacings for the scatterers and scales their waveforms using Walsh–Hadamard sequences to ensure zero cross-correlation.
alpha_n = frac{pi(n-0.5)}{2M} and eta_n = frac{pi n}{M},
results in the following model, usually termed the Dent model or the modified Jakes model:
R(t,k) = sqrt{frac{2}{M}} sum_{n=1}^{M} A_k(n)left( cos{eta_n} + jsin{eta_n}
ight)cos{left(2pi f_d t cos{alpha_n} + heta_{n}
ight)}.
The weighting functions A_k(n) are the kth Walsh–Hadamard sequence in n. Since these have zero cross-correlation by design, this model results in uncorrelated waveforms. The phases ,! heta_{n} are initialized randomly and have no effect on the correlation properties. Matlab fast Walsh-Hadamard transform function is used to efficiently generate samples using this model.
- 2015-03-10 15:15:01下载
- 积分：1
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NAT9914-Reference-Manual
NI公司GPIB控制芯片NAT9914参考手册(NAT9914 Reference Manual)
- 2015-04-28 20:55:25下载
- 积分：1
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Ch-9.morphological-image-processing
This file consists matlab programs implemented in morphological image processing
- 2013-12-05 13:35:35下载
- 积分：1
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Three_Phase_ACDCAC_PWMconverter
三相PWM逆变器，采用双闭环控制，内环电流，外环电压~~~~(Three-phase PWM Inverter with Double Closed Loop Control)
- 2019-04-20 10:29:41下载
- 积分：1
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music_plane_ZHOU
平面二维阵列，阵列信号处理理论，波达角doa估计(Planar array, matlab program, array signal processing, doa estimated)
- 2014-08-15 11:27:59下载
- 积分：1
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chaostest
本程序是混沌现象测试的源代码,揭示了混沌系统的特性(This procedure is the chaos phenomenon test source code.Characteristics of chaotic system are disclosed
)
- 2013-07-28 19:42:01下载
- 积分：1
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nozzle-and-diffuser
模拟二维可压缩超音速风动内的流动参数随风动形状的变化(Simulate the two-dimensional compressible supersonic wind-driven flow parameters in the wind dynamic changes in shape)
- 2012-11-18 20:59:04下载
- 积分：1
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kalman_predict_correct
本例是使用kalman filter作为状态观测器，对直流无刷电机的状态进行观测。从结果可以看出，对状态估计的效果非常的好(This example is the use of kalman filter as an observer state, the state of brushless DC motors were observed. As can be seen the results of state estimation of the effect is very good)
- 2015-04-09 14:23:16下载
- 积分：1
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block_interlacement
matlab实现块交织模块（CDMA系统交织模块）(matlab realize intertwined block module (CDMA systems are intertwined module))
- 2008-04-10 15:26:57下载
- 积分：1
