Description: 本文详细介绍了LTE系统在进行MATLAB仿真时的步骤以及各种各种参数的设置及计算。-This paper introduces the LTE system simulation in MATLAB and a variety of steps to set up various parameters and calculations. Platform: |
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Author:赵冰冰 |
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Description: This M Code simulate the effects of clipping and filtering on 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.
-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.
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Author:shahram |
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Description: （1） 在c或matlab环境下实现卷积码编码模块，并嵌入实验一的通信链路中，要求编码模块有一定通用性可以设定约束长度、卷积码抽头系数；
（2） 设定约束度分别为7、9的1/2卷积码，仿真分析这些码的硬判决译码性能、绘制误码性能曲线，对比不同约束度下卷积码的性能，分析译码复杂性；
（3） 设定约束度为7的1/2卷积码，进行无量化软判决译码，仿真分析比较软硬判决译码性能；
（4） 设定约束度为7的1/2卷积码，量化比特分别为3、4、5、6，仿真分析比较量化对误码性能的影响；
（5） 对约束度为7的1/2卷积码，分别设定回溯长度为14、21、28、35、42进行仿真比较其性能。
-(1) achieved in c or matlab environment convolution code module, and a communication link embedded experiments, the encoding module requires a certain versatility can set the constraint length convolutional code tap coefficients (2) setting constraint degree respectively 7,9 1/2 convolutional codes, hard decision decoding performance simulation analysis of these codes, error performance curve drawing, comparing the performance of different constraints of convolution codes, decoding complexity analysis ( 3) the degree of constraint is set to 7 1/2 convolutional code-free quantized soft decision decoding, simulation analysis and comparison of hard and soft decision decoding performance (4) the degree of constraint is set to 7 1/2 convolutional code quantization bits respectively 3,4,5,6, simulation analysis and comparison to quantify the impact on error performance (5) the degree of constraint of 7 1/2 convolutional code are set back a length of 14, 21, 28,35,42 compare its performan Platform: |
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Author:刘介园 |
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