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Description: 64个子载波的OFDM系统在多径衰落信道中LS和MMSE信道估计误码率比较，MATLAB程序-64 sub-carrier OFDM system in multipath fading channel LS and MMSE channel estimation error rate more, the MATLAB program
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Size: 2459 |
Author: Y.P.Zhou |
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Description: 64个子载波的OFDM系统在多径衰落信道中LS和MMSE信道估计误码率比较，MATLAB程序-64 sub-carrier OFDM system in multipath fading channel LS and MMSE channel estimation error rate more, the MATLAB program
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Size: 2048 |
Author: Y.P.Zhou |
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Description: 在matlab下实现多径信道仿真，计算误比特率-Matlab achieved in multi-path channel emulation, bit error rate calculation
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Size: 5120 |
Author: 朱振华 |
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Description: 对ofdm插入梳妆（comb)导频，比较了有ls信道估计和无信道估计，并仿真得到了不同信噪比下，误码率曲线；信道为多径瑞利衰落加上白噪声；经过调试，已经能正确运行-Insert the dressing on the OFDM (comb) Pilot compared ls has no channel estimation and channel estimation, and simulation have been under different signal to noise ratio, bit error rate curve channel for multipath Rayleigh fading plus white noise after debugging have been able to run correctly
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Size: 3072 |
Author: 吕明相 |
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Description: 升余弦滚降的误码率和信噪比曲线，取样时间无偏差，但信道是多径信道，衰减系数0.5
傅立叶变换及反变换参见t2f-and-f2t-Raised cosine roll-off of the bit error rate and signal to noise ratio curve, sampling time deviation, but the channel is a multipath channel, the attenuation coefficient of 0.5 Fourier Transform and inverse transform see t2f-and-f2t
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Size: 1024 |
Author: 刘临政 |
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Description: 程序详细仿真了再多经情况下，系统的误码率-A more detailed simulation procedures by the circumstances, the system bit error rate
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Size: 5120 |
Author: tome |
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Description: matlab在通信系统中的常用例题。其中有AMI编码的功率谱，升余弦滚降系统，最佳升余弦滚降系统及误码率，多径传播。-matlab in the communication system used in the example. Among them, the power spectrum AMI coding or cosine roll-off system, the best or cosine roll-off system and the bit error rate, multipath spread.
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Size: 5120 |
Author: 陈琛 |
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Description: 研究OFDM系统抗干扰技术，采用Matlab仿真环境，评价采用循环前缀(CP)和均衡技术的OFDM系统在多径环境和衰落信道条件下的误比特率、误帧率等性能指标。-Study on anti-jamming technology OFDM system using Matlab simulation environment to evaluate the use of cyclic prefix (CP) technology and balanced OFDM system in multipath fading channel environment and under the condition of bit error rate, frame rate, such as misuse of performance indicators.
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Size: 6144 |
Author: xiefengbo |
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Description: The multipath performance of a given signal/receiver combination depends on various signal and receiver parameters like signal type/modulation scheme pre correlation bandwidth and filter characteristics, chipping rate of code ,relative power levels of multipath signals ,chip spacing between correlators and type of discriminator used for tracking.
For the following analyses the influence of code multipath will be illustrated by means of multipath error envelopes.
In these diagrams, the resulting ranging errors are plotted as a function of geometric path delay .the computation of
multipath errors envelops is based on the assumption, that the direct signal component is always available and that only one
multipath signal is present-The multipath performance of a given signal/receiver combination depends on various signal and receiver parameters like signal type/modulation scheme pre correlation bandwidth and filter characteristics, chipping rate of code ,relative power levels of multipath signals ,chip spacing between correlators and type of discriminator used for tracking.
For the following analyses the influence of code multipath will be illustrated by means of multipath error envelopes.
In these diagrams, the resulting ranging errors are plotted as a function of geometric path delay .the computation of
multipath errors envelops is based on the assumption, that the direct signal component is always available and that only one
multipath signal is present
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Size: 5120 |
Author: Rafal |
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Description: OnPerformanceLimitsofDFTSpreadOFDMSystems
DFT Spread OFDM has been proposed recently to
reduce the Peak to Average Power Ratio (PAPR) of conventional
OFDM transmission. Besides PAPR reduction, an important
implication of DFT Spreading is that the independent parallel
sub-channels between the sub-carriers cease to exist. This in
turn leads to difference in its performance limits as compared to
the conventional OFDM system. This paper analyzes the error
probabilities of DFT Spread OFDM systems, and derives their
analytical closed form expressions for the AWGN, fading AWGN,
multipath and fading multipath channel scenarios. Simulation
results presented in last section confirm the validity of the derived
analytical expressions.
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Size: 2151424 |
Author: ashokec |
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Description: Matlab的OFDM在多径Rayleigh信道下的同步
1. 假设频率已同步，设计OFDM一种具体的采用循环前缀进行时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。
2. 设时间已同步，设计OFDM一种具体的采用循环前缀进行频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线.-Matlab-OFDM in multipath Rayleigh channel synchronization 1. Assume that the frequency has been synchronized, the design of a specific OFDM cyclic prefix for time synchronization method, using Simulink simulation to depict the bit signal to noise ratio and the capture probability curve. 2. Set up time is synchronized to design a specific OFDM cyclic prefix for frequency synchronization method, using Simulink simulation to depict the bit signal to noise ratio and frequency synchronization error of the curve.
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Size: 21504 |
Author: the13thstone |
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Description: 多径误差包络的仿真，能够清晰的看出。希望对大家有所帮助。-Multipath error envelope simulation, can be clearly seen. We want to help.
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Size: 1024 |
Author: zhanglifen |
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Description: 要求对有3条固定路径的AWGN多径信道中的QPSK系统进行BER性能仿真，并与在理想的AWGN信道中同样系统的BER性能进行比较。熟悉瑞利平坦衰落、莱斯平坦衰落与频率选择性衰落的特点，比较这些衰落信道的误码率。-Required to have three fixed-path AWGN multipath channels of QPSK system BER performance simulation, and in an ideal AWGN channel with the same system BER performance comparison. Familiar with the Rayleigh flat fading, Rice flat fading and frequency selective fading characteristics, compare the bit error rate fading channel.
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Size: 1024 |
Author: 沈岗 |
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Description: 一个通用模型的相干多径误差调制信号跟踪BOC,在寻求使用全球导航卫星系统（GNSSs）导航精度的主要挑战是减少测量和星历误差。统称现代化将减少测量误差，提供了一个更大的全球导航卫星系统各种努力，需要新的卫星研制和发射，并因此发生过了很多年的时间尺度。全球定位系统（GPS）的用户，星历误差是最近完成调用的传统精度改进倡议，或L-AII的，只涉及修改地面优点的努力目标。这一努力的结果在一个永久的广播星历误差减少25％[1]。-A General Model of Multipath Error for Coherently Tracked BOC Modulated Signals
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Size: 702464 |
Author: 李洋 |
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Description: 为了克服原有抗多径算法在偏移二进制载波( BOC)信号上性能不如粗捕码( coar se/ acquisition co de, C/ A 码)的缺点, 并消除 BOC信号在跟踪时特有的多峰模糊特性, 将一种
新的参考码应用在 BOC信号的跟踪中,并与窄相关器以及高分辨相关器( HRC)技术进行了比较, 分别给出了多径误差包络, 从仿真结果中得出了最佳参考码码型,并根据最佳参考码
分析了成形( Shaping) 相关器的噪声性能。Shaping 相关器消除了多峰模糊的特点,并在多径误差包络上要优于窄相关器以及HRC 算法,也很容易在原有基础上修改实现。该研究为未来的导航接收机中 Shaping相关器的应用打下了坚实的基础。-Abstract: Exis tin g algorithm s are worse when applied to binary
offset carrier ( BOC) signals than for the coarse/ acquisition ( C/ A)
code in GPS receivers. Th is paper pres ent s a new ref erence code f or
BOC s ignal t racking and gives the multipath error envelope compared
to the narrow correlat or method and high resolut ion correlat or. The
best reference code is determined by simulations and the noise
performance of the best reference code is analyzed. The mult-ipeak
fuzzyness is cancelled by a Shaping correlator. The performance of
the Shaping correlator ps multipath mitigaion is better than the
narrow correlator and the high resolution correlator.This correlator is easy to realizes the Shaping correlat or can be easily used in
future n avigat ion receivers.
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Size: 425984 |
Author: 白合 |
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Description: OFDM通信系统抗多径衰落性能仿真，最后给出不同信道下，循环前缀、均衡技术对系统误码率影响的比较曲线，并得出结论。-OFDM communication system simulation of multipath fading Finally, under different channel, cyclic prefix, equalization impact on the system bit error rate comparison curve, and draw conclusions.
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Size: 3072 |
Author: 王威 |
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Description: matlab实现多径信道升余弦滚降最佳基带系统的误码率 -matlab achieve multipath channel raised cosine error rate the best baseband system
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Size: 1024 |
Author: Monsoon |
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Description: In wireless sensor networks, multipath routing is
used to alleviate reliability degradation due to multihop transmissions
over error-prone wireless channels. However, multipath
routing is not energy-efficient, as it requires all the nodes in the
network to always be awake. To prolong the network lifetime
while maintaining a certain reliability performance, we propose
Sleeping Multipath Routing, which selects the minimum number
of disjoint paths to achieve a given reliability requirement and
puts the rest of the network to sleep.
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Size: 104448 |
Author: ShAzZ |
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Description: BPSK QPSK 16QAM BFSK 在高斯信道下，瑞丽信道下，多径（三条径）下的误码率仿真对比，-BPSK QPSK 16QAM BFSK in Gaussian channel, under Ruili Channel, multipath error rate (three diameter) under the simulation comparison,
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Size: 12288 |
Author: 杨义 |
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Description: 完整的OFDM系统，包含调制解调，加入导频，循环前缀，在多径信道下的误比特率分析-Complete OFDM system, including modulation and demodulation, to join the pilot, cyclic prefix, in multipath channel bit error rate analysis
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Size: 3072 |
Author: fighting |
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