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Description: 提高卫星通信信道传输效率的新途径本 文 结 合 V SAT卫星通信系统设计中涉及卫星通信传输技术极为重要的
信道编码与调制解调方式，探讨了各种新型的卫星信道编码与调制解调技术，
它们的原理及在卫星通信中的应用。在数字调制中，信号传输质量主要取决于
比特差错率BER (Bit Error Rate)，因此要尽可能采用相同的每比特信号能量与
噪声功率谱密度比(Eb/N.)的条件下，BER低的调制方式，以节省卫星功率
另外频带利用率要尽可能的高，以节省宝贵的卫星频带。本文还对各种不同的
差错编码与调制技术进行了实验和详细的性能比较。-improve satellite communications channel transmission efficiency of new ways this paper V SAT satellite communications system design involving Wei Star Communication Technology extremely important channel coding and modulation and demodulation, explore a variety of new satellite channel coding and modulation and demodulation techniques, their principles and satellite communications applications. Digital modulation, signal transmission depends on the quality of the main bit error rate BER (Bit Error Rate). therefore possible to use the same energy per bit signal with noise power spectral density ratio (Eb/N.), under the condition BER low modulation mode to save power satellite bandwidth utilization addition to the possible high to save valuable satellite frequency bands. This paper is als
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Size: 3829760 |
Author: 亮仔 |
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Description: 一个OFDM系统的仿真程序,可看出信噪比与误码率之间的关系.-an OFDM system simulation program, we can see the signal-to-noise ratio and bit error rate of the relations between them.
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Size: 1024 |
Author: huang |
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Description: 有关于OFDM在不同信噪比下的误比特率，大家可以看看啊-on OFDM different signal-to-noise ratio in the bit error rate, we can see ah
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Size: 3072 |
Author: fancyou |
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Description: ofdm仿真器，外部功能。输入发射天线数和接收天线数，输出信噪比、误比特率-ofdm simulator, the external function. Importation fired several antennas and receiving antennas few, and the output signal-to-noise ratio, bit error rate
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Size: 1024 |
Author: luoyanqun |
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Description: 采用Log-BP算法的LDPC码译码仿真程序，给出了不同信噪比下误码率和误包率的统计图，用matlab和C（c-mex）程序分别编写，有详细说明和注释。-The use of Log-BP decoding algorithm for LDPC code simulation program is given a different signal to noise ratio and bit error rate under the packet error rate of the statistical map, using matlab and C (c-mex) procedures, respectively, to prepare, has a detailed description and notes .
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Size: 77824 |
Author: 智钢 |
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Description: This program includes:
[5 7] convolutional code (encoder) + BPSK + AWGN + MAP (decoder). It evaluates Bit Error Rate and plots it versus SNR(signal to Noise Ratio).
-This program includes:
[5 7] convolutional code (encoder)+ BPSK+ AWGN+ MAP (decoder). It evaluates Bit Error Rate and plots it versus SNR(signal to Noise Ratio).
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Size: 1024 |
Author: 阳关 |
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Description: 利用LSB算法嵌入隐藏图像，可在广义LSB中设置修改的位平面，返回误码率和峰值信噪比。含各种经典的攻击方式，可用于实验。并可控制攻击的强弱。利用Matlab编写。-LSB embedding algorithm using hidden images, can be generalized to set up modified LSB bit-plane and returned to the bit error rate and peak signal to noise ratio. Containing a variety of classic attack methods can be used for the experiment. Can control the strength of the attack. Prepared using Matlab.
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Size: 110592 |
Author: 张湛 |
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Description: 利用STDM方法嵌入水印信息，可设置量化步长，选择各种经典的攻击方式，控制攻击强弱，返回误码率和峰值信噪比-Stdm method using embedded watermark information, to set the quantization step size, choose a variety of classic attacks, controlling the strength of the attack and returned to the bit error rate and peak signal to noise ratio
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Size: 56320 |
Author: 张湛 |
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Description: 准确的通信工程里的BFSK调制方式的性能仿真。给出了误码率和信噪比等参数。-Accurate communication engineering in the BFSK modulation of performance simulation. Given bit error rate and signal to noise ratio and other parameters.
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Size: 13312 |
Author: 黄姗姗 |
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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: 改善了随着信噪比降低，而导致误码率升高的现象，提高了传输编码的性能-With the improved signal to noise ratio decreased, which led to the phenomenon of increased bit error rate and improve the performance of the transmission encoding
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Size: 1024 |
Author: 柳柳 |
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Description: 一个2发2收的MIMO系统，接收端采用QR检测，最后仿出误码率和信噪比的曲线。信道在接收端已知。-A 2-fa 2 collected MIMO system, using QR detection receiver, and finally like a bit error rate and signal to noise ratio of the curve. Channel known at the receiving end.
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Size: 3072 |
Author: 李静 |
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Description: 关于8PSK解的信噪比和调误码率的仿真程序-8PSK solution on the signal to noise ratio and bit error rate of transfer simulation program
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Size: 1024 |
Author: 彭越 |
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Description: 提出了一个采用(2,1,7)卷积码+QPSK的中频调制解调方案,并在Xilinx公司的100万
门FPGA芯片上实现了该系统。该系统在信噪比SNR为6dB左右时可实现速率超过1Mbit/s、误码率
小于10-5的数据传输。
-Proposed a use of (2,1,7) convolutional code+ QPSK modulation and demodulation of the IF program, and in Xilinx' s FPGA chip one million on implementation of the system. The system SNR to 6dB signal to noise ratio at about the rate may achieve more than 1Mbit/s, less than 10-5 bit error rate of data transmission.
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Size: 62464 |
Author: 张同星 |
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Description: 利用matlab对am，dsb，ssb，ask，fsk，bpsk信号进行正交调制解调仿真，并在不同信噪比条件下对其数字信号进行了误码率的计算。-Using matlab to am, dsb, ssb, ask, fsk, bpsk orthogonal signal modulation and demodulation simulation, and signal to noise ratio in different conditions of its digital signal to the bit error rate calculations.
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Size: 5120 |
Author: 马浩飞 |
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Description: a simple mimo code using 2*2 transmitter and antenna. and measure the bit error rate performance based on the signal to noise ratio
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Size: 1024 |
Author: Yuqun |
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Description: 16QAM的matlab仿真,非常有用,包括Bit mapping,modulation and demodulation,Bit demapping,Parallel to serial conversion,Bit error ratio-16QAM the matlab simulation, very useful, including Bit mapping, modulation and demodulation, Bit demapping, Parallel to serial conversion, Bit error ratio
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Size: 2048 |
Author: 刘悦 |
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Description: it is a code in MATLAB for calculation of bit error ratio vs signal to noise ratio , for multiuser code division multiple access .. usually in any communication system calculation of BER is very important to know the performance of system .. so in this program multiuser CDMA system is used ,, spreading is done using HADAMARD matrix .. or WALSH code .. and BER vs SIGNAL to NOISE ratio graph is computed-it is a code in MATLAB for calculation of bit error ratio vs signal to noise ratio , for multiuser code division multiple access .. usually in any communication system calculation of BER is very important to know the performance of system .. so in this program multiuser CDMA system is used ,, spreading is done using HADAMARD matrix .. or WALSH code .. and BER vs SIGNAL to NOISE ratio graph is computed
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Size: 2048 |
Author: hassan |
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Description: Work for CDMA bit error ratio
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Size: 10240 |
Author: Mamoon |
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Description: Work for CDMA bit error ratio
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Size: 10240 |
Author: ssghbtCol |
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