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Description: 介绍了一种构建在定点DSP上的高速瑞利衰落信道仿真模型。通过应用确知性瑞利过程的理论，使得仅需要较少的低频正弦波分量以及简单的运算即可实现较高精度的信道建模；进而可采用查表法并结合TMS320C6202定点数字信号处理器的高并行性和处理能力构造高速的仿真模型-Construction of a fixed-point DSP in the high-speed Rayleigh fading channel simulation model. Through the application process unascertained Rayleigh theory, only need to make small low-frequency sine wave components and the simple operation can achieve higher accuracy Channel modeling; then use look-up table method and combination TMS320C6202 fixed-point digital signal processor parallel and can handle Construction of the high-speed simulation model
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Size: 117760 |
Author: 李艳平 |
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Description: 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（没有多径）中同样系统地BER性能进行比较-to have three fixed path over the AWGN Channel QPSK BER performance system simulation, and with the ideal AWGN channel (multi-path) to the same system BER performance comparison
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Size: 5120 |
Author: xiecao |
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Description: P89LPC935,AD转换应用实例,立即转换模式,固定通道单次转化.-P89LPC935, AD converter application, conversion mode immediately, fixed channel single conversion.
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Size: 307200 |
Author: 方波 |
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Description: 多径信道仿真
有三条固定路径的AWGN多径信道的QPSK系统进行BER性能方针，并与在理想的AWGN信道中同样系统的BER进行比较，为简化模型，作如下假设：
1，信道中有三条路径，包括一条没有衰落的LOS路径和两条具有瑞利衰落的路径。与各路径相应的接收功率以及路径间的延迟差是仿真的参数
2，信道的锐利衰落仅影响发送信号的幅度，不影响瞬时相位。
3，在符号间隔内各多径分量的衰减幅度是常数，并与相邻间隔无关。-Multipath channel simulation There are three fixed path multipath AWGN channel BER performance of QPSK systems approach, and in an ideal AWGN channel BER the same system for comparison, in order to simplify the model, make the following assumptions: 1, There are three channels path, including a no decline LOS path and the two have a Rayleigh fading path. Corresponding with the path to receive power as well as the path delay difference between the simulation parameters of 2, channel sharp decline affects only the magnitude of the transmitted signal, does not affect the instantaneous phase. 3, in the symbol intervals multipath component of the decay rate is constant, and has nothing to do with the next interval.
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Size: 5120 |
Author: TT |
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Description: 根据有无固定基础设施，无线局域网又可分为BSS (Basic Service Set)和IBSS (Independent Basic Service Set)。我们要研究的ad hoc网络属于后者。假设在一个ad hoc网络中，移动节点的发射功率PTx总是恒定的。要发送数据的移动节点总是先监听信道，测量接收到的信号功率X，其中X= I + N, I为接收到的干扰，N是噪声。移动节点只有在X＜INThre时，才可以发射。式中，INThre为背景噪声门限。
在仿真中，我们规定每个移动节点的发射功率是常数，PTx = 1W；接收节点接收机的灵敏度Smin = -80 dBm；信号质量 min = 2 dB；系统的背景噪声门限INThre = 1.2e-10。
-According to the availability of fixed infrastructure, wireless local area network can be divided into BSS (Basic Service Set) and IBSS (Independent Basic Service Set). We have to study the ad hoc network belong to the latter. Assuming in an ad hoc network, mobile node s transmission power is always constant PTX. To send data to the mobile node always monitor channel, measuring the received signal power X, which X = I+ N, I was received interference, N is the noise. Mobile node only when X <INThre when it is fired. Where, INThre threshold for background noise. In the simulation, we require that each mobile node s transmission power is constant, PTx = 1W receiver node receiver sensitivity Smin =-80 dBm signal quality
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Size: 7168 |
Author: 何炳钦 |
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Description: 3条固定路径的AWGN多径信道中的QPSK系统进行BER性能仿真，并与理想信道(没有多径)作比较。
需要的支撑子程序为qpsk_berest.m,vxcorr.m,random_binary.m.-Three fixed-path multipath AWGN channel QPSK system BER performance simulation, and with the ideal channel (no multipath) for comparison. Need the support of subprogram for qpsk_berest.m, vxcorr.m, random_binary.m.
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Size: 1024 |
Author: liuhui |
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Description: 笔者长期从事移动通信系统的无线链路调制与解调、物理层实现方面的工作。在移动通信GSM系统中，我们进行语音或者业务信道解调时，都会遇到CRC的求解。通常在硬件DSP实现时，特别是40位CRC求解时候，由于生成多项式有41项，DSP最大一次能处理40位，所以使用单个寄存器会遇到一些困难，那么以下这个程序将会解决这一困难（这是针对定点DSP、C55xx的编程实现方法）。-The author has long been engaged in mobile communication system modulation and demodulation of wireless links, the physical layer to achieve work. GSM in the mobile communications system, we have a voice or channel demodulation operations, it will encounter the solution of CRC. DSP hardware usually realize, especially when solving the 40 CRC, as the generation polynomial has 41, DSP can handle the largest 40, so using a single register may encounter some difficulties, then following this process will solve this One difficulty (which is for fixed-point DSP, C55xx realize programming methods).
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Size: 3072 |
Author: 戴浩 |
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Description: 笔者长期从事移动通信系统的无线链路调制与解调物理层实现方面的工作，所以在这里我们给出语音或者业务信道链路过程的交织与解交织的DSP实现方法。需要说明的是：这是针对定点DSP、C55xx的编程实现方法，希望对读者有益。-The author has long been engaged in mobile communication systems wireless link physical layer modulation and demodulation realize the work, so here we give voice channel link or business process interwoven with deinterleave realize the DSP approach. It should be noted that: This is for fixed-point DSP, C55xx programming realize, and I hope that useful to readers.
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Size: 3072 |
Author: 戴浩 |
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Description: In communication systems channel poses an important role. channels can convolve many different kind of distortions to our information. In perticular wireless channels multipath distortion is sevear.
and more sevear is such distortion is random.
To handle this, multipath affected channels require Equalizers at receaver end.
such equalizer uses different learning Algorithms for identifying channels continuously.
This project is VHDL implementation of LMS learning algorithm with pipelined architecture. so this implementation can work with higher data rates with less clock speed requirments and so with less power consumpiton
It uses Fixed point arithmatic blocks for filtering so suitable for coustom asic.
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Size: 14336 |
Author: Arun |
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Description: 对有3条固定路径的 多径信道中的 系统进行 性能仿真，并与在理想的 信道（没有多径）中同样系统的 性能进行比较。-For three fixed-path multipath channel performance simulation systems, and in an ideal channel (no multipath) in the same comparison of the performance of the system.
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Size: 4096 |
Author: Tuoknight |
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Description: 3G系统中动态信道分配的研究，对于固定和可移动边界两种方案进行了仿真实现，可移动边界方案显示出了明显的优势。-3G system, dynamic channel allocation study, fixed and moving boundary for the two scenarios were simulated to achieve, removable border program showed a clear advantage.
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Size: 2048 |
Author: 高婷 |
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Description: 无线信道模型的介绍，WIMAX工作组文档，对典型信道模型进行了描述，文中含SUI信道的MATLAB仿真代码-Wireless channel model introduction, WIMAX Working Group document, on a typical channel model is described, the text contains SUI channel MATLAB simulation code
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Size: 156672 |
Author: 陈兆梅 |
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Description: MMSN最早的针对无线传感器网络的固定信道分配的多信道MAC协议-MMSN the first wireless sensor network for the fixed channel assignment of multi-channel MAC protocol
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Size: 295936 |
Author: jin fen |
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Description: 对3条固定路径的AWGN多径信道中的QPSK系统进行BER性能仿真（不同p和delay 的取值来分别定义莱斯（瑞利）平坦衰落信道、莱斯（瑞利）频率选择性衰落信道).-For three fixed-path multipath AWGN channel of the QPSK system BER performance simulation (different values for p and the delay are defined Rice (Rayleigh) flat fading channel, Rice (Rayleigh) frequency-selective fading channels ).
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Size: 8192 |
Author: minmin |
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Description: 数据链路层的选择性重传协议的编写。在仿真环境下编程实现有噪音信道环境下
两站点之间无差错双工通信。信道模型为8000bps 全双工卫星信道，信道传播时延270毫秒，信道误码率
为10-5，信道提供字节流传输服务，网络层分组长度固定为256字节-The data link layer selective retransmission protocol preparation. In the simulation environment, programming environment, the noise channels between the two sites error-free duplex communication. Channel model for 8000bps full duplex satellite channel, the channel propagation delay 270 milliseconds, the channel bit error rate of 10-5, the channel to provide byte-stream transport service, the network-layer packet length is fixed to 256 bytes
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Size: 207872 |
Author: chenchen |
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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: matlab实现一维小区定向信道锁定借用（BDCL）和FCA（固定信道分配）阻塞率比较的仿真程序，并对小区信道数对阻塞率的影响也进行了图形描述！-matlab plot to achieve one-dimensional directional channel locking to use (BDCL) and FCA (fixed channel allocation) Comparison of blocking rates of the simulation program, and the cell number of channels on the blocking probability is also studied in the graphic description!
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Size: 11264 |
Author: wangcongyi |
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Description: 超宽带（UWB）的多频带OFDM与定点transmitterreceiver物理层建模
UWB的分析
超宽带的BPSK分析
第五阶导数的BPSK超宽带
超宽带信道模型
超宽带链接分析
超宽带单环
超宽带单脉冲
超宽带多旋回-Ultra-wideband (UWB) multiband OFDM physical layer with fixed-point transmitterreceiver modeling analysis of UWB UWB BPSK Fifth Order Derivative analysis of BPSK UWB UWB UWB channel model for UWB link analysis of UWB single-loop single-pulse ultra-wideband polycyclic
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Size: 224256 |
Author: 苗俊 |
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Description: 分析了固定码率的raptor codes在RICIAN衰落信道下的性能-Of a fixed rate of raptor codes in RICIAN performance under fading channel
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Size: 360448 |
Author: 臧强 |
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Description: In this paper, we integrate the channel assignment and
power assignment into a distributed channel access
algorithm. A cost-function is introduced to provide some
optional channels according to their cost for transmitted
power level searching. The simulation results show that this
algorithm largely increases capacity compared with the
fixed channel allocation (FCA). The proposed algorithm
can adapt to the call saturated state of network and does not
cause high intracell handover access. It has a short average
call setup time even at high traffic loads. We suggest that
the intracell handover rate should be a factor in evaluation
of an algorithm’s performance, because high handover
access will intensively increase the load of switch and cause
much higher call dropping and blocking probabilities than
those we expect.
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Size: 590848 |
Author: raghu |
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