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Description: QPSK Transmitter and I/Q Correlator Receiver is based on the technique of queing the information in a bit stream and on the receving end using FFT and some additive filters, as the addition of noise is made to infuse the need of a filter. Necessarily a Baseband filter is used. Modulation acheived at the receiving end.
-QPSK Transmitter and I / Q Correlator Recei ver is based on the technique of the infor queing mation in a bit stream and on the receving end usi ng FFT and some additive filters, as the addition of noise is made to infuse the nee d of a filter. Necessarily a Baseband filter is u sed. Modulation achieved at the receiving end.
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Size: 4783 |
Author: xiaoying |
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Description: OFDM及其基带FFT实现原理以及OFDM的载波和符号同步问题-and OFDM baseband FFT principle and the carrier OFDM symbols and Synchronization
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Size: 134202 |
Author: Heaton |
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Description: To fully utilize the available spectrum for a wireless communication
system it is feasible to adapt to different situations
on the channel. In this paper a flexible OFDM
transmitter is presented together with basic theory behind
OFDM transmission. It is shown that high flexibility can
be obtained with a reasonable amount
Flexible baseband transmitter for OFDM
of additional hardware.
Part of the design, the FFT-processor, has already
been fabricated and measurement results are presented.
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Size: 54368 |
Author: leonvan |
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Description: QPSK Transmitter and I/Q Correlator Receiver is based on the technique of queing the information in a bit stream and on the receving end using FFT and some additive filters, as the addition of noise is made to infuse the need of a filter. Necessarily a Baseband filter is used. Modulation acheived at the receiving end.
-QPSK Transmitter and I/Q Correlator Recei ver is based on the technique of the infor queing mation in a bit stream and on the receving end usi ng FFT and some additive filters, as the addition of noise is made to infuse the nee d of a filter. Necessarily a Baseband filter is u sed. Modulation achieved at the receiving end.
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Size: 4096 |
Author: xiaoying |
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Description: OFDM及其基带FFT实现原理以及OFDM的载波和符号同步问题-and OFDM baseband FFT principle and the carrier OFDM symbols and Synchronization
Platform: |
Size: 134144 |
Author: Heaton |
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Description: To fully utilize the available spectrum for a wireless communication
system it is feasible to adapt to different situations
on the channel. In this paper a flexible OFDM
transmitter is presented together with basic theory behind
OFDM transmission. It is shown that high flexibility can
be obtained with a reasonable amount
Flexible baseband transmitter for OFDM
of additional hardware.
Part of the design, the FFT-processor, has already
been fabricated and measurement results are presented.-To fully utilize the available spectrum for a wireless communicationsystem it is feasible to adapt to different situationson the channel. In this paper a flexible OFDMtransmitter is presented together with basic theory behindOFDM transmission. It is shown that high flexibility canbe obtained with a reasonable amount Flexible baseband transmitter for OFDMof additional hardware.Part of the design, the FFT-processor, has alreadybeen fabricated and measurement results are presented.
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Size: 54272 |
Author: |
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Description: FFT应用于GPS快捕方面的IEEE文章，对于基带处理方面有帮助-FFT applied to GPS fast catching aspects of IEEE articles, there is help for the baseband processor
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Size: 841728 |
Author: 刘旭东 |
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Description: GPS信号基带处理方面在IEEE文章
信号跟踪和捕获-GPS signal baseband signal in the IEEE article, track and capture
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Size: 254976 |
Author: 刘旭东 |
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Description: GPS信号基带处理方面在IEEE文章
信号跟踪和捕获-GPS signal baseband signal in the IEEE article, track and capture
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Size: 303104 |
Author: 刘旭东 |
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Description: labview program for computing fft baseband using svt libraries
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Size: 50176 |
Author: ben |
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Description: The Zoom-FFT is a process where an input signal is mixed down to baseband and then decimated, prior to passing it into a standard FFT. The advantage is for example that if you have a sample rate of 10 MHz and require at least 10Hz resolution over a small frequency band (say 1 KHz) then you do not need a 1 Mega point FFT, just decimate by a factor of 4096 and use a 256 point FFT which is obviously quicker.
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Size: 5120 |
Author: 张鹏程 |
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Description: 中文摘要
正交频分复用（ OFDM ， Orthogonal Frequency Division
Multiplexing）是当前一种非常热门的通信技术。它即可以被看作是一种
调制技术，也可以被看作是一种复用技术。由于它具有抗多径衰落和频谱
利用率高的特点，因此被广泛应用于高速数字通信领域，比如应用于IEEE
802.11a无线局域网（WLAN）的物理层等等。
我的毕业设计的核心任务是：采用 FPGA 来实现一个基于OFDM 技术
的通信系统中的基带数据处理部分，即调制解调器。其中发射部分的调制
器包括：信道编码（Reed-Solomon 编码），交织，星座映射，FFT和插
入循环前缀等模块。我另外制作了相应的解调器，可以实现上述功能的逆
变换。
另外，我还对OFDM技术， IEEE 802.11a的标准文献，基于Simulink
的 OFDM 模型和仿真，ALTERA 公司的技术和 IP Core 的使用等方面进
行了研究。这些在文章中都有体现。
-Abstract
Orthogonal frequency division multiplexing (OFDM, Orthogonal the Frequency Division,
Multiplexing) is a very popular communication technology. It can be seen as a
Modulation technique can also be seen as a multiplexing technique. Because of its resistance to multipath fading and spectrum
High utilization characteristics, and is widely used in high-speed digital communications, such as used in IEEE
802.11a wireless LAN (WLAN) physical layer.
The core mission of my graduation project: FPGA to implement a technology based on OFDM
Communication systems in baseband data processing part, ie the modem. These emission part of the modulation
Includes: channel coding (Reed-Solomon coding), interleaving, constellation mapping, FFT and interpolation
Into the cyclic prefix modules. I also produced a corresponding demodulator can achieve the inverse of the above functions
Transformation.
In addition, OFDM technology, the IEEE 802.11a standard literature, based on Simulink
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Size: 1553408 |
Author: 万利 |
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Description: 采用FPGA 来实现一个基于OFDM 技术
的通信系统中的基带数据处理部分，即调制解调器。其中发射部分的调制
器包括：信道编码（Reed-Solomon 编码），交织，星座映射，FFT 和插
入循环前缀等模块。-FPGA to implement a baseband data based on OFDM technology in the communication system processing section, namely modem. Transmitter modulator includes: channel coding (Reed-Solomon coding), interleaving, constellation mapping, FFT and insert the cyclic prefix modules.
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Size: 1553408 |
Author: pipi_dog |
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Description: 算法主要针对桥梁拉索索力频谱法测试应用
1、调用FFT进行快速傅里叶变换；
2、获取变换后峰值；
3、通过峰值和设计基频比较，取得最接近这几基频的结果-Algorithm main bridge cable force spectrum method for testing an application, call the FFT fast Fourier transform 2, to obtain a peak after the transformation 3, by comparing the peak and design baseband, baseband get closest to these results
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Size: 52224 |
Author: 无风 |
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Description: 基于hdl的ofdm基带处理器发射机的设计与实现
包括 工作时钟 主控单元 导频插入 长短训练序列生成 data符号调制 循环前缀与加窗处理 IFFT/FFT 信道编码 扰码模块等-Hdl of ofdm transmitter baseband processor based design and implementation including work clock master unit pilot insertion length of the training sequence generated data symbol modulated cyclic prefix and windowing IFFT/FFT channel coding scrambling module,
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Size: 2598912 |
Author: 郭俊 |
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Description: 用MATLAB实现基带信号I/Q两路信号合成后的FFT变换-Using MATLAB to achieve baseband signal I/Q two-way signal after the synthesis of FFT transform
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Size: 1024 |
Author: 蒋小凯 |
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Description: 实现基于STBC的MIMO_OFDM通信系统在不同信噪比情况下接收端的误比特率的仿真。发射端包括基于基带调制、空时编码、导频插入、IFFT、串并合并以及添加循环前缀；接收端包括去除循环前缀、取出导频估计信道、FFT运算以及并串合并，空时解码等。仿真中采用QPSK、空时编码采用4*3的复正交空时编码矩阵。OFDM子载波数为100，每个子载波传输66个符号，每个符号2比特。IFFT长度为512个符号。发射天线为3个接收天线为2个。(The BER simulation of MIMO_OFDM communication system based on STBC under different SNR is realized. The transmitter includes baseband modulation, space-time coding, pilot insertion, IFFT, serial-parallel combination and adding cyclic prefix; the receiver includes removing cyclic prefix, extracting pilot estimation channel, FFT operation, parallel-serial combination, space-time decoding, etc. The complex orthogonal space-time coding matrix is used in QPSK and space time coding in 4*3. The number of OFDM subcarriers is 100, and each subcarrier transfers 66 symbols with 2 bits per symbol. IFFT is 512 symbols in length. The transmitting antenna is 3 receiving antennas, 2.)
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Size: 3072 |
Author: guokeDz |
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