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Description: 无线电台研究中频数字化研究，希望对大家有所帮助-IF digital radio research study, I hope all of you to help
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Author: shirley |
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Description: 软件无线电中数字上下变频器研究与实现，适合通信专业人员参考-Digital Software Radio Research and Implementation of up and down converter for communication professionals reference
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Description: 数字收音机控制功能：AM/FM自动，手动选台，显示频段等结果-Digital Radio Control Function: AM/FM automatic, manual selection, such as the results show that band
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Size: 5120 |
Author: zouhe |
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Description: 完整的OFDM链路程序并作了较为具体的解析从基本的bpsk,qpsk,qam到实际的ofdm系统，cdma链路，mac层仿真分析.-Orthogonal frequency division multiplexing (OFDM) is becoming the chosen
modulation technique for wireless communications. OFDM can provide large data
rates with sufficient robustness to radio channel impairments. Many research centers
in the world have specialized teams working in the optimization of OFDM for
countless applications. Here, at the Georgia Institute of Technology, one of such
teams is in Dr. M. A. Ingram’s Smart Antenna Research Laboratory (SARL), a part
of the Georgia Center for Advanced Telecommunications Technology (GCATT).
The purpose of this report is to provide Matlab code to simulate the basic processing
involved in the generation and reception of an OFDM signal in a physical
channel and to provide a description of each of the steps involved. For this purpose,
we shall use, as an example, one of the proposed OFDM signals of the Digital
Video Broadcasting (DVB) standard for the European terrestrial digital television
(DTV) service.
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Author: 田静 |
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Description: 运动目标模拟器相参性分析，分析了基于数字射频存储器(DRFM)的运动目标模拟器(MTS)相参性。由于DRFM延时的离散性,引起了MTS输出信号相位的改变,破坏了信号的相参性,使MTS输出信号频谱发生变化,不仅使谱线位置移动,而且还产生了附加的寄生谱线。分析结果表明,延时更新率(Fc)决定了谱线间隔,并通过sinc函数决定谱线的幅度,而雷达信号频率与所模拟目标的速度共同决定谱线的移动。
-Moving Target Simulator Coherent Analysis, Moving Target Simulator (MTS)-based digital radio frequency memory (DRFM) coherent. Due to the the DRFM delay discrete MTS output signal of the phase change is caused, the destruction of the phase of the signal parameters, the MTS output signal spectrum changes, not only the spectral line position, but also generates additional parasitic spectral line. The analysis results show that the delay update rate (Fc) determines the spectral interval by sinc function determines the amplitude of the spectrum, while the radar signal frequency and speed together determine the movement of the spectral lines of the simulated target.
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Author: 李亮 |
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Description: In this paper, the feasibility of replacing a chaos source by an equivalent digital pseudo-random generator realized using Linear Feedback Shift Register (LFSR) is studied. Particular emphasis is given on the digital implementation Piece-Wise Linear A ffine Maps (PWAM). As an application, an FPGA implementation of four different maps has been experimentally verifi ed in a FM-DCSK test radio system.
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Author: gsbnd |
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Description: 随着数模转换器硬件的快速发展和DSP处理能力及处理速度的逐步提高，软件无线电技术在商用和军用无线电通信领域也越来越显示出其强大的吸引力。本文研究的高速中频采样和数字下变频技术是目前蓬勃发展的软件无线电领域的两项关键技术。-As advances in technology provide increasingly faster and less expensive digital hardware, more of the traditionally analog functions of a radio receiver will be replaced with software or digital hardware. The software radio has show its fascinating functions in both commercial and military wireless communication. The high speed and high resolution analog-to-digital converter and digital down-converter which are researched in this thesis are two of the key technologies in the field of software radio that is vigorously developing recently.
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Author: zc |
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Description: 1、采用无线数字识别技术，每个开关各自独立密码，不会相互干扰。
2、兼容常规手动操作功能，无线射频遥控，无方向性。
3、依据国际电工惯例设计、安装、接线和普通机械墙壁开关完全相同。
4、适用各种类型的合格灯具、家用电器等，无需另接外围器件。
5、开关与遥控器之间采用智能分键学习对码，可增配遥控器或增装多个开关。
6、内置异常保护功能及用户可换保险管，具有防雷功能。-1, the use of wireless digital identification technology, separate password for each switch and will not interfere with each other. 2, compatible with conventional manual operation function, radio frequency remote control, no direction. 3, in accordance with the practice of the International Electrotechnical design, installation, wiring and general machinery is identical to the wall switch. 4, applies to all types of qualified lamps, household appliances and so on, then no other peripheral devices. 5, between the remote control switch with smart key learning points of the code may be assigned by remote control or by a number of switches installed. 6, built-in protection function abnormalities and the user can control for insurance, with mine-protected.
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Author: 戴明伟 |
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Description: Digital down-converters (DDC) are a key
component for digital radio. The DDC performs
the critical frequency translation needed
to recover the information from a digitized
modulated signal.
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Author: internship |
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Description: 现场可编程门阵列（FPGA）已经不再单纯应用在芯片与系统之间的直接互联层，在软件无线电（SDR）中，FPGA逐渐用做通用运算架构来实现硬件加速单元，在降低成本和功耗的基础上提升性能表现。SDR调制解调器的典型实现包括通用处理器（GPP）、数字信号处理器（DSP）和FPGA。而且，FPGA架构可以结合专用硬件加速单元，用来卸载GPP或DSP。软核微处理器可以结合定制逻辑，扩展其内核，也可以将分立的硬件加速协处理器添加到系统中。此外，还可将通用布线资源放在FPGA中，这些硬件加速单元可以并行运行，进一步增强系统的整体运算输出能力-Field programmable gate array (FPGA) is no longer a simple chip and system used in the direct interconnection between the layers, in the Software Defined Radio (SDR) in, FPGA increasingly used as general-purpose computing architecture to achieve hardware acceleration units to reduce costs in and power consumption based on the performance upgrade. SDR modem to achieve a typical general-purpose processor, including (GPP), digital signal processor (DSP) and FPGA. Moreover, FPGA architecture can be combined with dedicated hardware acceleration units to uninstall GPP or DSP. Soft-core microprocessors can combine custom logic and to expand its core, it can be the separation of hardware-accelerated co-processor added to the system. In addition, resources can also be placed on general-purpose FPGA routing, these hardware acceleration units can be run in parallel, to further enhance the overall computing system, the output capacity
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Author: gg |
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Description: A software defined radio is a transmitter and receiver system that uses digital signal processing (DSP) for coding, decoding, modulating, and demodulating data. This project focused on using the IEEE 802.11a specification to create a software radio.The feasibility of using Mathwork,s Simulink and Texas Instrument¡ ¯ s Code Composer Studio to design, test, and prototype an OFDM.
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Author: Rafal |
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Description: 文中应用软件无线电思想对数字下变频器中的几个关键技术进行了研究,对下变频各个模块所涉及到的CIC、HB、FIR等关键算法进行了讨论、提炼与总结,应用matlab软件设计了下变频器中的CIC、HB、FIR滤波器等核心模块,并将各模块融为一体从软件实现的角度完成了对系统的搭建和功能仿真.仿真结果表明,系统实现了对中频信号的下变频处理且无失真现象,大大减少了软件无线电系统数宁信号处理的运算量和数据的存储量,极大地提高了系统的实时性.-The paper application software radio digital down converter in the thinking of several key technologies have been studied for the next conversion involved in each module to the CIC, HB, FIR and other key algorithms were discussed, refined and summarized the application of matlab software design downconverter in the CIC, HB, FIR filters and other core modules, and integration of various modules from the software point of complete structures and functions of the system simulation. The simulation results show that the system achieved the right under the IF signal Frequency processing and without distortion, thus greatly reducing the number of software-defined radio system, rather the amount of signal processing operations and data storage capacity, greatly improve the system in real time.
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Author: 王楚宏 |
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Description: 对DRFM原理的解释，非常清楚--Statistical processing techniques for detecting DRFM repeat-jam radar signals&Digital radio frequency memory linear range gate stealer spectrum-Right DRFM explanation of the principle is very clear- Statistical processing techniques for detecting DRFM repeat-jam radar signals & Digital radio frequency memory linear range gate stealer spectrum
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Author: 佳 |
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Description: 基于软件无线电的SFF平台，采用Xilinx System Generator实现的数字上变频器-SFF platform based on software radio, using Xilinx System Generator to achieve digital upconverter
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Size: 53248 |
Author: 刘荣毅 |
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Description: 本文以软件无线电为指导，提出基于CORDIC算法利用FPGA平台数字下变频器设计方案。首先分析下变频器的结构；然后采用模块化设计思想，将数字下变 频的功能模块包括数字控制振荡器、CIC抽取滤波、HBF抽取滤波器、FIR低通滤波器进行分析和FPGA的设计；最后在 MATLAB/DSPBuilder下硬件仿真模块进行仿真并给出仿真结果。-In this paper, software-defined radio as the guidance, based on the CORDIC algorithm uses the FPGA platform, digital down-converter design. First analyzes the structure of down-converter and then use a modular design concept, the digital down-conversion function modules including digital controlled oscillator, CIC decimation filtering, HBF decimation filter, FIR low-pass filter for analysis and FPGA design the final In the MATLAB/DSPBuilder under the hardware emulation module simulation and simulation results.
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Author: jiang |
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Description: important for software defined radio and digital communications
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Author: ARUN AGARWAL |
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Description: 软件无线电技术是用于卫星导航和第三代移动通信(3G) 数据处理和计算的最优解决方案。运用基于FPGA的So PC 嵌入式设计方法构造软件无线电系统,提高了对动态实时信号的处理能力。设计完成无线通信体系结构,以及ADC 模数转换,数字下变频,CPU 中央处理器,DSP 运算单元,PCI 桥以及数据控制等模块的详细组成。相对于目前常规系统,该系统在功耗和体积方面可节省30 以上,对高速数据流的处理和计算能力有显著提高,可以应用于Cellular/ PCS 基站,GPS 抗干扰接收机,相控阵接收机,频谱分析和3G无线通信等领域。-Software radio technology is used for satellite navigation and third-generation mobile communication (3G) data processing and computing the optimal solution. So PC using FPGA-based embedded design methods to create software-defined radio system to improve the dynamic real-time signal processing capabilities. Wireless communications architecture design is completed and the ADC analog-digital conversion, digital down conversion, CPU CPU, DSP computing unit, PCI bridge, and data control module, the detailed composition. Relative to the current conventional systems, the system can save power consumption and size are more than 30 of the high-speed data stream processing and computing power has significantly increased, can be applied to Cellular/PCS base stations, GPS anti-jamming receivers, phased array receivers, spectrum analysis, and 3G wireless communications and other fields.
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Author: x |
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Description: WCDMA数字预失真FPGA实现论文，文中对功率放大器对信号的失真放大进行了研究，同时结合软件无线电，实现了算法-FPGA realization of digital pre-distortion WCDMA papers, the text of the power amplifier distortion amplification of the signal has been studied, combined with software-defined radio to realize the algorithm
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Author: 蔡俊杰 |
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Description: AN383_Si47XX_ANTENNA_SCHEMATIC_LAYOUT_AND_DESIGN_GUIDELINES.pdf 数字收音机开发必备,要买代理商芯片才有的资料哦 -AN383_Si47XX_ANTENNA_SCHEMATIC_LAYOUT_AND_DESIGN_GUIDELINES.pdf digital radio development necessary, buy only the information agent oh chip
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Author: 王道 |
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Description: 对讲机在诸多行业领域广泛应用。虽然模拟对讲机现今仍垄断市场，但数字通信以其更丰富的业务种类，更好的业务质量、保密性和连接性，尤其可提高频谱效率，更有效利用宝贵的频谱资源，因此对讲机数字化是大势所趋。这里介绍一种基于CC1101射频器件的数字无线对讲机的语音通信技术。-Radio widely used in many industries. Although the current analog radio is still monopolizing the market, but a richer digital communications with its business lines, better service quality, security and connectivity, in particular, can improve the spectrum efficiency, more efficient use of valuable spectrum resources, it is the trend of digital radio . Here CC1101 RF devices based on digital wireless walkie-talkie voice communication technology.
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Author: dffgdds |
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