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软件无线电信道化发射机及其FPGA实现 总被引:1,自引:0,他引:1
首先建立了信道化软件无线电发射机数学模型,并对该模型进行了算法优化,在对现行的硬件实现方案比较分析后,提出了用FPGA(现场可编程门阵列)实现该发射机结构的简单有效方法,用Altera公司的仿真软件QUARTUSⅡ4.0和IP Core对其实现进行了仿真,比较发现该仿真结果与MATLAB给出的理论仿真结果一致.这种信道化发射机能同时发射整个处理带宽内所有信道上的信号,具有很高的运算效率,且结构简单,可行性强. 相似文献
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介绍了以软件无线电技术为基础,构想一种高效的软件化全数字信道化发射机的基本原理和实现方法。基于多速率数字信号处理中的内插理论,结合多相滤波技术建立该发射机的数学模型,并进行多路信号发射的多相滤波器组的设计和计算机仿真,最后开展了以现场可编程门阵列(FPGA)芯片作为数字信号处理单元和基于高速PCI标准总线通信卡结构的信道化发射机的通用硬件平台的研制,结果表明该信道化发射机的设计方案是可行的。 相似文献
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软件无线电技术是近年来提出的一种实现无线通信的新的体系结构,它具有很强的灵活性与开放性。采用BOK调制的方法,基于软件无线电来研究线性调频信号的调制解调,在Simulink环境下对该线性调频系统进行建模和仿真,并利用FPGA进行软件仿真验证。 相似文献
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本文以软件无线电理论为指导,以π/4DQPSK调制为特例,重点介绍了软件无线电发射机数字信号处理部分在FPGA上的实现,主要包括数据映射、成形滤波、CIC插值滤波和NCO等。在设计上使用了基于多相滤波和单MAC的成形滤波器及高效CIC插值滤波器,使性能和资源占用率获得了较好的突破。与专用芯片相比,用FPGA实现的软件无线电发射机更具灵活性。 相似文献
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软件决定了软件无线电的功能,是软件无线电的灵魂.软件无线电的市场前景很大一部分取决于对已经出现的无线通信设备的兼容能力,选取优化的算法十分必要.本论文对此进行了研究,并给出试验结果.算法仿真环境为美国Elanix公司的System View仿真软件. 相似文献
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In vehicular networks, radio waves propagate in an external environment and are therefore subject to many obstacles such as buildings, trees or hills. Modeling the transmission range by a perfect circle around each transmitter is absolutely wrong especially in urban environments. In our previous work, we defined a terrain characteristics-based propagation model for vehicular network. This model determines the received signal power according to the type and the density of obstacles encountered by the radio waves. In this paper we calibrate the model parameters to meet the physical layer specifications of the standard dedicated to inter-vehicular communication, 802.11p. We validate the new values by several simulation tests. Based on this model, we present a study of the radio connectivity for a vehicular network in city environment and evaluate the impact of obstacles on information dissemination in such a network. The tests are performed by considering a simulation environment that represents a real city map. We define several metrics characterizing the radio connectivity and the information dissemination and examine the effect of vehicles density and obstacles on those metrics. 相似文献
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In this paper we propose a novel spectrum sharing protocol for overlay cognitive radio networks using non-orthogonal multiple access (NOMA), spatial modulation (SM) and antenna selection (AS). The proposed protocol allows a secondary transmitter (ST) to transmit simultaneously to both a primary receiver (PR) and a secondary receiver (SR) using SM. The usage of NOMA and SM will increase the spectral efficiency for both PR and SR with reduced detection complexity than the case without NOMA in which the detectors are required to jointly detect both SM symbols at each receiver. The application of AS at ST with regards to PR provides higher quality transmission for PR without affecting the performance of SR. The performance of the proposed protocol is investigated by derivations of upper bounds on the average symbol error probabilities at PR and SR and by Monte Carlo simulations. Analytical and simulation results show that the proposed protocol offers efficient spectrum utilization over spectrum sharing protocols proposed recently that uses SM – to convey the primary data to PR through the amplitude phase modulation technique and the secondary data to SR through the index of the active antenna. 相似文献
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In this contribution, a software multipath fading simulation package (previously applied to the statistical analysis of the fading statistics of single transmitter schemes for three very different mobile radio environments) is used to analyze the performance of a quasi-synchronous, multitransmitter, amplitude modulated sideband diversity area coverage system. By conducting field trials in an area known to obey Rayleigh fading statistics, it has been possible to compare the simulated statistical results to those obtained theoretically and experimentally, and to show that good agreement exists. The fading simulator is capable of being extended to other types of multitransmitter radio scheme employing different forms of modulation. 相似文献
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针对机载综合射频开放式系统架构,为了在软件综合层面上实现波形应用软件与具体平台的解耦,设计并实现了一种基于软件通信架构(Software Communication Architecture, SCA)的软件平台及其环境工具,解决了机载平台软件的分布式通信、资源调度管理、系统建模等技术问题,从而实现功能、应用和波形的组件化与动态重构。测试验证与工程应用情况表明,软件平台能够满足机载领域信号、信息处理强实时、高可用的应用需求,可有效提升综合射频系统软件开发质量与集成联试效率。 相似文献
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