5G低功耗通感融合半实物验证系统的设计与开发

随着5G的快速商用，世界范围内也已经逐步开展了面向5G-Advanced/6G的关键技术和潜在应用研究。在以往无线通信系统研究中，软件仿真对评估关键技术和系统性能具有重要作用，但软件仿真无法体现真实无线环境对系统的影响。相比软件仿真，基于软件定义无线电技术的半实物平台可以工作在实际无线环境，评估真实信道条件下无线通信系统性能。主要研究了基于5G半实物平台的低功耗通感融合系统的设计与开发。5G半实物平台包含基于第三代合作伙伴计划（3GPP）标准开发的5G半实物基站和5G半实物终端，基站和终端之间通过空口实现数据传输。通过结合5G信号和反向散射通信设计低功耗感知系统，实现人员检测功能，为后续5G-Advanced/6G的实际应用提供了初步验证。     

中软牛无线电的应用分析

软件无线电随着无线通信系统的发展有着越来越多的应用空间和应用的必要性。本文简单介绍了软件无线电概念及特点．3G实现的关键技术,并对-3G中软件无线的应用和实现进行了分析。     

中软牛无线电的应用分析

软件无线电随着无线通信系统的发展有着越来越多的应用空间和应用的必要性。本文简单介绍了软件无线电概念及特点．3G实现的关键技术,并对-3G中软件无线的应用和实现进行了分析。     

3G中软件无线电的应用分析

软件无线电随着无线通信系统的发展有着越来越多的应用空间和应用的必要性.本文简单介绍了软件无线电概念及特点,3G实现的关键技术,并对3G中软件无线的应用和实现进行了分析.     

软件无线电技术在3G中的应用

文章首先概括地介绍了软件无线电的概念、实现的体系结构和关键技术,然后针对3G标准的大带宽、高速率、多媒体要求以及采用智能天线、多用户检测、Turbo码等技术带来的挑战,重点讨论了3G系统中采用软件无线电技术的难点及当前的进展情况。     

软件无线电技术在无线通信系统中的应用

无线通信系统往往采用不同的制式、工作在不同的频段，因此无法互通和兼容。软件无线电技术通过构造一个具有开放性、标准化、模块化的通用硬件平台，用软件来完成各种功能，可用于研制具有高度灵活性和开放性的新一代无线通信系统。介绍了软件无线电的基本结构和关键技术．然后分别叙述了软件无线电在cdmax 1x基站和3G中的应用，最后指出了软件无线电技术在3G中的重要性。     

基于FPGA和System Generator的软件无线电处理系统设计

本文介绍了软件无线电的定义,并在原理组成上阐述了实现的途径,描述了Xilinx公司在MATLAB的Simulink平台上设计的新型工程开发平台System Generator。实际运用中利用System Generator实现软件无线电的各个模块功能,最后在System Generator中设计无线频谱监测系统的具体工程,利用仿真验证结果。     

基于软件无线电的同步技术研究

从软件无线电理论出发,分析讨论了软件无线电的关键技术,软件无线电接收机的数学模型.针对现代通信领域出现的多模式、多频段共同存在和使用的形势,提出了合理的基于软件无线电思想的多模式通信系统.在Matlab仿真环境下,建立了包括TDMA、CDMA和OFDM三模通信系统平台,以最大似然估计同步算法为理论依据,结合各调制解调信号特点,重点解决了多模式通信平台的同步技术问题.     

SDR软件无线电系统产品介绍(二)

3.SDR-3000软件无线电数字收发机子系统 概述 FlexComm SDR-3000是纯软件无线电子系统,可支持几百个同时收发的信道,每个信道都包含一个独立的天线接口协议。Flex Comm SDR-3000平台几乎支持所有的天线接口标准,包括联合战术无线业务（JTRS）、机载通信结点（CAN）,以及各种2G和3G蜂窝标准如WCDMA等所需的全部波形。     

一种宽带中频数字化处理平台

为解决软件无线电领域无法实时处理宽带中频信号的问题,研究了软件无线电中频数字化处理技术的基础理论和关键技术。设计实现了基于CPCI架构的中频数字化处理平台,介绍该平台的设计原理,并给出平台所用器件的原理框图。借助摩托罗拉超短波电台调制信号,通过该平台上实现的数字下变频和基于正交解调的FM算法对该信号的成功处理,验证了该设计平台能够实时处理宽带中频信号。     

A Study of the Simulation Platform of WCDMA

1　IntroductionAtpresent,manydifferentsystemshavecoex istedinthedevelopmentofmobilecommunication .Thingshavegotmorecomplexinthedevelopmentof3Gthanever.Inadditiontothecoexistenceofmul tiplemobileschemes,anothercomplexityisthatthe3Gmustbecompatiblewiththe 2Gsystems.Soft wareDefinedRadio (SDR )orSoftWareRadio(SWR)isakindofnewwirelesscommunicationtechnology .Ithasbeenrecognizedasthenextmajorleapforwardinmobilecommunications.Particular ly ,itisabletoprovidetheseamlessconnectionbe tweenmanyex…     

Instructions and hardware designs for accelerating SNOW 3G on a software-defined radio platform

Software-defined radio (SDR) is a new technology transitioning from research into commercial markets. SDR moves hardware-dominant baseband processing of multiple wireless communication protocols into software on a single chip. New cellular standards, such as HSPA+, LTE, and LTE+, require speeds in excess of 40 Mbps. SNOW 3G is a new stream cipher approved for use in these cellular protocols. Running SNOW 3G in software on our SDR platform provides a throughput of 19.1 Mbps per thread for confidentiality and 18.3 Mbps per thread for integrity. To have secure cellular communications in SDR platforms for these new protocols, the performance of security algorithms must be improved. This paper presents instruction set architecture (ISA) extensions and hardware designs for cellular confidentiality and integrity algorithms using SNOW 3G. Our ISA extensions and hardware designs are evaluated for the Sandbridge Sandblaster^? 3011 (SB3011) SDR platform. With our new SNOW 3G instructions, the performance of confidentiality and integrity improve by 70 and 2%, respectively. For confidentiality, power consumption increased by 2%, while energy decreased by 40%. For integrity, power consumption remained consistent, while energy decreased by 2%.     

Analysis and implementation of six-port software-defined radio receiver platform

With recent advances in semiconductor processing technology and the development of reconfigurable devices, high bit-rate software-defined radio (SDR) has become practical for commercial applications. This paper proposes an SDR receiver platform based on a new substrate integrated waveguide six-port structure. This SDR receiver platform operates from 22 to 26 GHz and it is designed to be robust, low cost, and suitable for different communication schemes. In this study, the receiver is demonstrated to support quadrature phase-shift keying and 16 quadrature amplitude modulation schemes. System-level simulation is made and prototype circuits are fabricated to evaluate the system performance. It is found that the combination of SDR and six-port technology can provide a great flexibility in system configuration, a significant reduction in system development cost, and also a high potential for software reuse. The proposed receiver shows a possible application of universal direct demodulator for future SDR terminals in various wireless communication systems.     

Denial of Service Prevention for 5G

5G wireless mobile communication is expected to include a large number of advanced technologies in order to further increase bandwidth, Quality of Service (QoS), improve usability and security, decrease delays and cost of service. Software Defined Radio (SDR) will be the platform for advanced terminals. Our focus is security and especially prevention of Denial of Service (DoS) attacks which we believe will become more common in commercial networks through increasing availability of easy programmable SDRs. We propose a secret version of Adaptive Frequency Hopping, as a possible 5G technology in combination with others, with QoS estimation by means of physical layer parameters. The QoS parameter chosen is Bit Error Rate (BER) and this we use for blacklisting frequencies that we assume are under DoS attack. Our experimental results on BER estimation show this to be a promising approach.     

Programmable processor implementations of -best list sphere detector for MIMO receiver

An increasing number of standards in wireless communications have encouraged to study programmable processors as platforms for flexible receivers. A multiple-input multiple-output (MIMO) antenna system combined with orthogonal frequency division multiplexing (OFDM) technique has been introduced in many wireless communications standards, such as in the third generation long term evolution (3G LTE). The MIMO-OFDM system requires an efficient detector and a platform support for parallel processing of multiple subcarriers. A K-best list sphere detector (LSD) provides for near optimal decoding performance and a fixed throughput making it an interesting algorithm from the point of view of practical implementations.In this paper, we compare the implementations of the K-best LSD on four processor platforms: a digital signal processor (DSP), software defined radio (SDR), application-specific processor (ASP) and application-specific instruction-set processor (ASIP). The DSP is a popular very long instruction word (VLIW) device (TMS320C6455), the SDR processor employs multithreading and multiple cores (SB3500 core processor), the ASP is based on transport triggered architecture (TTA), while the ASIP is the SDR processor enhanced with a special instruction-set extension for sorting.A 2×2 MIMO antenna system with 64-quadrature amplitude modulation (64-QAM) is assumed. The chosen list sizes K=8 and 16 are based on simulation results carried out in MATLAB environment with the third generation long term evolution (3G LTE) parameters. The proposed ASIP achieved a promising throughput of 32.0 Mbps, where the software defined radio (SDR) implementation on the SB3500 core processor suffers from an inefficient software sorter. The ASP, in which the minimized hardware complexity has been the goal, achieves a throughput of 7.6 Mbps. However, more essential examination is related to the symbol time, which sets strict parallel processing requirements to the programmable processors.     

3G气象服务平台研究

参考发达国家移动多媒体服务3G技术和3G天气服务产品,分析当前公共气象服务的现状。结合公共气象服务的发展趋势,提出了临沂3G气象服务平台的基本架构,说明建设3G气象服务平台是切实可行的。创新地采用3G移动流媒体产品推送技术,实现无线传送流媒体。     

未来移动通信业务模型及架构

B3G时代的未来移动通信系统将是一个以用户为中心，提供个性化业务体验的开放融合的信息基础设施，因此面向B3G的业务模型及业务架构的研究对未来移动通信网络建设具有基础性指导作用。基于B3G演进趋势及业务特征，业务参考模型及业务架构可分解为业务支撑范围、业务能力定义和适配特征元素维度的三维业务参考模型，从而形成B3G分层业务架构；相应地，业务提供支撑技术包括虚拟归属环境（VHE）、业务支撑环境、业务能力开放、分布式计算、智能技术、轮廓（Profile）等。VHE体系在结合功能分布、能力开放粒度、智能元素支持、体系结构等方面的研究进行扩展后，将成为B3G时代业务提供的主流架构。     

3G业务开发平台的构建

提供丰富、便捷、质优价廉的业务是3G成功的关键,因此建立先进、高效、灵活的业务平台至关重要.论述了当前移动业务平台的局限性、未来3G目标业务平台的体系架构及其重要特征以及向该目标平台逐步演进的相关建议.     

Analyzing the Next Generation Software Defined Radio for Future Architectures

Commercial and research work in the field of software defined radio (SDR) has produced designs which have been able to deliver the efficiency and computational power needed to process 3G wireless technologies. Though efficient 3G processing has been achieved by these designs, next generation 4G SDR technology requires 10–1000x more computational performance but limits the power budget increase to 2–5x. In this paper, we present a breakdown of the major 4G kernels and analyze two methods of increasing performance and reducing power consumption. Specifically, we consider the effect of SIMD width and reduction in number of register file accesses on the performance and energy consumption of a SDR architecture, SODA. We show that by increasing SIMD width we can gain almost 2–8x performance increase while increasing total energy used by 1–2x for different SIMD widths. We also show that by reducing SIMD register accesses we can reduce the total energy used by 5–20% for the 4G kernels.     

基于虚拟机技术的入侵检测系统攻击仿真平台的研究和实现

攻击仿真平台是入侵检测系统(Intrusion Detectoin System,IDS)测试平台的核心组成部分。该文从攻击测试的角度,提出了一种基于虚拟机技术的IDS攻击仿真平台。首先介绍攻击仿真的测试目标和内容,并提出了攻击仿真系统和仿真平台的设计和实现的详细方案;同时,在此基础上,对该平台的设计和实现的3个关键技术:测试数据的选择、攻击技术的分类研究、攻击测试域及其划分等进行了进一步的分析,最后给出并分析了实验测试结果。