Receive Space-Time Filter and Transmit Sequence Design in MIMO Radar Systems

Wireless Personal Communications - In this paper, we are going to joint design of the continuous/discrete phase transmit waveform and receive space-time filter to maximize the Signal to...     

Robust Joint Design of Transmit Beamforming and Receive Filter for TB-MIMO STAP Radar

In this paper, we consider the joint design of transmit beamforming and receive filter for transmit beamspace (TB) multiple-input multiple-output (MIMO) radar red space-time adaptive processing (STAP) under the target information uncertainty. The associated robust joint design problem is formulated by maximizing the signal-to-interference-plus-noise ratio (SINR) to guarantee the target detection performance. An iterative optimization procedure is developed to resolve the NP-hard joint design problem. The optimized transmit beamforming weight vector and receive filter exhibit superior performance in terms of output SINR. Several simulation examples are presented to demonstrate the effectiveness of the proposed algorithm.

     

T／R组件核心技术最新发展综述（一）

以固态T／R组件为核心的有源相控阵（AESA）技术在雷达、电子战、制导武器和通信等领域都得到了广泛应用。T／R组件的成本约占整个相控阵雷达系统造价的60％,是固态有源相控阵雷达的核心。首先阐述了有源相控阵雷达T／R组件中的关键技术——GaAsMMIC技术和微波MCM技术,同时对T／R组件的最新发展现状及趋势进行了分析,以此来推动我国有源相控阵技术的快速发展。     

An X-Band AlGaN/GaN MMIC Receiver Front-End

This letter presents an integrated AlGaN/GaN X-band receiver front-end. This is to the authors knowledge the first published results of an integrated AlGaN/GaN MMIC receiver front-end. The receiver uses an integrated SPDT switch to reduce size, weight and cost compared to circulator based transceiver front-ends. The integrated front-end has more than 13 dB of gain and a noise figure of 3.5 dB at 11 GHz.      

X波段测高雷达展开法解距离模糊算法设计

雷达信号处理的根本目的是从杂波中提取运动目标,为此必须抑制地杂波和动杂波,同时保证运动目标输出。本文首先从杂波抑制着手,研究X波段测高雷达脉冲重复频率的设计,在此基础上设计一种解距离模糊的展开算法。     

红外遥控发/收数据通信系统的EDA实现

分析了红外线遥控系统的数据编码和传输机制;设计了基于红外线的数据发送和接收系统;用VerilogHDL语言设计了信号编/解码核心电路,外围电路包括红外发/收器件、晶振、显示电路等;在ModelSim6.2仿真工具中进行了仿真测试;用Xilinx ISE9.1软件进行了综合、适配和FPGA器件下载测试,并用Agilent 16823A逻辑分析仪进行了数据采集显示验证,结果表明该电路实现了数据发送和接收功能,符合红外遥控数据传输协议.     

瑞利衰落信道下最大比发射联合选择接收技术的性能分析

本文设计了一种新的MIMO传输技术,它在发射端(基站)按最大比发射(MRT),接收端则基于信噪比最大的原则仅选择一根接收天线来处理信号,记MRT/RAS.其目标就是为了提高系统性能并降低接收端(移动台)的硬件复杂度.根据随机矩阵和排序统计的最新理论,推导出瑞利衰落信道下MRT/RAS系统的中断概率、误码率(BER)等性能指标的确切表达式.仿真结果表明MRT/RAS系统可以取得很好的阵列增益及满分集增益.仿真试验也证明了分析结果的正确性.     

Design and Analysis of Transmit/Receive Switch in Triple-Well CMOS for MIMO Wireless Systems

This paper presents the design and analysis of an RF transmit/receive switch in CMOS for multiple-input multiple-output (MIMO) wireless systems. First, both full-range and abridged quad-pole quad-throw (4P4T) switch architectures for MIMO systems with four antenna elements are comparatively studied. The full-range 4P4T switch is selected for circuit implementation because of its more switching states and lower insertion loss. The series connection and body-floating techniques are then employed in the circuit design to achieve an acceptable performance. Fabricated in 0.12-mum triple-well CMOS with an effective die area 0.35times0.19 mm², the 4P4T switch exhibits less than 2.7-dB insertion loss and higher than 20-dB isolation over the frequency range from 2 to 10 GHz. It also attains measured power-handling capability more than 25 dBm at 2.4 and 5.8 GHz     

数字通用接收机及其在基本雷达/雷达干扰实验中的应用

"雷达"系列课程的教学,需要有一套有实用而有效的实验手段,基本雷达/雷达干扰实验系统满足了这一要求.数字通用接收机是这套系统中的核心单元,文中着重介绍了基于ADSP21262的实验用通用数字雷达接收机设计.     

基于GaAs PHEMT的5～12 GHz收发一体多功能芯片

基于GaAs赝高电子迁移率晶体管(PHEMT)工艺,研制了一种5～ 12 GHz的收发一体多功能芯片(T/R MFC),其具有噪声低、增益高和中等功率等特点.电路由低噪声放大器和多个单刀双掷(SPDT)开关构成.为了获得较低的噪声系数和较大的增益,低噪声放大器采用自偏置三级级联拓扑结构;为了获得较高的隔离度和较低的插入损耗,SPDT开关采用串并联结构.测试结果表明,在5～ 12 GHz频段内,收发一体多功能芯片的小信号增益大于26 dB,噪声系数小于4 dB,输入/输出电压驻波比小于2.0,1 dB压缩点输出功率大于15 dBm.其中,放大器为单电源5V供电,静态电流小于120 mA;开关控制电压为-5 V/0 V.芯片尺寸为2.65 mm×2.0 mm.     

蓝牙基带协议中发送与接收定时的研究

本文对蓝牙基带中定时的实现过程以及如何进行信道控制进行了详细的论述。     

T/R组件中金丝键合的仿真与优化

金丝键合是微波多芯片T/R组件中实现IVRvlIC芯片电气互连的关键技术,键合的金丝直径,跨距、拱高和数目对组件的微波传输特性具有很大的影响.本文对金丝键合的等效电路模型进行了分析,并采用三维电磁场仿真软件HFSS对金丝键合进行建模分析和仿真优化,最终得出最优结果.     

A Single-Ended Fully Integrated SiGe 77/79 GHz Receiver for Automotive Radar

A single-ended 77/79 GHz monolithic microwave integrated circuit (MMIC) receiver has been developed in SiGe HBT technology for frequency-modulated continuous-wave (FMCW) automotive radars. The single-ended receiver chip consists of the first reported SiGe 77/79 GHz single-ended cascode low noise amplifier (LNA), the improved single-ended RF double-balanced down-conversion 77/79 GHz micromixer, and the modified differential Colpitts 77/79 GHz voltage controlled oscillator (VCO). The LNA presents 20/21.7 dB gain and mixer has 13.4/7 dB gain at 77/79 GHz, and the VCO oscillates from 79 to 82 GHz before it is tuned by cutting the transmission line ladder, and it centres around 77 GHz with a tuning range of 3.8 GHz for the whole ambient temperature variation range from $- hbox{40},^{circ}{hbox{C}}$ to $+ hbox{125},^{circ}{hbox{C}}$ after we cut the lines by tungsten-carbide needles. Phase noise is $-$90 dBc/Hz@1 MHz offset. Differential output power delivered by the VCO is 5 dBm, which is an optimum level to drive the mixer. The receiver occupies 0.5 ${hbox{mm}}^{2}$ without pads and 1.26 ${hbox{mm}}^{2}$ with pads, and consumes 595 mW. The measurement of the whole receiver at 79 GHz shows 20–26 dB gain in the linear region with stable IF output signal. The input ${rm P}_{rm 1dB}$ of the receiver is $-$35 dBm.      

一种无源探测与跟踪雷达时差接收机

较详细分析了无源探测与跟踪雷达时差接收机的主要性能指标对时差测量精度的影响,提出了一种自适应门限测量法,并给出了一种基于航管二次雷达信号的窄带时差接收机的方案设计。     

一种用于机载雷达告警接收机的主分选算法

机载雷达告警接收机作为一种雷达侦察设备,主要用于对高威胁雷达目标识别和告警,而识别的前提是信号的分选。针对传统主分选算法计算量大、自动化程度不高、无法满足机载雷达告警接收机实时分选需要的现状,提出一种基于幅度预处理和脉冲重复周期(PRI)转移矩阵的主分选算法,通过仿真实验验证了该算法的有效性。     

A Transmit and Receive Multi-Antenna Channel Model and Simulator for Communications from High Altitude Platforms

The interest of the scientific and industrial communities on the application of high altitude stratospheric platforms to communications is increasingly growing. Several research projects and field trials are being carried out by international consortia and specific portions of the electromagnetic spectrum have been allocated by the International Telecommunications Union (ITU) for communications applications. The channel experienced by such systems plays a key role for the provision of reliable communications services but, unfortunately, its inherent characteristics are substantially different from those of other channel typologies. Therefore, in order to design and simulate effective propagation impairment mitigation techniques such as adaptive modulation and coding or adaptive beamforming and equalization algorithms, an ad hoc channel model and simulator is definitively required. In this paper a novel channel model and a related channel simulator especially tailored for HAP-based communication systems are presented. The model is conceived for link-level simulations of point-to-point communication links, wherein both the transmitter and the receiver may be equipped with an array of antennas. Peculiar physical effects of the stratospheric channel are taken into account as well as impairments due to the possible presence of scatterers and relative movement of both transmitting and receiving stations. The structure of the channel simulator has been conceived to maintain the computational burden at required by the channel simulator is kept low by an efficient tapped delay line implementation. This work is supported by the CAPANINA project (FP6 IST-2003-506745): Communications from aerial platform networks delivering broadband communications for all, http://www.capanina.org.

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单脉冲雷达接收机DAGC设计

自动增益控制（AGC）电路是单脉冲雷达实现精确目标跟踪的重要组成部分。通过对比、分析两种不同的AGC设计方法,提出了一种可用于单脉冲雷达接收机增益控制的数字AGC设计方案,并利用高速A/D、D/A芯片、现场可编程逻辑门阵列等集成器件设计了单脉冲雷达接收机的数字增益控制电路。     

Digital Receiver for Laser Imaging Radar

Theoretical basis of the transmitter and high sensitivity receiver design and the problem of waveform design for diode laser imaging radar had been discussed in the past[1] . However, with the extension of the application domains, there are some important technical problems, such as, how to increase the active range of the laser imaging radar system in the applied situation of the both limited maximum power of laser and limited maximum size of system. Another important problem of them is the s…