A 2.4GHz CMOS Monolithic Transceiver Front-End for IEEE 802.11b Wireless LAN Applications

A 2. 4GHz CMOS monolithic transceiver front-end for IEEE 802. llb wireless LAN applications is presented. The receiver and transmitter are both of superheterodyne structure for good system performance. The frontend consists of five blocks., low noise amplifier,down-converter, up-converter, pre-amplifier, and LO buffer. Their input/output impedance are all on-chip matched to 50 Ω except the down-converter which has open-drain outputs. The transceiver RF front-end has been implemented in a 0. 18μm CMOS process. When the LNA and the down-converter are directly connected, the measured noise figure is 5.2dB, the measured available power gain 12. 5dB, the input l dB compression point --18dBm,and the third-order input intercept point --7dBm. The receiver front-end draws 13.6mA currents from the 1.8V power supply. When the up-converter and pre-amplifier are directly connected, the measured noise figure is 12.4dB, the power gain is 23. 8dB, the output ldB compression point is 1.5dBm, and the third-order output intercept point is 16dBm. The transmitter consumes 27.6mA current from the 1.8V power supply.

Ultra-Low Power 1 Volt Small Size 2.4 GHz CMOS RF Transceiver Design for Wireless Sensor Node

Ultra-low power transceiver design is proposed for wireless sensor node used in the wireless sensor network（WSN）.Typically,each sensor node contains a transceiver so it is required that both hardware and software designs of WSN node must take care of energy consumption during all modes of operation including active/sleep modes so that the operational life of each node can be increased in order to increase the lifetime of network.The current declared size of the wireless sensor node is of millimeter order,excluding the power source and crystal oscillator.We have proposed a new 2.4 GHz transceiver that has five blocks namely XO,PLL,PA,LNA and IF.The proposed transceiver incorporates less number of low-drop outs（LDOs）regulators.The size of the transceiver is reduced by decreasing the area of beneficiary components up to 0.41 mm;of core area in such a way that some functions are optimally distributed among other components.The proposed design is smaller in size and consumes less power,<1 mW,compared to other transceivers.The operating voltage has also been reduced to 1 V.This transceiver is most efficient and will be fruitful for the wireless networks as it has been designed by considering modern requirements.

Low Power Transceiver Design Parameters for Wireless Sensor Networks

Designing low power sensor networks has been the general goal of design engineers, scientist and end users. It is desired to have a wireless sensor network (WSN) that will run on little power (if possible, none at all) thereby saving cost, and the inconveniences of having to replace batteries in some difficult to access areas of usage. Previous researches on WSN energy models have focused less on the aggregate transceiver energy consumption models as compared to studies on other components of the node, hence a large portion of energy in a WSN still get depleted through data transmission. By studying the energy consumption map of the transceiver of a WSN node in different states and within state transitions, we propose in this paper the energy consumption model of the transceiver unit of a typical sensor node and the transceiver design parameters that significantly influences this energy consumption. The contribution of this paper is an innovative energy consumption model based on simple finite automata which reveals the relationship between the aggregate energy consumption and important power parameters that characterize the energy consumption map of the transceiver in a WSN;an ideal tool to design low power WSN.

FPGA Based Wireless Multi-Node Transceiver and Monitoring System

In recent years the variety and complexity of Wireless Sensor Network （WSN） applications, the nodes and the functions they are expected to perform have increased immensely. This poses the question of reducing the time from initial design of WSN applications to their implementation as a major research topic. RF communication programs for WSN nodes are generally written on microcontroller units （MCUs） for universal asynchronous receiver/transmitter （UART） data communication, however nowadays radio frequency （RF） designs based on field-programmable gate array （FPGA） have emerged as a very powerful alternative, due to their parallel data processing ability and software reconfigurability. In this paper, the authors present a prototype of a flexible multi-node transceiver and monitoring system. The prototype is designed for time-critical applications and can be also reconfigured for other applications like event tracking. The processing power of FPGA is combined with a simple communication protocol. The system consists of three major parts： wireless nodes, the FPGA and display used for visualization of data processing. The transmission protocol is based on preamble and synchronous data transmission, where the receiver adjusts the receiving baud rate in the range from min. 300 to max. 2400 bps. The most important contribution of this work is using the virtual PicoBlaze Soft-Core Processor for controlling the data transmission through the RF modules. The proposed system has been evaluated based on logic utilization, in terms of the number of slice flip flops, the number of 4 input LUTs （Look-Up Tables） and the number of bonded lOBs （Input Output Blocks）. The results for capacity usage are very promising as compared to other similar research.

基于单片机的无线通信系统设计

针对有线网络存在布线麻烦、故障处理难度大、维护烦琐等问题,结合无线通信技术,文章设计了基于单片机的无线通信系统。系统采用AT89S51单片机与无线收发模块pt2262和pt2272实现无线通信控制,能够清晰显示设备运行状态,实现电机旋转的远程控制。通过测试,该系统设计合理,操作简单,运行稳定可靠,具有良好的应用价值。

基于多网合一的无线室内分布系统设计

文章提出一种基于多网合一的无线室内分布系统设计,简单分析多网合一模式后,探讨室内无线分布系统中应用多网合一模式的意义。然后分析收发分缆合路方式、合用天馈收发合缆方式下的多网合一室内无线分布系统设计方式,探讨当下多网合一期间广泛存在的不同设备频率匹配问题和信号干扰问题,为其他研究人员开展无线室内分布系统设计工作提供借鉴。

WIRELESS FLOPPY DISK DRIVE USING TURBO CODEC IN HOME AND OFFICE WIRELESS LAN

A wireless floppy disk drive is proposed for home and office wireless local area network. The proposed floppy drive uses turbo coding-decoding in the transceiver PHYsical layer (PHY) to improve system performance. The data transmission rate is about 11 Mbps. The covered distance is 30 meters in obstructed environment and 100 m in free space.

A 16-QAM 45-Gbps 7-m Wireless Link Using InP HEMT LNA and GaAs SBD Mixers at 220-GHz-Band

This paper presents a 220-GHz-band 7-m wireless link with a 45-Gbps transmission data rate by using 16 quadrature amplitude modulation(16-QAM).Super-heterodyne transceiver modules are developed for transmission and reception of the modulated signals,which consist of a Schottky barrier diodes(SBD)based sub-harmonic mixer(SHM),an InP HEMT low noise amplifier(LNA),a waveguide band-pass filter(BPF),and a 108-GHz local oscillator(LO)multiplier chain.The transmitter features a peak transmit power of 1.41 dBm,and the IF frequency varies from 5 GHz to 20 GHz.Besides,the receiver features a conversion gain of 9.3 dB in average and a noise temperature of 3052.8 K.The measured results indicate that the transceiver modules enable data transmission of a 45-Gbps 16-QAM signal with Signal-Noise-Ratio(SNR)from 11.59 dB to 15.36 dB in a 7-m line-of-sight channel.

Simultaneous wireless information and power transfer with fixed and adaptive modulation

Activating Wireless Power Transfer (WPT) in Radio-Frequency (RF) to provide on-demand energy supply to widely deployed Internet of Everything devices is a key to the next-generation energy self-sustainable 6G network. However, Simultaneous Wireless Information and Power Transfer (SWIPT) in the same RF bands is challenging. The majority of previous studies compared SWIPT performance to Gaussian signaling with an infinite alphabet, which is impossible to implement in any realistic communication system. In contrast, we study the SWIPT system in a well-known Nakagami-m wireless fading channel using practical modulation techniques with finite alphabet. The attainable rate-energy-reliability tradeoff and the corresponding rationale are revealed for fixed modulation schemes. Furthermore, an adaptive modulation-based transceiver is provided for further expanding the attainable rate-energy-reliability region based on various SWIPT performances of different modulation schemes. The modulation switching thresholds and transmit power allocation at the SWIPT transmitter and the power splitting ratios at the SWIPT receiver are jointly optimized to maximize the attainable spectrum efficiency of wireless information transfer while satisfying the WPT requirement and the instantaneous and average BER constraints. Numerical results demonstrate the SWIPT performance of various fixed modulation schemes in different fading conditions. The advantage of the adaptive modulation-based SWIPT transceiver is validated.

A 2Mbps Human Body Communication Transceiver Based on Body Antenna Effect

This paper presents a human body communication(HBC)transceiver for wireless body network applications.The transceiver employs on frequency shift keying(FSK)modulation and op-erates in 40 MHz-60 MHz which is the resonant frequency of the human body as an antenna.It achieves high performance and stability through establish passive microstrip line and via models and active device-models.The proposed transceiver is designed and fabricated by FR4 printed cir-cuit board(PCB)process,the transceiver has the ability of configurable data rate up to 2 Mbps and it achieves-86 dBm receiving sensitivity at 2 Mbps data rate.Meanwhile,the transceiver out-put power dynamics range is 34 dB.Furthermore,with a visual interaction interface,the transceiv-er can be agility use in a variety of scenarios.Its measurements are verified on human body.The result shows that the transceiver has ability to send data from person to person by relying on hu-man body antenna radiation.The transceiver shows great prospect in wireless body area networks(WBAN)for telemedicine and emergency communication.

A Novel Transceiver Architecture Based on Wavelet Packet Modulation for UWB-IR WSN Applications

In last few years, several recent developments concern a new proposed techniques of communication for WSN (Wireless Sensors Network) using a complex methods and technics. This network is considered a future platform for many applications like: medical, agriculture, industrial, monitoring and others. The challenge of this work consists in proposing a new design of transceiver for WSN based on IDWPT (Inverse Discrete Wavelet Packet Transform) in emitter and DWPT (Discrete Wavelet Packet Transform) in receiver for mono and multi users using AWGN Channel. We will propose in this paper, a new concept of impulse radio communication for multiband orthogonal communication for UWB (Ultra-wideband) applications. The main objective of this work is to present a new form of pulse communication adapted to low through-put short-range applications and is scalable according to the type of use but also the number of sensors.

用于5G多波束MIMO系统的先进低温共烧陶瓷封装的39 GHz双信道收发器芯片组

本文介绍了一种用于5G多输入多输出(MIMO)应用的39 GHz收发器前端芯片组。每个芯片包括两个可变增益的频率转换通道,可以同时支持两个独立波束,芯片还集成了一个本地振荡器链和数字模块,用于多芯片扩展和增益状态控制。为了提高射频性能,对前端系统的关键模块提出了几种电路级改进技术。此外,开发了一种先进的低温共烧陶瓷工艺来封装39 GHz双通道收发器芯片组,实现了低封装损耗和两个发射(TX)/接收(RX)通道之间的高隔离。进行了芯片级和系统级封装(SIP)测量,以演示收发器芯片组的性能。测量结果表明,TX SIP的最大增益为11 dB,饱和输出功率为10 dBm;RX SIP的最大增益为52 dB,噪声系数为5.4 dB,输出压缩点为7.2 dBm。该收发器的单通道通信链路测试表明,64正交调幅(QAM)调制的误差矢量幅度(EVM)为3.72%,频谱效率为3.25 bit·s^(−1)·Hz^(−1);256-QAM调制在1 m距离上的误差矢量幅度(EVM)为3.76%,频谱效率为3.9 bit·s^(−1)·Hz^(−1)。基于该芯片组,还开发了39 GHz多波束原型,用于执行5G毫米波应用的MIMO操作。单流和双流传输的空中通信链路表明,多波束原型机可以覆盖5~150 m的距离,吞吐量相当。

基于激光雷达技术的轻便型电力巡检系统研究

针对当前系统无法获得理想的电力巡检结果等问题,设计了基于激光雷达技术的轻便型电力巡检系统。采用激光雷达扫描仪测量激光发射点与目标间距离,参考激光器高度与扫描角度确定地面光斑三维坐标,得到电力系统区域地形地貌与塔杆与线路等信息;利用差分GPS/捷联式惯导获取自身坐标、偏航角与速度等相关信息,通过预瞄PID与人工势场实现系统导航功能,在单片机控制下,采用自适应多叉树防碰撞算法防止巡检单元与周边物体碰撞,测试结果表明,该系统能够直观观察巡检目标,在不同场地环境下均可精确控制自身航向角。

智能送药小车设计

针对医疗行业正在向着智能化、自动化方向发展的需求,设计了一个基于STM32F103RCT6的智能送药小车系统。系统采用3节18650锂电池供电;通过OpenMV图像识别模块,识别病房号;通过TSL1401线阵线性CCD模块实现小车的循迹;通过HX711称重传感器模块读取药品的实时重量;通过2.4G Zigbee CC2530串口无线收发模块实现两小车的通信;通过0.96寸OLED显示识别的病房号及往返时间等。实践表明,系统性能良好,可靠性高,有一定的应用价值。

CMOS phase-locked loops in ISSCC 2023

High-performance phase-locked loops(PLL)are widely used in modern system-on chips(So C)including the ultrahigh-speed wireless/wireline communication(e.g.5G/6G transceivers,over-100-Gbps Ser Des transceivers),high resolution mm-wave radars,ultra-low power internet-of-thing(Io T),and high-sampling-rate data converters.In the 2023 IEEE International Solid-State Circuits Conference(ISSCC 2023).

基于单片机的病房呼叫与监测系统设计与实现

对传统人工呼叫或有线式病房呼叫系统进行研究,设计了一款可无线传输病床呼叫信息以及环境温度的病房呼叫和监测系统。详细介绍该系统的整体设计、硬件系统、软件系统。最终通过NRF24L01无线传输模块采集病床呼叫信息和环境温度,传送到主机实现声光报警并在LCD屏上显示病床号和病房温度,医护人员可按下呼应键响应。该系统创新点在于实现数据的无线传输和对病房温度的实时监测。

基于2.4G无线收发模块的低成本农业物联网节点软件设计

针对传统物联网通信中广距离和低成本无法兼备的问题,设计了基于2.4G无线收发模块的低成本农业物联网节点软件,并开发了自动组网程序。从机具备通信和数据传输的双重功能,从而节省网关配置,降低设备成本。通过软硬件组态,实现对农业生产的远程监控。结果表明,该软件具备低成本、广覆盖的特点,具备满足智慧农业远程监控和精准种植需求的功能。

K波段紧凑型收发前端组件的设计

设计了一种应用于微波无线通信系统的紧凑型低成本FDD收发前端组件,在有限的体积内集成了一路接收通道、一路发射通道、两组变频需要的本振源。采用表面贴装芯片和微波多层板的实现方式,在保证优良性能的同时,兼顾了经济性和装配容易性。首先介绍了收发前端的架构设计,并针对关键无源电路、有源电路进行了详细设计,对主要性能指标进行了分析。对加工的组件进行了实测,发射通道输出功率大于20 dBm,接收信号范围为-60 dBm~-20 dBm,接收中频输出功率恒定为-10 dBm。

CMOS无线体域网收发机集成电路滤波方法研究

电流波动是在电路中经常会遇到的问题,特别是在移动设备和传感器等应用中,电路的稳定性对设备运行的稳定性和可靠性有直接的影响。为了更好的降低电流波动,提出CMOS无线体域网收发机集成电路滤波仿真。构建互补金属氧化物半导体(Complementary Metal-Oxide-Semiconductor,CMOS)无线体域网收发机集成电路模型,通过分离集成电路中有功和无功电流的方法检测电路谐波,根据谐波特点实现滤波器的设计;基于滤波器设计原理、截止频率范围、范数、负荷容量以及稳定性,完成滤波器的设计,达到集成电流滤波仿真的目的。实验结果表明,所提方法对于CMOS无线体域网收发机集成电路中的电流波动滤波效果好。