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This paper proposes an alternative to the conventional public transport tracking systems which uses GPS. The proposed model uses LoRa wireless transmission to communicate between the bus stops and a base station. The buses are equipped with RF transmitters, which sends out data regarding the bus identity, continuously. RF receivers placed in the bus stop, detects this bus when it is in range, and...
This paper reviews a set of architecture and circuit techniques that have enabled data rates beyond 10Gb/s, and explores a range of design challenges and considerations as we move to higher data rates. In particular, we review ADC-based designs and their challenges and tradeoffs, including ADC resolution, oversampling ratio, and power consumption.
This paper presents a new transceiver for impulse radio ultra-wideband (IR-UWB) systems. This work is related to CHIST-ERA SMARTER project (Smart Multifunctional Architecture and Technology for Energy aware wireless sensoRs) which address autonomous wireless sensors nodes. The ultra low-power transceiver consists of an on-off keying (OOK) modulator/demodulator and a pulse generator. To reduce power...
This paper reviews trends for ultra-low-power wireless transceiver system and integrated circuit design under the perspective of using cost-effective CMOS technology nodes. These efficient transceiver structures typically find application in devices such as fitness monitors and other wearable healthcare devices, Internet of Things (IoT) devices and generic sensor nodes. A brief overview of State-of-the-Art...
Nowadays, if one purchases a communication device it is typically equipped with a few network interfaces. Similarly, a professional service in the Internet is run via a couple of interfaces to avoid a single point of failure. Despite the existence of many transmission paths, most of data is expedited and received by the same interfaces. The remaining ones serve as backup only, according to the premises...
In this paper, we propose a non-orthogonal random access (NORA) technique for the uplink 5G networks, in which user equipments (UEs) make use of the channel inversion so that their received power at the base station (BS) can satisfy a certain threshold condition. In particular, each UE opportunistically adjusts its transmit power according to its channel gain. We also mathematically analyze the system...
Typical Global Positioning System (GPS) receivers, which are increasingly used in many areas, consume too much energy due to heavy processing in a long time. This makes them not useful and sometimes even impractical for applications with high mobility or operating in obstructed regions where the GPS signal is present in short time. To address the problem, we propose a new design for a fast GPS receiver...
Automatic gain control (AGC) circuit is the core of underwater acoustic signal receiver, and low power consumption and low noise are its development direction and research hotspot. In this paper, the basic design principle of automatic gain amplifier is analyzed, and the various implementation methods of AGC are analyzed. The advantages and disadvantages of various methods are compared and analyzed...
Ad-hoc Wi-Fi is well known in disaster communications systems, because of its ability to form infrastructure-free peer-to-peer networks. However, ad-hoc Wi-Fi has a major disadvantage due to the lack of coordinating infrastructure: Its energy consumption is very high, reducing battery life to as little as 1.5 hours. Thus, while it would be highly desirable for mobile phones to use ad-hoc Wi-Fi communications...
This work presents an ultra-low power event driven wake-up receiver (WuRx) fabricated in a RF CMOS 130 nm process. The receiver consists of an off-chip lumped element matching network, an envelope detector, a decision circuit capable of detecting sub-mV baseband signal voltages and a clock source consuming 1.3 nW. This receiver has demonstrated a sensitivity of −72 dBm while consuming a total of 8...
Wireless interconnects are capable of establishing energy-efficient intra and inter-chip data communications. This paper introduces a circuit level design of an energy-efficient millimeter-wave (mm-wave) non-coherent on-off keying (OOK) receiver suitable for such wireless interconnects in 45-nm CMOS process. The receiver consists of a simple two-stage common source structure based Low Noise Amplifier...
This paper presents an overview of the design considerations and challenges of event-driven wakeup receivers as well as an analysis of state-of-the-art (SOA) research. We consider advantages and disadvantages of the commonly utilized architectures in these systems as well as presenting big picture perspectives from an application standpoint. This paper focuses on event-driven scenarios where the activity...
This paper presents a 10-Gb/s power-efficient serial-link transceiver for the Internet-of-Everything applications. The proposed transceiver employs several techniques to reduce the power consumption. This includes the use of forward clocking with a simplified clock recovery scheme, multiplexing the transmitted signal at the output of voltage-mode drivers, and using modified slicers in the receiver...
We propose the use of differential code shift keying (DCSK) for a symbol rate adaptive low-complexity DSP algorithm by eliminating adaptive-equalizer (AEQ) with limited influence on circuit size. As a proof of concept, a 300km transmission using DCSK format was demonstrated without using AEQ.
This paper presents the design of an Ultra Low Power (ULP) inductorless Low Noise Amplifier (LNA) based on a Common Gate (CG) architecture using the back gate control of the Fully-Depleted Silicon-On-Insulator (FDSOI) technology. It demonstrates the potential of the back biasing to lower the power consumption of more than 30 % compared to a design without back biasing, while keeping similar performance...
In this paper, we consider the balance between the energy efficiency (EE) and the short-term fairness among individual users in a muiticell MISO downlink. Firstly, the power consumption and sum proportional rate are utilized jointly to construct an objective function. Then a transmit beamformer optimization problem for the objective maximization subject to transmit power constraints is formulated...
In this paper, a novel broadcast protocol is proposed for the receiver initiated transmission (RIT) media access control (MAC) protocol based wireless smart utility network (Wi-SUN) systems. The RIT protocol adopted by IEEE 802.15.4e achieves the low power consumption by switching the short wake-up state and the long sleep state, however, the protocol does not support broadcasting because terminals...
Due to the large swath of available bandwidth, millimeter wave (mmWave) spectrum is potentially suitable to meet enhanced network capacity requirements of future generation communication systems. However, the high Analog to Digital Converter (ADC) sampling rate required to process wide band signals in the mmWave regime results in significant power consumption in the receiver hardware. In this work,...
RF energy harvesting (RFEH) is a promising technology for energy requirements of wireless communication nodes. However, providing sufficient amount of energy to ensure self-sufficient devices based on RFEH may be challenging. In this paper, the use of diversity combining in RFEH systems is proposed to increase the amount of harvested energy. The power consumption of diversity combining process is...
In this paper, we address the energy efficiency (EE) optimization problem for SWIPT multiple-input multiple-output broadcast channel (MIMO-BC) with time-switching (TS) receiver design. Our aim is to maximize the EE of the system whilst satisfying certain constraints in terms of maximum transmit power and minimum harvested energy per user. The coupling of the optimization variables, namely, transmit...
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