scholarly journals An Adaptive Framework for Real-Time ECG Transmission in Mobile Environments

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Kyungtae Kang
Keyword(s):  
Real Time ◽  
Perceived Quality ◽  
Wireless Channel ◽  
Ecg Monitoring ◽  
Mobile Environment ◽  
Reconstructed Signal ◽  
Channel Conditions ◽  
Adaptive Framework ◽  
Ecg Data

Wireless electrocardiogram (ECG) monitoring involves the measurement of ECG signals and their timely transmission over wireless networks to remote healthcare professionals. However, fluctuations in wireless channel conditions pose quality-of-service challenges for real-time ECG monitoring services in a mobile environment. We present an adaptive framework for layered coding and transmission of ECG data that can cope with a time-varying wireless channel. The ECG is segmented into layers with differing importance with respect to the quality of the reconstructed signal. According to this observation, we have devised a simple and efficient real-time scheduling algorithm based on the earliest deadline first (EDF) policy, which decides the order of transmitting or retransmitting packets that contain ECG data at any given time for the delivery of scalable ECG data over a lossy channel. The algorithm takes into account the differing priorities of packets in each layer, which prevents the perceived quality of the reconstructed ECG signal from degrading abruptly as channel conditions worsen, while using the available bandwidth efficiently. Extensive simulations demonstrate this improvement in perceived quality.

Design of Portable Electrocardiograph Monitoring System

2020 ◽  
Author(s):  
Jia Hua-Ping ◽  
Zhao Jun-Long ◽  
Liu Jun
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Data Storage ◽  
P Wave ◽  
Ecg Monitoring ◽  
The Public ◽  
Ecg Signals ◽  
Early Warning Mechanism ◽  
Timely Treatment ◽  
Ecg Data

Cardiovascular disease is one of the major diseases that threaten the human health. But the existing electrocardiograph (ECG) monitoring system has many limitations in practical application. In order to monitor ECG in real time, a portable ECG monitoring system based on the Android platform is developed to meet the needs of the public. The system uses BMD101 ECG chip to collect and process ECG signals in the Android system, where data storage and waveform display of ECG data can be realized. The Bluetooth HC-07 module is used for ECG data transmission. The abnormal ECG can be judged by P wave, QRS bandwidth, and RR interval. If abnormal ECG is found, an early warning mechanism will be activated to locate the user’s location in real time and send preset short messages, so that the user can get timely treatment, avoiding dangerous occurrence. The monitoring system is convenient and portable, which brings great convenie to the life of ordinary cardiovascular users.

QoS Support Mechanisms in WiMAX

2010 ◽  
pp. 330-346
Author(s):  
Maode Ma ◽  
Jinchang Lu
Keyword(s):  
Real Time ◽  
Packet Scheduling ◽  
Wireless Channel ◽  
Wireless Access Networks ◽  
Broadband Wireless ◽  
Wimax Networks ◽  
Real Time Traffic ◽  
Support Mechanisms ◽  
Time Varying Channel

Quality of service (QoS) provisioning is an important issue in the deployment of broadband wireless access networks e.g. WiMAX (IEEE Std 802.16-2004, 2004) networks with real-time and non-real-time traffic integrated. To design a QoS support framework tailored for WiMAX networks is more challenge as wireless channel has unique characteristics such as time-varying channel and limited channel capacity. This chapter presents various QoS support mechanisms in WiMAX networks. Existing proposals with the state-of-the-art technology have been classified into three main categories: QoS support architecture, bandwidth management mechanism, and packet scheduling schemes. Representative schemes from each of the categories have been evaluated with respect to major distinguishing characteristics of the WiMAX MAC layer and PHY layer as specified in the IEEE 802.16d standard. Suggestions and research trends on QoS support in WiMAX networks are highlighted.

scholarly journals Design and Implementation of a Low Cost Wireless Ambulatory ECG Monitoring System for Deployment in Rural Communities

2019 ◽  
Vol 15 (15) ◽  
pp. 57
Author(s):  
Hassan Ali ◽  
Ben Ernest Villaneouva ◽  
Raziq Yaqub
Keyword(s):  
Rural Communities ◽  
Real Time ◽  
Monitoring System ◽  
Low Cost ◽  
Ecg Monitoring ◽  
Ecg Signals ◽  
Design And Implementation ◽  
Ambulatory Ecg ◽  
Ambulatory Ecg Monitoring ◽  
Ecg Data

Due to the rising number of heart patients and the apparent need for more robust electrocardiogram (ECG) monitoring of these patients, hospitals are increasingly investing in typical cloud technology or centralized hospital server based remote ECG monitoring systems. However, the deployment these systems in rural communities is limited due to the high cost factor. To counter this challenge, in this paper, we focus on the design and implementation of a low cost real time wireless ambulatory ECG monitoring system. The detected ECG signals are first filtered and amplified and then digitally converted by a microcontroller. The digitized ECG signals are then sent over a ZigBee wireless link to a gateway personal computer (PC) at patient’s premises. The received ECG data from the ZigBee connection is displayed in real time via the National Instruments (NI) Laboratory Virtual Instrument Engineering Workbench (LabVIEW) user interface on the PC for instant personalized evaluation of the ECG data. The ECG data can be saved on the PC and sent via email to a remote cardiologist or a clinician. Additionally, the gateway PC at patient’s end acts as web server for sharing patient’s data over the Internet.  The remote off-site physician (medical staff in a hospital) can use a web browser on a PC, laptop or a mobile phone with Internet connection to access patient’s real time ECG trace for monitoring, expert review and diagnosis. It is shown that the system prototype allows users to acquire reliable ECG signals effectively and simply. The proposed ambulatory ECG system offers an alternative low cost deployment strategy and is especially suited for remote cardiac monitoring of patients in rural communities.

Remote Real-Time ECG Monitoring System Based on 3G Network

2013 ◽  
Vol 380-384 ◽  
pp. 794-797
Author(s):  
Yin Yang Zhang ◽  
Jie Sun ◽  
Chun Chen Zhao
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Ecg Monitoring ◽  
Embedded Control ◽  
The Real ◽  
3G Network ◽  
Real Time Transmission ◽  
Application Requirements ◽  
Design Proposal ◽  
Ecg Data

In order to meet the flexibility and real-time of the remote ECG monitoring system and other application requirements, a design proposal of a remote real-time ECG monitoring system based on 3G chip is presented in this paper. ARM9-based embedded control chip S3C2440 is chosen as the core and 3G module SIM5218 embedded TCP / IP protocol stack is used to transmit ECG data of the system which has functions of displaying the real-time ECG waveform and alarming. Thus, the real-time transmission of the large ECG data from the user to the monitoring center has been accomplished in this system. The research of the system provides convenience for the timely rescue of patients with cardiovascular disease.

scholarly journals Quality Aspects in Digital Broadcasting and Webcasting Systems: Bitrate versus Loudness

2017 ◽  
pp. 26-31
Author(s):  
Przemysław Gilski ◽  
Sławomir Gajewski ◽  
Jacek Stefański
Keyword(s):  
Real Time ◽  
Perceived Quality ◽  
User Preferences ◽  
Coding Efficiency ◽  
Quality Aspects ◽  
Digital Broadcasting ◽  
Subjective Study ◽  
Radio Programs ◽  
Objective Study

In this paper the quality aspects of bitrate and loudness in digital broadcasting and webcasting systems are examined. The authors discuss a survey concerning user preferences related with processing and managing audio content. The coding efficiency of a popular audio format is analyzed in the context of storing media. An objective study on a representative group of signal samples, as well as a subjective study of the perceived quality of real-time broadcasted and webcasted radio programs are performed.

Towards Layer Adaptation for Audio Transmission

2014 ◽  
Vol 6 (4) ◽  
pp. 35-41
Author(s):  
Jan Holub ◽  
Oldřich Slavata ◽  
Pavel Souček ◽  
Odysseas Zisimopoulos ◽  
Dimitris Toumpakaris ◽  
...  
Keyword(s):  
Signal To Noise Ratio ◽  
Rate Adaptation ◽  
Physical Layer ◽  
Wireless Channel ◽  
Audio Quality ◽  
Opinion Score ◽  
Constant Rate ◽  
Channel Conditions ◽  
Channel Errors

When audio is transmitted over the wireless channel, the quality of the audio depends on the signal-to-noise ratio (SNR). The purpose of this paper is to investigate if rate adaptation can be avoided, and a system can rely instead on the audio encoder and decoder to alleviate the effect of channel errors. To this end, the paper reports on a set of experiments on various combinations of channel conditions, constellation sizes and audio encoding used and on the final audio quality achieved. The Mean Opinion Score (MOS) is used for performance evaluation. The MOS values are generated using the ITU-T P.862 (PESQ) and P.863 (POLQA) algorithms, and also using tests by experts. The results support the common practice of adapting the physical layer parameters to changing channel conditions. However, in some cases, it is possible to maintain a constant rate without impacting significantly the quality of the audio. This means that the complexity associated with physical layer and audio rate adaptation can be avoided leading to simpler and more robust designs.

The ECG Monitoring Terminal Design of Family Used in Telemedicine

2015 ◽  
Vol 738-739 ◽  
pp. 797-800
Author(s):  
Jia Xin Yao ◽  
Dan Fei Huang ◽  
Jun Qiang Chen
Keyword(s):  
Real Time ◽  
Local Area Network ◽  
Signal To Noise Ratio ◽  
The Elderly ◽  
Local Area ◽  
Wireless Transmission ◽  
High Signal ◽  
Area Network ◽  
Ecg Monitoring ◽  
Ecg Data

With the improvement of people's living standards and life rhythm speeding up, the cardiovascular and cerebrovascular diseases have become a danger to the top killer of the elderly health and longevity.This paper designed an ECG monitoring terminal of family used in telemedicine for cardiovascular and cerebrovascular diseases.The terminal adopted ADS1298 chip as collection simulation front-end, AVR as core processor ,collected the ECG signal and wireless transmission .The monitoring terminal had high common mode rejection ratio, high signal to noise ratio, low energy consumption, small volume, etc .And can real-time transfer the ECG data to the local area network through wireless transmission technology,convenient medical staff grasp patient's ECG data real-time and treatment it in time,this design meets the basic requirement of the portable monitoring.

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