Adaptive power loading in OFDM-based WLANs and the resulting performance improvement in voice and data applications
| Autor: | O. Awoniyi, O. Oteri, Fouad A. Tobagi |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Voice over IP
business.industry Computer science Transmission Control Protocol Orthogonal frequency-division multiplexing computer.internet_protocol ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Real-time computing Throughput Computer Science::Performance Packet loss Computer Science::Multimedia Wireless lan Computer Science::Networking and Internet Architecture Electronic engineering Bit error rate Wireless Wireless Application Protocol Performance improvement business computer Decoding methods Communication channel |
| Zdroj: | VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference, 2005.. |
| DOI: | 10.1109/vetecf.2005.1558032 |
| Popis: | Packet loss due to transmission errors in the wireless channel can significantly degrade the performance of applications such as Transmission Control Protocol (TCP)-based data applications and Voice over IP (VoIP) over wireless lo- cal area networks (WLANs). It leads to a reduction in TCP throughput for data and a loss in intelligibility for VoIP. In this paper, we propose a power loading scheme based on a semi-analytic expression for Packet error rate (PER) in a block- convolutional coded Orthogonal Frequency Division Multiplexing (OFDM) system with hard-decision decoding. We quantify the performance improvement in voice and data applications using adaptive power loading and investigate the effect of channel estimation errors on the performance improvement. I. INTRODUCTION |
| Databáze: | OpenAIRE |
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