BIT ERROR RATE TESTERS EXFO

How to reduce the bit error rate of OFDM

How to reduce the bit error rate of OFDM

For this, numerous techniques are proposed to beat the PAPR problem like i) Selective mapping (SLM) ii) Partial transmit sequence (PTS), iii) Clipping, iv) Clipping and filtering. Current technological objectives for OFDM focus primarily on optimizing bit error rate (BER) performance, particularly in high-data-rate applications where transmission reliability directly impacts user experience. However, one amongst the foremost drawbacks of the OFDM system is that the high-peak-to-average power ratio (PAPR) that leads the system to provide in-band distortion and out-of-band radiation and reduces its efficiency. OFDM can be implemented easily, it is spectrally efficient and can provide high data rates with sufficient robustness to channel imperfections. Abstract-In this paper we present an analytical approach to evaluate the bit error rate (BER) of OFDM systems subject to carrier frequency offset (CFO) and channel estimation error in Rayleigh flat fading as well as in time and frequency selective fading channels.

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Optical module rate adaptation

Optical module rate adaptation

The present disclosure relates to a method, an apparatus, a medium, and a device for adapting an optical port rate of a network communication device, the method including: after detecting that an optical module corresponding to an optical fiber interface is in place . While the industry-standard OSFP (Octal Small Form-Factor Pluggable) module has successfully enabled 400Gbps, 800Gbps, and 1. Abstract: In this paper, we propose a rate-adaptive FEC scheme based on LDPC codes together with its software reconfigurable unified FPGA architecture. It utilizes a mapping method through weighted summation, enabling an even increase of bit energy. Industry pundits have recently speculated that demand for 100G/400G switches may take off in 2019, prompting optical transceiver module vendors to sample data center switches with high data transmission rates earlier than expected. Abstract—Rate-adaptive optical transceivers can play an impor-tant role in exploiting the available resources in dynamic optical networks, in which different links yield different signal qualities.

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ExFO Optical Time Domain Reflectometer Usage and Settings

ExFO Optical Time Domain Reflectometer Usage and Settings

This manual provides basic instructions for the use of EXFO OTDR series Optical Time Domain Reflectometers, including the setup of the device, measurement of optical cables, analysis of measurement results and generation of reports. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form, be it electronically, mechanically, or by any other means such as photocopying, recording or otherwise, without the prior writt eved to be accurate and reliable. Introducing the FTB-700 OTDR The FTB-700 OTDR allows you to characterize a fiber-optic span, usually optical fiber sections joined by splices and connectors. The MaxTester 700B/C Series is the first tablet-inspired OTDR line that is handy, lightweight and rugged enough for any outside plant environment. With a 7-inch, outdoor-enhanced touchscreen–the most efficient handheld display in the industry–it delivers an unprecedented user experience. To ensure quality of service (QoS), network constructors, service providers and operators need to accurately pinpoint existing and potential problems, making test and measurement equipment vital.

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