مقاله انگلیسی رایگان در مورد اندازه گیری نرخ خطای بیتی شبکه فیبر نوری از طریق آنالیز اترنت – IEEE 2017

DRDO has been actively involved in the design and development of various types of UGVs for different applications. The first Indian tracked unmanned ground vehicle, named as MUNTRA (Mission Unmanned TRAcked) with the state-of-art technologies was designed and developed by the Combat Vehicles Research & Development Establishment (CVRDE), Avadi, Chennai. CVRDE has developed the teleoperated MUNTRA series of tracked UGVs on the BMP II class of armoured, amphibious vehicles for specific operational missions of unmanned surveillance, NBC reconnaissance and mine detection. For one of the surveillance requirements of possible threats, CVRDE had established a fiber optic based communication link for a standalone, unmanned surveillance system (USS). Various land and sea based threats can be detected, tracked and classified using the sensor suite of the USS. Visual confirmation of the threats can also be achieved by the synchronous slaving of the electro-optic sight to the radar. This paper describes the performance analysis of fiber optic network in terms of BER, throughput, latency, jitter using Ethernet analyzers. BER is defined as the rate at which errors occur in a transmission system. This can be directly translated into the number of errors that occur in a string of a stated number of bits. The definition of bit error rate can be defined as: BER = Number of errors / Total number of bits sent. If the medium between the transmitter and receiver is good and the signal to noise ratio is high, then the bit error rate will be very small, possibly insignificant, and having no noticeable effect on the overall system. However if noise is present, then there is a chance that the BER will need to be considered. When data is transmitted over a data link, there is a possibility of errors being introduced into the system and the integrity of the system may be compromised. As a result, it is necessary to assess the performance of the system. Unlike many other forms of assessment, bit error rate, BER assesses the full end to end performance of a system including the transmitter, receiver and the medium between the two. In this way, BER enables the actual performance of a system in operation to be tested. For fiber optic systems, bit errors mainly result from imperfections in the components of the link. These include the optical driver, receiver, connectors, splices, bends, cracks and the intrinsic properties of the fiber itself. Bit errors may also be introduced as a result of optical dispersion and attenuation that may be present. Noise may also be introduced in the optical receiver itself. Typically these may be photodiodes and amplifiers which need to respond to very small changes and as a result there may be high noise levels present. Another contributory factor for bit errors is any phase jitter that may be present in the system as this can alter the sampling of the data.