دانلود رایگان مقاله لاتین عملکرد سیستم رله از سایت الزویر
عنوان فارسی مقاله:
عملکرد یک سیستم رله به صورت دو طرفه با یک رله کامل دوبلکس
عنوان انگلیسی مقاله:
Performance of a bi-directional relaying system with one full duplex relay
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
The relay assisted multi-hop wireless communication system offers larger coverage and improved throughput [1,2]. The relay in multi-hop communication systems can operate in two modes (i) full duplex and (ii) half duplex. The half duplex mode does not allow the simultaneous transmission and reception in time and frequency, while full duplex mode does allow. Thus full duplex relaying based communication offers the advantage of better resource utilization and improved data rates. However, the full duplex relaying did not attract the researchers in the past due to strong selfinterference (SI) in transmitting and receiving antennas of the relay node. The SI between transmitter and receiver exists because of imperfect SI suppression or cancellation methods. However, with the growing advancements in the SI cancellation techniques in recent past [3,4], the full duplex communication has emerged as a potential wireless technology in the recent literature [5,6]. In relay-assisted communication systems, the relay processes the incoming signal, and processed signal is then forwarded ahead to next node. Based on the processing at the relay node, several relaying protocols are used in the literature such as decode-andforward (DF), amplify-and-forward (AF) etc. In DF, the relay forwards the decoded version of the received signal, whereas in AF, the relay first amplifies the received signal and then forwards it. The AF and DF protocols hence requires two time slots and thus under-utilize the available spectral resources. Recently, the twoway relaying (TWR) technique (also known as bi-directional relaying) has emerged as a spectrally efficient means for the two user communication systems, and has been used widely in the recent literature of radio-frequency wireless communication and optical wireless communication [7–10]. In TWR based communication system, the relay assists two users to communicate in two time slots, and thus to achieve the spectrally efficient transmission.
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کلمات کلیدی:
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