Definition
A wireless relay system involves at least three nodes: a source node, a relay node, and a destination node. The relay node assists the transmission of information from the source to the destination. The relay channels include all channels between these nodes.
Historical Background
Due to the complicated transmission media, fading has been considered as a key characteristic feature of the wireless communications. As the wireless fading greatly shortens the delivery distance, the main task in wireless communication systems is to combat the fading to achieve reliable communication. To address this issue, a number of transmission techniques have been proposed. Among them, wireless (radio frequency) relays are widely known to be useful for combating radio channel fading over long distances. Relay technique is a promising technique since it allows a highly flexible equipment deployment to solve...
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Wang, R., Wang, P. (2019). Fundamental Properties of Wireless Relays and Their Channel Estimation. In: Shen, X., Lin, X., Zhang, K. (eds) Encyclopedia of Wireless Networks. Springer, Cham. https://doi.org/10.1007/978-3-319-32903-1_173-1
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DOI: https://doi.org/10.1007/978-3-319-32903-1_173-1
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