Impact of engineering parameters on performance of relay-assisted network

Abstract

<span>This paper compares the performance of a relay assisted network to the performance given by a classical macrocell network without the presence of relay node schemes. The capacity enhancement provided by a relaying system as a function of the relay antenna height and the propagation environment surrounding the relay nodes is analyzed and discussed in details. The analysis in this work is based on the theoretical Shannon capacity where both measured/experimental path loss and calibrated path loss models are taken into consideration. In this work, we assume a decode and forward scheme, a full-duplex relaying protocol and an optimized relay location is investigated. A 30 % of improvement in the macrocell capacity is achieved with the usage of relaying scenario compared to a classical macrocell network. Furthermore, increasing the relay antenna height from 4 meters to 12 meters can significantly increase the relay capacity to more than 20 % in suburban and moderate urban environments.</span>

A Beamforming Technique Using Rotman Lens Antenna for Wireless Relay燦etworks

“…In the recent years, several techniques have been proposed in the field of wireless communications to enhance the error performance of the whole system and its achievable throughput [1][2][3][4][5][6]. A group of these techniques works by increasing or optimizing the transmitted power, while another group is applying powerful forward error detection and correction techniques to increase the achievable gain.…”

“…Later on, several schemes are suggested to improve both diversity order and coding gain by combining diversity techniques with coding algorithms including but not limited to space-frequency coding (SFC) schemes and spacetime coding (STC) schemes [10,[13][14][15]. Furthermore, special diversity techniques using beamforming schemes [11][12][17][18][19] are used to steer the transmitting antenna beams towards the destination terminal to enhance the BER performance and the throughput by maximizing the received signal to noise ratio (SNR), given that the BER performance of the multi-antenna systems suffer from the multiuser interference and channel impairments [1][2][3][4][5][6][7][8][9]. In addition, it is very well known that it is difficult to deploy several antennas at the same mobile station due to several limitations.…”

A computationally efficient non-coherent technique for wireless relay networks

“…873If three relay nodes are used during the k th transmission frame, the obtained signals by the destination terminal can be expressed as(9).…”