Performance of hybrid decode–amplify–forward protocol for multiple relay networks over independent and non-identical flat fading channels

2011 ◽  
Vol 5 (14) ◽  
pp. 2018-2027 ◽  
Author(s):  
E. Olfat ◽  
A. Olfat
Keyword(s):  
Fading Channels ◽  
Relay Networks ◽  
Flat Fading ◽  
Multiple Relay

scholarly journals Performance Analysis of Relay Subset Selection for Amplify-and-Forward Cognitive Relay Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Kiran Sultan ◽  
Ijaz Mansoor Qureshi ◽  
Aqdas Naveed Malik ◽  
Muhammad Zubair
Keyword(s):  
Fading Channels ◽  
Relay Selection ◽  
Subset Selection ◽  
Relay Networks ◽  
Cumulative Distribution ◽  
Amplify And Forward ◽  
Secondary Users ◽  
Coverage Area ◽  
Cognitive Relay Networks ◽  
Multiple Relay

Cooperative communication is regarded as a key technology in wireless networks, including cognitive radio networks (CRNs), which increases the diversity order of the signal to combat the unfavorable effects of the fading channels, by allowing distributed terminals to collaborate through sophisticated signal processing. Underlay CRNs have strict interference constraints towards the secondary users (SUs) active in the frequency band of the primary users (PUs), which limits their transmit power and their coverage area. Relay selection offers a potential solution to the challenges faced by underlay networks, by selecting either single best relay or a subset of potential relay set under different design requirements and assumptions. The best relay selection schemes proposed in the literature for amplify-and-forward (AF) based underlay cognitive relay networks have been very well studied in terms of outage probability (OP) and bit error rate (BER), which is deficient in multiple relay selection schemes. The novelty of this work is to study the outage behavior of multiple relay selection in the underlay CRN and derive the closed-form expressions for the OP and BER through cumulative distribution function (CDF) of the SNR received at the destination. The effectiveness of relay subset selection is shown through simulation results.

scholarly journals An efficient network coded ARQ for multisource multidestination relay networks over mixed flat fading channels

2013 ◽  
Vol 67 (4) ◽  
pp. 282-288 ◽  
Author(s):  
Quoc-Tuan Vien ◽  
Brian G. Stewart ◽  
Huaglory Tianfield ◽  
Huan X. Nguyen ◽  
Jinho Choi
Keyword(s):  
Fading Channels ◽  
Relay Networks ◽  
Flat Fading

scholarly journals Performance Analysis of MIMO STBC System in Flat Fading and Frequency Selective Fading Channels

2019 ◽  
Vol 3 (1) ◽  
pp. 19
Author(s):  
Pebri Yeni Samosir ◽  
Nyoman Pramaita ◽  
I Gst A. Komang Diafari Djuni Hartawan ◽  
Ni Made Ary Esta Dewi Wirastuti
Keyword(s):  
Fading Channels ◽  
System Performance ◽  
Mimo System ◽  
Multipath Fading ◽  
Delay Spread ◽  
Selective Fading ◽  
Frequency Selective Fading ◽  
Flat Fading ◽  
Frequency Selective ◽  
Frequency Selective Fading Channels

Multiple Input Multiple Output (MIMO) technology is a technique that can be used to overcome multipath fading. The multipath fading is caused by signals coming from several paths that experience different attenuations, delays and phases. In a multipath condition, an impulse that sent by the transmitter, will be received by the recipient not as an impulse but as a pulse with a spread width that called delay spread. Delay spread can cause intersymbol interference (ISI) and bit translation errors from the information received. To determine the effect of delay spread on the MIMO system, then MIMO system performance research was performed on flat fading and frequency selective fading channels using the Space Time Block Code (STBC) coding technique. This research was conducted using MatLab 2018a software. The simulation results show that the MIMO STBC system performance on flat fading channels is better than the MIMO STBC system performance on the frequency selective fading channel. This result is analyzed based on the value of BER vs. Eb/No and eye diagram.

Sign in / Sign up

Export Citation Format

Share Document