Capacity Performance Analysis for Decode-and-Forward OFDM Dual-Hop System

Ha-Nguyen VU
Le Thanh TAN
Hyung Yun KONG

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.9    pp.2477-2480
Publication Date: 2010/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.2477
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
OFDM transmission,  decode and forward,  multi-hop,  ergodic capacity,  probability density function,  

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In this paper, we propose an exact analytical technique to evaluate the average capacity of a dual-hop OFDM relay system with decode-and-forward protocol in an independent and identical distribution (i.i.d.) Rayleigh fading channel. Four schemes, (no) matching "and" or "or" (no) power allocation, will be considered. First, the probability density function (pdf) for the end-to-end power channel gain for each scheme is described. Then, based on these pdf functions, we will give the expressions of the average capacity. Monte Carlo simulation results will be shown to confirm the analytical results for both the pdf functions and average capacities.