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In this paper, we propose a repetitive transmission method for improving the reception performance of VICS (Vehicle Information and Communication System) on DARC (DAta Radio channel). DARC is a teletext broadcasting system multiplexed on an existing FM (Frequency Modulation) radio broadcasting. However the reception performance of DARC does not satisfy the demand for VICS application in multipath...
In this paper, the bit error rate (BER) performance of turbo coded multi-route multi-hop networks is presented. Multi-hop networks have received much attention in recent years because of their large channel capacity. When the information bit streams are transmitted over multiple routes, a route diversity effect would also be possible. In order to improve the route diversity effect the receiver side...
In this paper, we analyze the capacity of orthogonal frequency division multiplexing (OFDM) systems with carrier frequency offset (CFO) in frequency-selective Nakagami-m fading channels. Previous work on this topic has not taken into account the frequency selectivity of the channel. In this work, we have explicitly attributed the effect of channel frequency selectivity, i.e. frequency domain correlations,...
In multihop OFDM relay systems the end-to-end average capacity can be increased by incorporating subcarrier mapping (SCM) at the relay nodes. In this paper, we propose an exact analytical technique of evaluating the average capacity of a dual-hop OFDM relay system with SCM in a Rayleigh fading channel. Closed-form expressions are derived for the probability density function of the end-to-end SNR of...
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