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In downlink relay systems, the conventional straightforward relaying scheme named decode-and-forward (DF) protocol is used at relay station (RS) to decode the data received from base station (BS) and forward the decoded data to the mobile station (MS) to improve the spatial diversity gain. However, conventional DF mode is spectral inefficient and not capacity optimal since the wireless channels in...
Channel estimation error problem is among the main causes of performance degradation in wireless networks. In this paper, we investigate the impact of channel estimation error on cooperative communications. We analyze the symbol error rate (SER) performance of decode-and-forward (DF) cooperative communications with channel estimation error over Rayleigh channels. The exact SER expressions and the...
This paper presents an analysis of cooperative direct-sequence code division multiple access (DS-CDMA) relay communications with one source terminal and two relay nodes with multiuser detection over the frequency-flat fading channel for uplink transmission where the decode-and-forward (DF) protocol is employed at the relay nodes. We analyze for synchronous transmission with binary phase shift keying...
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