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Relay selection for cooperative communications has been proposed as a technique to provide remarkable gains in multi-relay cooperative networks. Opportunistic relaying (OR) is a relay selection scheme used in dual-hop decode-and-forward cooperative networks, shown to be globally outage- optimal under an aggregate power constraint. However, due to channel fluctuations, the channel state information...
Incremental opportunistic relaying (IOR) has been proposed to increase the spectral efficiency of the two-phase cooperative transmissions by exploiting limited feedback from the destination node. Specifically, the relaying process is activated only if the source-destination channel is of insufficient quality. In this case, the feedback instructs the best relay to forward the source message to the...
This paper presents a novel receiving scheme with combining phase error tracker (PET) and MMSE equalizer for multi-band ultra wideband (MB-UWB). A low complexity phase error tracker is developed to track the phase error caused by carrier frequency offset (CFO) and sampling clock offset (SCO), which will cause fatal error in coherent OFDM demodulation. The proposed joint scheme makes the receiver more...
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