Abstract
The UWB unique properties such as fine ranging and immunity to small scale fading are utilized in order to exploit the multiuser diversity in UWB networks. The optimal cooperation strategies in the absence of control packet overhead are analyzed in the proactive and reactive settings. It is shown that the proposed method achieves a considerable diversity gain while minimizing the overhead of control packet exchange that is required for coordination among the relays.
Highlights
Due to the large bandwidth occupied by pulses, UWB signals are considered robust to small scale fading effects
UWB enables high accuracy ranging which can be used for the design of location-aware MAC and routing mechanisms. We exploit these properties of UWB, that is, availability of ranging information and immunity to small scale fading, in the design of an UWB-based Cooperative Retransmission Scheme (UCoRS) [1]
Note that since message exchange between relays is not performed in UCoRS, a relay Ri is unable to find out the set of relays which have successfully decoded the packet from S at time slot t, denoted by F(t)
Summary
The UWB unique properties such as fine ranging and immunity to small scale fading are utilized in order to exploit the multiuser diversity in UWB networks. The optimal cooperation strategies in the absence of control packet overhead are analyzed in the proactive and reactive settings. It is shown that the proposed method achieves a considerable diversity gain while minimizing the overhead of control packet exchange that is required for coordination among the relays
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