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We consider a device-to-device scenario in a fragmented spectrum band. Multiple devices transmit complex symbols with a single antenna on distributed, but disjoint OFDM resources. The devices select sufficient frequency resources to enable channel estimation, if the receiver has complete knowledge of the resource map. However, in this scenario the actual allocation map is unknown to the receiver....
We consider a device-to-device scenario, where multiple users transmit complex symbols with constant amplitude on exclusive OFDM resources. However, the spectrum usage and therefore the assignment of resources by each user is unknown at the receiver. The number of resources allocated by each user are well chosen, so that the sparse channel characteristics can be coarsely estimated once the correct...
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