Position based CDMA with multiuser detection (P-CDMA/MUD) for wireless ad hoc networks

We propose a novel position-based MAC protocol based on multiuser detection for wireless ad hoc networks. We solve the duplex scheduling problem in ad hoc networks and allocate user signatures dynamically based on position. Our protocol leverages previous advances in low-power GPS receivers and low-complexity multiuser detectors. By using multiuser detection, we dispense with the notion of collisions at the MAC sublayer and give a throughput comparison between P-CDMA/MUD and 1-persistent CSMA. We show that P-CDMA/MUD can achieve a throughput one to two orders of magnitude over that of 1-persistent CSMA