A Decorrelating Multiuser Receiver for Transmit-Reference UWB Systems

Transmit-reference (TR) is known as a realistic but low data rate candidate for ultra-wideband (UWB) communication systems. This paper proposes a new TR-UWB scheme that uses a decorrelating receiver to enable higher data rates with only a reasonably small increase in complexity while still maintaining the ease of synchronization of the original. Integrate and dump with oversampling is used to derive an approximate signal processing data model in a multiuser context. An iterative and a blind receiver algorithm are introduced and tested in simulations. Multiple reference delays are used to further improve the system performance similar to the role of multiple antennas in communication systems. The receiver´s complexity and other practical issues in transceiver design are also discussed.