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The model of UWB WSN(wireless sensor networks) was proposed firstly, by UWB and non-coherent detection technology, a non-coherent detection receiver for UWB WSN was designed and the transmission capacity was studied. We found it will benefit to improve the transmission capacity of the UWB wireless sensor network if employing the non-coherent detection technology.

This This paper addresses the lower and upper bound of transmission capacity of hierarchical wireless networks from the views of information theory, and draws the conclusion that the lower bound capacity is the information rate defined in the paper, and the upper bound capacity, if the wireless channel is symmetric fading in the broad sense, will not exceed the term T(n5/ 2).

The importance of multiuser detection for CDMA-based ad hoc network is addressed in this paper. Conventionally, the terminal in CDMA-based ad hoc network uses matched filter to receive packets, so the performance (e.g., throughput) of the network suffers from multi-access interference (MAI). Different from above scheme, in this paper, each terminal of the ad hoc network is equipped with an adaptive blind linear multiuser detector, so the ability of MAI-resistance is gained. Based on fully-connected network model and Log-distance path loss radio propagation model, the throughput of ad hoc network with multiuser detection is studied. Simulation results show that multiuser detection can remarkably enlarge the throughput of ad hoc network.