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Ultra-wideband (UWB) is a promising wireless technology that has drawn widespread attention due to its many possible applications such as short range, low power communications. UWB systems typically operate in the frequency band between 3.1 and 10.6 GHz, so they are susceptible to interference from other systems, which can degrade performance. Thus, interference mitigation is an important problem...
Power control is of fundamental importance to operation of Ad Hoc networks for a number of reasons: throughput, network capacity, battery life; as well as delay can be significantly improved, and so on. It is given that a feedback control system model based on the signal to interference and noise ratio (SINR) of links in the network whose control input is related to the transmitted power. Variable...
The capacity of differential pulse-position modulation (DPPM) is considered in this paper. Since the formula of Shannon Capacity is effective only in the AWGN channel with continuous-valued inputs and outputs, while the channel employing M-ary DPPM modulation has discrete-valued inputs and continuous-valued outputs, we derive the modified formula which applies to calculate the capacity of a UWB system...
This paper calculates the channel capacity of 60 GHz wireless communication systems over indoor line-of-sight (LOS) and non-line-of-sight (NLOS) channels based on a 60 GHz link budget model. The SNR and therefore capacity varying according to the communication distance are researched. The simulation result shows that the channel capacity falls sharply as distance increasing, especially in NLOS channel...
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