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An Ultra wideband (UWB) spatio-temporal channel sounder, employing an orthogonal frequency division multiplexing (OFDM) signal and a receiving virtual array antenna was prototyped and evaluated in a narrowband interference environment. Channel information of the OFDM signal was estimated from the measured data. Time of arrival (TOA) was calculated by correlating the received waveforms with a template...
In most Asian and European countries, detect-and-avoid (DAA) is required at UWB low band (3.1-4.8 GHz). In Japan, we conducted evaluation experiments on the performance of DAA until March of 2010, which was a part of a three-year campaign to provide results of literature review and technical evaluation for the purpose of accomplishing Japanese UWB regulation. In this paper, experiment results on the...
This paper reports on the study of the interference effects from 4 types of ultra wideband (UWB) sources on a QPSK transmission system by simulation. The culprit UWB sources were: multi-band orthogonal frequency-division multiple-access (MB-OFDM), direct-sequence code division multiple access (DS-CDMA), DS spread spectrum UWB (DS-SS UWB), and additive white Gaussian noise (AWGN). The MB-OFDM and DS-CDMA...
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