Method for direct position estimation in UWB systems

Direct Wideband Coherent Localization by Distributed Antenna Arrays

“…The method is more efficient for short observation intervals than the spectral focusing AoA approach proposed in [24]. A method for direct position estimation of baseband UWB signals was proposed in [25]. It is based on the steered covariance matrix approach as well.…”

“…In our approach, the unknown parameters (the location of the Tx) are contained in the covariance matrix (this is the steered covariance matrix approach), whereas in [5,26], they were contained in the steering vector, which limits the application to narrowband signals. We model bandpass signals, unlike [23,25], where the signals are in the baseband ([23] is for acoustic signals), and our antenna array is distributed, unlike [23,26]. Instead of changing the attenuations over the search grid, we used channel weights based on the received SNRs, unlike [5,25].…”

“…We model bandpass signals, unlike [23,25], where the signals are in the baseband ([23] is for acoustic signals), and our antenna array is distributed, unlike [23,26]. Instead of changing the attenuations over the search grid, we used channel weights based on the received SNRs, unlike [5,25].…”

Method for direct self-localization of synchronous IR UWB node(s) in indoor scenario: Experimental verification

“…Weiss and Amar proposed method for direct position determination of multiple radio signals [4]. MUSIC based method for direct localization in UWB systems based on the concept of stered covariance matrix was proposed in [5]. Method for direct self-localization of synchronous Impulse Radio Ultra Wide Band (IR UWB) Node(s) in dense multipath indoor scenario was proposed in [6] where performances of this method are illustrated by results of simulations.…”

Localization of users in multiuser MB OFDM UWB systems based on TDOA principle

“…A one-step subspace-based method for direct position estimation in impulse UWB systems based on mathematical model of the signal on sensor array is proposed in [4]. This method can be used in multiuser scenario and in multipath conditions when UWB impulses are partially overlapped in time due to multipath.…”