High-Resolution TOA Estimation With Multi-Band OFDM UWB Signals

In this paper, the authors propose a simple model-based Time-Of-Arrival (TOA) estimation technique for Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) signals based on the ECMA-368 standard. The proposed technique does not need oversampling at the receiver. The key idea is to minimize the energy leakage from the first channel path due to mis-sampling. They use realistic channel models and assume that no channel statistical information is known at the receiver. In their approach, the multi-band signals are coherently combined in order to improve the resolution of the TOA estimation.