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In this letter, we propose and experimentally investigate a training-aided iterative frequency offset estimation (IFOE) method, which can track dynamic frequency offset (FO) drift in coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. In contrast to existing FO estimation algorithms that compute specific FO values, in IFOE, only the sign value of FO is judged and recorded...
A new preamble structure is proposed for Narrowband Power Line Communication (NB-PLC) system, and therefore a corresponding timing estimator with interval detection and pattern matching is put forward. In the new estimator, firstly the received signals are conducted cross-correlation with the preamble in the transmitter, then the cross-correlation values are obtained and divided into several groups...
A novel algorithm, referred to as MODE-SUMWE, is proposed to estimate direction-of arrival (DOA) of coherent signals on a uniform circular array. In the proposed algorithm, mode excitation method is first used to transform the UCA in element space into a virtual uniform linear array (VULA) in mode space, an efficient subspace-based method is then employed to estimate the DOA of coherent signals. No...
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