TY - JOUR AU - Fu, Kuo-Ching AU - Chen, Yung-Fang PY - 2010 DA - 2010/11/10 TI - Robust Blind Frequency and Transition Time Estimation for Frequency Hopping Systems JO - EURASIP Journal on Advances in Signal Processing SP - 172703 VL - 2010 IS - 1 AB - In frequency hopping spread spectrum (FHSS) systems, two major problems are timing synchronization and frequency estimation. A blind estimation scheme is presented for estimating frequency and transition time without using reference signals. The scheme is robust in the sense that it can avoid the unbalanced sampling block problem that occurs in existing maximum likelihood-based schemes, which causes large errors in one of the estimates of frequency. The proposed scheme has a lower computational cost than the maximum likelihood-based greedy search method. The estimated parameters are also used for the subsequent time and frequency tracking. The simulation results demonstrate the efficacy of the proposed approach. SN - 1687-6180 UR - https://doi.org/10.1155/2010/172703 DO - 10.1155/2010/172703 ID - Fu2010 ER -