REDUCED COMPLEXITY TIMING ESTIMATION AND TRACKING OF ARRIVAL OF OFDM SYMBOLS POSITIONING REFERENCE SIGNALS FOR LOCATING THE POSITION OF A MOBILE TERMINAL

摘要

A method and corresponding apparatus are provided to reduce the complexity of calculations needed to determine the time of arrival of position reference signals transmitted from multiple cells. A scheduler determines at a given instance what portions of a search grid or search window to search. A timing estimation circuit operating under the control of the scheduler computes timing estimates and reports the timing estimates back to the scheduler. The scheduler uses the timing estimates reported by the detection circuit to scheduler subsequent searches of the search grid or search window.