| 摘要 |
A method of estimating frequency offset of a received signal in a terminal apparatus comprises a) determining a phase change between a first and a second reference symbol of the received signal, wherein the time distance t between the first and the second reference symbols is associated with an observation frequency f such that f=1/t. The method further comprises: b) determining a preliminary frequency offset Deltaf based on the determined phase change, wherein Deltaf forms a frequency offset hypothesis Deltafh; and c) decoding at least a part of the received signal, with application of the frequency offset hypothesis Deltafh, to a decoded signal. The method further comprises: d) determining whether the decoded signal is a successful decoding. If the decoded signal is a successful decoding, the frequency offset hypothesis Deltafh is determined to be the estimated frequency offset, but if the decoded signal is not a successful decoding, the frequency offset hypothesis Deltafh is adjusted by an integer n times the observation frequency f such that Deltafh=Deltaf+n�f, where nepsilon[+/-1, 2, 3, . . . ]. Steps c) and d) are then repeated. |
