| 摘要 |
There is disclosed a method of estimating frequency offset of a received signal in a terminal apparatus operating in a wireless communication system. The method 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; b) determining a preliminary frequency offsetΔf based on the determined phase change, wherein the preliminary frequency offsetΔf form a frequency offset hypothesisΔfh; c) decoding at least a part of the received signal, with application of the frequency offset hypothesisΔfh, to a decoded signal; d) determining whether the decoded signal is a successful decoding, wherein if the decoded signal is a successful decoding, determining the frequency offset hypothesisΔfh to be the estimated frequency offset, and if the decoded signal is not a successful decoding, adjusting the frequency offset hypothesisΔfh by an integer n times the observation frequency f such thatΔfh=Δf+n�f, where nε[+/−1, 2, 3, . . . ], and repeating steps c) and d). Computer program, frequency controller, and terminal apparatus are also disclosed. |
