| 摘要 |
<p>Receiver (120) and method (500) in a receiver (120), for estimating a normalised frequency offset between a transmitter (110) and the receiver (120) in a wireless communication system (100), based on Orthogonal Frequency Division Multiplexing, OFDM The method (400) comprises receiving (401) a first pilot signal ( y r1 ) and a second pilot signal ( y r2 ) from the transmitter (110); computing (402) a Karhunen-Loeve approximation » K (Æ), up to any finite order K of a log-likelihood function of the frequency offset hypothesis »(Æ), based on the received (401) pilot signals ( y r1 , y r2 ); and estimating (403) the frequency offset by calculating a maximum value of the computed (402) Karhunen-Loeve approximation » K (Æ).</p> |
