| 摘要 |
<p>The present invention relates to a receiver in a 2×2 Line of Sight Multiple Input Multiple Output, LoS MIMO, system. The receiver is arranged to estimate a first (S1) and a second (S2) signal on the basis of a first (r1(t)) and a second (r2(t)) signal received from respective first and second transmitters (Tx1,Tx2). Said received signals (r1(t), r2(t) comprises a first and second signal. The receiver comprises a first Phase Locked Loop (11), PLL, and a second PLL (12), which are arranged to respectively determine a first (In1) and second (In2) demodulated signal from the first (r1(t)) and the second (r2(t)) received signals. The receiver further comprises an equalizer (13) which is arranged to estimate the first (S1) and second (S2) signals from the demodulated signals (In1,In2). The receiver is particularly characterized in that the equalizer (13) further is arranged to compensate for an independent rotation frequency ftr2-ftr1, where ftr1 and ftr2 are the respective deviations from the nominal frequency values of a first and a second transmitted signals comprising the first and second signals.</p> |
