| 摘要 |
The invention relates to a method of estimating a downlink channel in a radio system, and user equipment in a radio system. The user equipment is configured to form an impulse response for a common pilot channel transmitted with a wide antenna beam and an impulse response for a beam-specific pilot signal transmitted with a directional narrow antenna beam. The user equipment is further configured to calculate the impulse response of the downlink channel by using the impulse response of the common pilot channel and the impulse response of the beam-specific pilot signal, taking into account the phase difference formed.
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