Method of estimating downlink channel, and user equipment
AssigneeNokia Corporation
InventorJuha Ylitalo
Life of this patent
Estimating the term…
Abstract
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.
Claims33
A method of estimating a downlink channel in a radio system, comprising:
- forming an impulse response for a common pilot signal transmitted with a wide antenna beam;
- forming an impulse response for a beam-specific pilot signal transmitted with a directional narrow antenna beam;
- forming a phase difference between the wide antenna beam and the directional narrow antenna beam;
- and
- forming an impulse response for the downlink channel by using the impulse response of the common pilot signal and the impulse response of the beam-specific pilot signal, taking into account the phase difference formed.
User equipment of a radio system, comprising:
- means for forming an impulse response for a common pilot signal transmitted with a wide antenna beam;
- means for forming an impulse response for a beam-specific pilot signal transmitted with a directional narrow antenna beam;
- and
- impulse response means for forming an impulse response for the downlink channel by using the impulse response of the common pilot signal and the impulse response of the beam-specific pilot signal, taking into account the phase difference formed.
User equipment of a radio system, being configured to:
- form an impulse response for a common pilot signal transmitted with a wide antenna beam;
- form an impulse response for a beam-specific pilot signal transmitted with a directional narrow antenna beam;
- and
- form an impulse response for the downlink channel by using the impulse response of the common pilot signal and the impulse response of the beam-specific pilot signal, taking into account the phase difference formed.
Dependencies are inferred from the claim text.