1. A method for channel estimation comprising
forming at least two sets of multipath components for a reception range by applying spatial filtering to reference signal information measured by a communication device, wherein each set of multipath components comprises a number of multipath components that is less than the number of multipath components for the range, and
performing separate parameter estimations on the at least two sets of multipath components.
2. A method according to claim 1, wherein the communication device comprises a mobile device, the method comprising providing a virtual multi-antenna array by performing by the mobile device a first measurement in a first location and at least one second measurement in at least one second location.
3. A method according to claim 1, comprising forming a first set of multipath components by a first directed beamformer and at least one second set of multipath components by at least one second directed beamformer.
4. A method according to claim 1, comprising varying the spatial filtering to rotate a reception beam of the communication device over a 360 degrees range.
5. A method according to claim 1, comprising combining the results of the separate parameter estimations to produce channel state information for the communication device.
6. (canceled)
7. (canceled)
8. A method according to claim 1, wherein the communication device comprises a mobile device, the method comprising switching between different modes of channel estimation based on the velocity of a the mobile device.
9. A method according to claim 8, comprising switching to or from a mode where the range is divided into subranges by the spatial filtering based on a velocity threshold.
10. (canceled)
11. A method according to claim 1, comprising communicating information between the communication device and a network entity concerning the manner channel state information is produced.
12. A method according to claim 1, comprising applying notch filtering to multipath components.
13. A method according to claim 12, comprising comparing a full channel impulse response with a channel impulse response where the strongest multipath component has been notched out and estimating at least one parameter based on the comparison.
14. A method according to claim 13, wherein the at least one parameter comprises at least one of angle of arrival of the multipath component, incident amplitude, incident phase and path delay.
15. An apparatus for channel estimation, the apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to:
form at least two sets of multipath components for a reception range by applying spatial filtering to reference signal information measured by a communication device, wherein each set of multipath components comprises a number of multipath components that is less than the number of multipath components for the range, and
perform separate parameter estimations on the at least two sets of multipath components.
16. An apparatus according to claim 15, wherein the apparatus is configured to combine the results of the separate parameter estimations to produce channel state information for the communication device.
17. An apparatus according to claim 15, the apparatus being configured to form a virtual multi-antenna array based on a first measurement in a first location by a mobile device and at least one second measurement in at least one second location by the mobile device, andor a first set of multipath components by a first directed beamformer and at least one second set of multipath components by at least one second directed beamformer.
18.-22. (canceled)
23. A computer program comprising code adapted to perform the steps of claim 1 when the program is run on a processor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A skin treatment composition comprising an alkyl benzoate represented by the following general formula (1):
wherein R denotes a branched or straight chain alkyl group having 8-10 carbon atoms.
2. The skin treatment composition of claim 1 wherein the compound represented by the aforementioned general formula (1) is 3,7-dimethyloctyl benzoate.