Murphy, Bilak & Homiller, PLLC
Frequency offset estimation
A radio node (14) is configured to perform frequency offset estimation. The radio node (14) in this regard receives a first set (22-1) of reference symbols of a reference signal during respective time resources, and determines a first frequency offset estimate (26-1) using the first set (22-1) of reference symbols. The radio node (14) also receives a second set (22-2) of 5 reference symbols of the reference signal during respective time resources, e.g., using the same local oscillator frequency for down conversion as with the first set (22-1). The radio node (14) further determines, based on the first frequency offset estimate (26-1), a second frequency offset estimate (26-2) using the second set (22-2) of reference symbols. In some embodiments, the radio node (14) determines a third frequency offset estimate as a sum of the first and 10 second frequency offset estimates, and tunes a local oscillator frequency, or performs frequency offset compensation, based on the third frequency offset estimate.
Telefonaktiebolaget LM Ericsson (publ)
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additional additional additional inventional inventional
Per Lars Håkan Mattias
Ernström Lindbom Björkegren Frenne