CPC H04L 25/0212 (2013.01) [H04W 64/003 (2013.01)] | 20 Claims |
1. An apparatus comprising at least one processor; and
at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:
receiving, by the apparatus, assistance data for positioning the apparatus, the assistance data indicating reference signals to be transmitted by a second apparatus that are to be measured and at least one channel characteristics whose value is to be determined for positioning;
generating, using the assistance data, a transmit sequence;
generating a combination of the transmit sequence by combining the transmit sequence with a corresponding received signal or by autocorrelating the transmit sequence;
determining a receive filter response;
obtaining a transmit filter response of the second apparatus;
generating a combined filter response using the receive filter response and the transmit filter response;
measuring reference signals received over a channel by sampling them into a plurality of time-domain samples;
estimating the channel from the plurality of time-domain samples using the combined filter response and the combination of the transmit sequence; and
determining, per channel characteristics of the at least one channel characteristics, a value of the channel characteristics based on the channel estimated.
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