Patent ID: 11070338

Abstract:
A radio node (12, 14) is configured to transmit or receive reference symbols (18) of a reference signal (16) on respective radio resources, including first and second sets (S1, S2) of radio resources that differ in at least one radio resource. The reference signal (16) may be for instance a tracking reference signal (16) configured for time or frequency tracking. The first set (S1) of radio resources includes a first pair of radio resources that are separated from one another in a radio resource domain by a first separation distance (D1). The second set (S2) of radio resources includes a second pair of radio resources that are separated from one another in the radio resource domain by a second separation distance (D2). The radio resource domain may be a time domain or a frequency domain. In one or more embodiments, the second separation distance (D2) is at least twice as large as the first separation distance (D1).