A method, comprising: receiving, by a processor of a user equipment, UE, from a base station of a network, a reference signal via a communication link between the UE and the base station, the reference signal containing a tracking reference signal, TRS, configuration; receiving, by the processor of the UE from the base station, a TRS burst containing a plurality of TRS symbols; and processing, by the processor of the UE, the TRS burst to perform at least one of time delay estimation, delay spread estimation, frequency offset estimation and Doppler spread estimation as a reference for other reference signals; wherein a symbol spacing between two neighboring TRS symbols in the TRS burst is greater than or equal to 3 symbols; wherein it is characterized in that the TRS configuration defines a plurality of parameters comprising: X = a length of the TRS burst in terms of a number of 14-symbol slots; N = a number of orthogonal frequency-division multiplexing, OFDM, symbols occupied by one or more TRS symbol of the plurality of TRS symbols within each slot; S t = a TRS symbol spacing between two neighboring TRS symbols of the plurality of TRS symbols in a time domain; wherein, for the TRS burst, X = 2, N 1 = 2 for a first slot of the TRS burst, N 2 = 2 for a second slot of the TRS burst, and there are four TRS symbols in the TRS burst (N total = 4), wherein S t1 denotes a symbol spacing between a first TRS symbol in the first slot and a second TRS symbol in the first slot, wherein S t2 denotes a symbol spacing between the second TRS symbol in the first slot and a first TRS symbol in the second slot, wherein S t3 denotes a symbol spacing between the first TRS symbol in the second slot and a second TRS symbol in the second slot, and wherein S t2 is greater than or equal to S t3 which is greater than or equal to S t1 (S t2 >= S t3 >= Su). receiving, by a processor of a user equipment, UE, from a base station of a network, a reference signal via a communication link between the UE and the base station, the reference signal containing a tracking reference signal, TRS, configuration; receiving, by the processor of the UE from the base station, a TRS burst containing a plurality of TRS symbols; and processing, by the processor of the UE, the TRS burst to perform at least one of time delay estimation, delay spread estimation, frequency offset estimation and Doppler spread estimation as a reference for other reference signals; wherein a symbol spacing between two neighboring TRS symbols in the TRS burst is greater than or equal to 3 symbols; wherein it is characterized in that the TRS configuration defines a plurality of parameters comprising: X = a length of the TRS burst in terms of a number of 14-symbol slots; N = a number of orthogonal frequency-division multiplexing, OFDM, symbols occupied by one or more TRS symbol of the plurality of TRS symbols within each slot; S t = a TRS symbol spacing between two neighboring TRS symbols of the plurality of TRS symbols in a time domain; X = a length of the TRS burst in terms of a number of 14-symbol slots; N = a number of orthogonal frequency-division multiplexing, OFDM, symbols occupied by one or more TRS symbol of the plurality of TRS symbols within each slot; S t = a TRS symbol spacing between two neighboring TRS symbols of the plurality of TRS symbols in a time domain; wherein, for the TRS burst, X = 2, N 1 = 2 for a first slot of the TRS burst, N 2 = 2 for a second slot of the TRS burst, and there are four TRS symbols in the TRS burst (N total = 4), wherein S t1 denotes a symbol spacing between a first TRS symbol in the first slot and a second TRS symbol in the first slot, wherein S t2 denotes a symbol spacing between the second TRS symbol in the first slot and a first TRS symbol in the second slot, wherein S t3 denotes a symbol spacing between the first TRS symbol in the second slot and a second TRS symbol in the second slot, and wherein S t2 is greater than or equal to S t3 which is greater than or equal to S t1 (S t2 >= S t3 >= Su).