Method for adaptive transmitter symbol arrangement in delay-Doppler domain grids sequentially transmitted using an Orthogonal Time Frequency Space Modulation with channel estimation, wherein said delay-Doppler domain grids are two dimensional grids having a time-like delay dimension associated with a time basis and the other frequency-like Doppler dimension associated with a frequency basis, and wherein the transmitter symbols comprise at least one pilot symbol, guard symbols and data symbols, said method comprising the steps of: a) retrieve one or several current communication relevant parameters; b) derive from the one or several current communication relevant parameters at least - a maximum expected Doppler frequency shift for a transmitted signal and wherein a first guard space parameter is equal to twice the absolute value of the maximum expected Doppler frequency shift; and - a maximum expected time delay for a transmitted signal as a second guard space parameter; c) place at least one pilot symbol in a delay-Doppler domain grid; d) place a minimum number of guard symbols around the at least one pilot symbol in the delay-Doppler domain grid such that the guard symbols occupy a guard space around the at least one pilot such that any grid position outside the guard space around the at least one pilot has a distance along the first grid direction exceeding the derived first guard space parameter and also has a distance along the second grid direction that exceeds the second guard space parameter; e) place data symbols in the delay-Doppler domain grid outside the guard space for data transmission; wherein the steps a) to e) are iteratively carried out to adapt the minimum required number of guard symbols around the at least one pilot symbol. wherein said delay-Doppler domain grids are two dimensional grids having a time-like delay dimension associated with a time basis and the other frequency-like Doppler dimension associated with a frequency basis, and wherein the transmitter symbols comprise at least one pilot symbol, guard symbols and data symbols, said method comprising the steps of: a) retrieve one or several current communication relevant parameters; b) derive from the one or several current communication relevant parameters at least - a maximum expected Doppler frequency shift for a transmitted signal and wherein a first guard space parameter is equal to twice the absolute value of the maximum expected Doppler frequency shift; and - a maximum expected time delay for a transmitted signal as a second guard space parameter; c) place at least one pilot symbol in a delay-Doppler domain grid; d) place a minimum number of guard symbols around the at least one pilot symbol in the delay-Doppler domain grid such that the guard symbols occupy a guard space around the at least one pilot such that any grid position outside the guard space around the at least one pilot has a distance along the first grid direction exceeding the derived first guard space parameter and also has a distance along the second grid direction that exceeds the second guard space parameter; e) place data symbols in the delay-Doppler domain grid outside the guard space for data transmission; a) retrieve one or several current communication relevant parameters; b) derive from the one or several current communication relevant parameters at least - a maximum expected Doppler frequency shift for a transmitted signal and wherein a first guard space parameter is equal to twice the absolute value of the maximum expected Doppler frequency shift; and - a maximum expected time delay for a transmitted signal as a second guard space parameter; - a maximum expected Doppler frequency shift for a transmitted signal and wherein a first guard space parameter is equal to twice the absolute value of the maximum expected Doppler frequency shift; and - a maximum expected time delay for a transmitted signal as a second guard space parameter; c) place at least one pilot symbol in a delay-Doppler domain grid; d) place a minimum number of guard symbols around the at least one pilot symbol in the delay-Doppler domain grid such that the guard symbols occupy a guard space around the at least one pilot such that any grid position outside the guard space around the at least one pilot has a distance along the first grid direction exceeding the derived first guard space parameter and also has a distance along the second grid direction that exceeds the second guard space parameter; e) place data symbols in the delay-Doppler domain grid outside the guard space for data transmission; wherein the steps a) to e) are iteratively carried out to adapt the minimum required number of guard symbols around the at least one pilot symbol.