Abstract: Intra-array pilot measurements are performed with an antenna array of a MIMO transceiver. The antenna array comprises N transceive antennas. The antenna array is partitioned into K groups of antennas, Gk, k=1, . . . , K, wherein K?2, each group Gk comprising Nk antennas, Aki, i=1, . . . , Nk, of the antenna array. For each k=1, . . . , K, Sk pilot measurements, Mks, s=1, . . . , Sk, are performed, wherein Sk?1 and wherein each pilot measurement Mks comprises transmitting simultaneously by each antenna Aki, i=1, . . . , Nk, of the group Gk a pilot signal Pkis and generating by each antenna Ak?i?, i?=1, . . . , Nk?, of the other groups, Gk?, k??k, a received signal Ykk?i?s by receiving the pilot signals Pkis transmitted by the antennas Aki, i=1, . . . , Nk. The measurements can be performed in a mode for detecting whether current hardware impairment parameters are valid or in a mode for updating the hardware impairment parameters.

Abstract: Intra-array pilot measurements are performed with an antenna array of a MIMO transceiver. The antenna array comprises N transceive antennas. The antenna array is partitioned into K groups of antennas, Gk, k=1, . . . , K, wherein K?2, each group Gk comprising Nk antennas, Aki, i=1, . . . , Nk, of the antenna array. For each k=1, . . . , K, Sk pilot measurements, Mks, s=1, . . . , Sk, are performed, wherein Sk?1 and wherein each pilot measurement Mks comprises transmitting simultaneously by each antenna Aki, i=1, . . . , Nk, of the group Gk a pilot signal Pkis and generating by each antenna Ak?i?, i?=1, . . . , Nk?, of the other groups, Gk?, k??k, a received signal Ykk?i?s by receiving the pilot signals Pkis transmitted by the antennas Aki, i=1, . . . , Nk. The measurements can be performed in a mode for detecting whether current hardware impairment parameters are valid or in a mode for updating the hardware impairment parameters.