Wagner, ChristophChristophWagnerRömer, FlorianFlorianRömerSemper, SebastianSebastianSemperDel Galdo, GiovanniGiovanniDel Galdo2022-03-082022-03-082021https://publica.fraunhofer.de/handle/publica/312346There are disclosed techniques (e.g., apparatus, methods) for estimating an impulse response (30) of a linear system (4).An apparatus (100) may be configured to generate (7) a transmit signal (23) on the basis of a first sequence. The apparatus (100) may be configured to obtain a receive signal (24) and to multiply (9) the receive signal (24) with a second sequence (25), to obtain a modified receive signal (26), wherein the second sequence (25) is different from the first sequence. The apparatus (100) may be configured to analog-to-digital, ADC, convert (11) an integration result (27) in order to obtain a sample value (28), the integration result (27) being based on an integration (10) of the modified receive signal (26) over a period (Ts) of time. The apparatus (100) may be configured to obtain an estimate (30) of the impulse response on the basis of a plurality (29) of sample values (28).en621006patent3806413