“…The practical limitation of a conventional OFDM system [3] is the requirement of analog-to-digital (ADC) and digital-to-analog converters (DAC) with sampling rates of some gigahertz, depending on the desired range resolution. However, it is introduced in [4], [5] and extended in [6] that a stepped-OFDM scheme with an agile carrier that alters after each symbol, forming a regular pattern, can solve this constraint at the cost of reduced unambiguity in velocity. In this paper, a method is proposed that allows to determine the velocity of a target even if it is above the unambiguous velocity limitation of the stepped-carrier OFDM scheme.…”