OTFS Based Joint Radar and Communication: Signal Analysis Using the Ambiguity Function
Shalanika Dayarathna, Peter J. Smith, Rajitha Senanayake, Jamie Evans
Abstract
Orthogonal time frequency space (OTFS) modulation has recently been identified as a suitable waveform for joint radar and communication systems. Focusing on the effect of data modulation on the radar sensing performance, we derive the ambiguity function (AF) of the OTFS waveform and characterize the radar global accuracy. We evaluate the behavior of the AF with respect to the distribution of the modulated data and derive an accurate approximation for the mean and variance of the AF, thus, approximating its distribution by a Rice distribution. Finally, we evaluate the global radar performance of the OTFS waveform with the OFDM waveform.
Topics & Concepts
Ambiguity functionAmbiguityJoint (building)Computer scienceRadarSignal processingSIGNAL (programming language)Function (biology)Radar signal processingTelecommunicationsArtificial intelligenceEngineeringBiologyArchitectural engineeringWaveformProgramming languageEvolutionary biologyRadar Systems and Signal ProcessingPAPR reduction in OFDMAdvanced SAR Imaging Techniques