FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4387092289> ?p ?o ?g. }

• W4387092289 endingPage "20" @default.
• W4387092289 startingPage "1" @default.
• W4387092289 abstract "In our first paper [2] we explained why the Zak-OTFS input-output (I/O) relation is predictable and non-fading when the delay and Doppler periods are greater than the effective channel delay and Doppler spreads, a condition which we refer to as the crystallization condition. We argued that a communication system should operate within the crystalline regime. It is well known that it is possible to identify a linear time varying (LTV) channel if and only if it is under-spread. The crystallization condition is more restrictive than the under-spread condition, so identification is always possible. In the crystalline regime, we show that Zak-OTFS pilot sequences minimize the complexity of identifying the effective DD domain channel filter. We demonstrate that the filter taps can simply be read off from the response to a single Zak-OTFS pilot. In general, we provide an explicit formula for reconstructing the Zak-OTFS I/O relation from a finite number of received pilot symbols in the delay- Doppler (DD) domain. This reconstruction formula makes it possible to study predictability of the Zak-OTFS I/O relation for a sampled system that operates under finite duration and bandwidth constraints. We analyze reconstruction accuracy for different choices of the delay and Doppler periods, and of the pulse shaping filter. Reconstruction accuracy is high when the crystallization condition is satisfied, implying that it is possible to learn directly the I/O relation without needing to estimate the underlying channel. This opens up the possibility of a model-free mode of operation, which is especially useful when a traditional model-dependent mode of operation (reliant on estimation of the underlying physical channel) is out of reach (for example, when the channel comprises of unresolvable paths, or exhibits a continuous delay- Doppler profile such as in presence of acceleration). Our study clarifies the fundamental origins of predictability by revealing how non-predictability appears as a consequence of aliasing in the DD domain. This perspective leads to a canonical decomposition of the effective DD channel as a sum of predictable and non-predictable components, which we refer to as the crystalline decomposition. Vanishing of the non-predictable component of the channel is equivalent to satisfying the crystallization condition. Finally, we measure the benefits of predictability in terms of bit error rate (BER) performance. We consider two cases. In the first, we measure performance given perfect knowledge of the I/O relation. We show that performance is optimal when the crystallization condition holds, that performance approaches that of Time Domain Modulation (TDM) when the Doppler period vanishes, and approaches that of Frequency Domain Modulation (FDM) when the delay period vanishes. In the second, we measure performance given imperfect knowledge of the I/O relation, as is the case when it is not possible to learn the underlying channel. We show that model-free operation is successful when the crystallization condition holds, and that performance is only slightly worse than performance given perfect knowledge of the I/O relation. We also compare the performance of Zak-OTFS with that of a well-studied conventional multi-carrier approximation to Zak-OTFS, which we refer to as MC-OTFS. We show that the I/O relation of MC-OTFS is predictable to a lesser degree than that of Zak-OTFS, and as a result the performance of MC-OTFS is inferior as the Doppler spread increases." @default.
• W4387092289 created "2023-09-28" @default.
• W4387092289 creator A5011641198 @default.
• W4387092289 creator A5037795370 @default.
• W4387092289 creator A5070481781 @default.
• W4387092289 creator A5076764000 @default.
• W4387092289 date "2023-01-01" @default.
• W4387092289 modified "2023-10-16" @default.
• W4387092289 title "OTFS - Predictability in the Delay- Doppler Domain and Its Value to Communication and Radar Sensing" @default.
• W4387092289 doi "https://doi.org/10.1109/mbits.2023.3319595" @default.
• W4387092289 hasPublicationYear "2023" @default.
• W4387092289 type Work @default.
• W4387092289 citedByCount "0" @default.
• W4387092289 crossrefType "journal-article" @default.
• W4387092289 hasAuthorship W4387092289A5011641198 @default.
• W4387092289 hasAuthorship W4387092289A5037795370 @default.
• W4387092289 hasAuthorship W4387092289A5070481781 @default.
• W4387092289 hasAuthorship W4387092289A5076764000 @default.
• W4387092289 hasConcept C103824480 @default.
• W4387092289 hasConcept C105795698 @default.
• W4387092289 hasConcept C106131492 @default.
• W4387092289 hasConcept C11413529 @default.
• W4387092289 hasConcept C121332964 @default.
• W4387092289 hasConcept C124101348 @default.
• W4387092289 hasConcept C127162648 @default.
• W4387092289 hasConcept C127413603 @default.
• W4387092289 hasConcept C1276947 @default.
• W4387092289 hasConcept C134306372 @default.
• W4387092289 hasConcept C142757262 @default.
• W4387092289 hasConcept C154945302 @default.
• W4387092289 hasConcept C19118579 @default.
• W4387092289 hasConcept C197640229 @default.
• W4387092289 hasConcept C24326235 @default.
• W4387092289 hasConcept C25343380 @default.
• W4387092289 hasConcept C2775924081 @default.
• W4387092289 hasConcept C2776257435 @default.
• W4387092289 hasConcept C31972630 @default.
• W4387092289 hasConcept C33923547 @default.
• W4387092289 hasConcept C41008148 @default.
• W4387092289 hasConcept C47446073 @default.
• W4387092289 hasConcept C76155785 @default.
• W4387092289 hasConcept C81978471 @default.
• W4387092289 hasConceptScore W4387092289C103824480 @default.
• W4387092289 hasConceptScore W4387092289C105795698 @default.
• W4387092289 hasConceptScore W4387092289C106131492 @default.
• W4387092289 hasConceptScore W4387092289C11413529 @default.
• W4387092289 hasConceptScore W4387092289C121332964 @default.
• W4387092289 hasConceptScore W4387092289C124101348 @default.
• W4387092289 hasConceptScore W4387092289C127162648 @default.
• W4387092289 hasConceptScore W4387092289C127413603 @default.
• W4387092289 hasConceptScore W4387092289C1276947 @default.
• W4387092289 hasConceptScore W4387092289C134306372 @default.
• W4387092289 hasConceptScore W4387092289C142757262 @default.
• W4387092289 hasConceptScore W4387092289C154945302 @default.
• W4387092289 hasConceptScore W4387092289C19118579 @default.
• W4387092289 hasConceptScore W4387092289C197640229 @default.
• W4387092289 hasConceptScore W4387092289C24326235 @default.
• W4387092289 hasConceptScore W4387092289C25343380 @default.
• W4387092289 hasConceptScore W4387092289C2775924081 @default.
• W4387092289 hasConceptScore W4387092289C2776257435 @default.
• W4387092289 hasConceptScore W4387092289C31972630 @default.
• W4387092289 hasConceptScore W4387092289C33923547 @default.
• W4387092289 hasConceptScore W4387092289C41008148 @default.
• W4387092289 hasConceptScore W4387092289C47446073 @default.
• W4387092289 hasConceptScore W4387092289C76155785 @default.
• W4387092289 hasConceptScore W4387092289C81978471 @default.
• W4387092289 hasLocation W43870922891 @default.
• W4387092289 hasOpenAccess W4387092289 @default.
• W4387092289 hasPrimaryLocation W43870922891 @default.
• W4387092289 hasRelatedWork W2058974968 @default.
• W4387092289 hasRelatedWork W2148060934 @default.
• W4387092289 hasRelatedWork W2166486655 @default.
• W4387092289 hasRelatedWork W2361065066 @default.
• W4387092289 hasRelatedWork W2362773848 @default.
• W4387092289 hasRelatedWork W2370295193 @default.
• W4387092289 hasRelatedWork W2372698348 @default.
• W4387092289 hasRelatedWork W2376212674 @default.
• W4387092289 hasRelatedWork W2383612990 @default.
• W4387092289 hasRelatedWork W2386642901 @default.
• W4387092289 isParatext "false" @default.
• W4387092289 isRetracted "false" @default.
• W4387092289 workType "article" @default.