Total reliability of radar systems: incorporating component degradation effects in operational reliability

Ridder, Tyler D.; Narayanan, Ram M.

doi:10.1117/12.2519725

Cited by 3 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this section, the degradation of the low noise amplifier (LNA) and the phased array will be investigated. Previous work has been done to shown how the degradation of these components affect the performance of a radar at a conceptual level [2]. This paper expands on the prior work by applying component degradation to a holistic model of a radar's reliability by comprehensively modeling the radar system, including simulating the entire radar signal processing engine.…”

Section: Component Degradation Considerations In Radarmentioning

confidence: 98%

See 1 more Smart Citation

Radar Detection Performability under Graceful Degradation

Ridder

Narayanan²

2021

Int J Performability Eng

View full text Add to dashboard Cite

Operational reliability has been introduced recently as a useful metric to describe the performability of a radar's signal processing system. In this paper, the concept of operational reliability is investigated for a typical radar scenario in which a phased array radar on an airborne platform is tasked with detecting a vehicle on the ground. Various background clutter scenarios are modeled in order to study the effects of clutter type on operational reliability and the associated optimal threshold. The effects of radar component degradation on operational reliability are investigated for two different radar system components: the receiver chain low noise amplifier and the phased array antenna. The gain degradation of the low-noise amplifier and element failures in the phased array antenna are modeled and applied to the operational reliability calculations under the various clutter scenarios. By adjusting the detection threshold adaptively, it is seen that the operational reliability can be optimally tuned and maximized even under graceful degradation conditions.

show abstract

Section: Component Degradation Considerations In Radarmentioning

confidence: 98%

“…In a target detection application, a radar processes the received signal and makes a decision between two hypotheses: target present and target not present. Metrics for operational reliability to assess a radar system's detection performability under clutter conditions have been proposed and investigated [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Radar Detection Performability under Graceful Degradation

Ridder

Narayanan²

2021

Int J Performability Eng

View full text Add to dashboard Cite

show abstract

“…Every component in the radar is considered critical and thus degradation of each component will have a direct impact on the radar's overall performability and reliability. Our previous work examines how the degradation of the low noise amplifier (LNA) in the receiver chain affects the performance of the radar [23].…”

Section: Application Of Operational Reliability To Radar Detectionmentioning

confidence: 99%

“…In such a scenario, the operational reliability can be set such that more weight is placed on the probability of detection compared to the probability of false alarm. Two examples of such definitions of operational reliability are shown in (22) and (23).…”

Section: Alternative Operational Reliability Definitionsmentioning

confidence: 99%

“…It is clearly seen that the operational reliability formulation in ( 22) and ( 23) are more dependent on and are closer to the value of 𝑃𝑃 D than that given by (3). Thus, ( 22) and ( 23) would be logical choices for a user who determines target detection is of high importance, with ( 22) more heavily weighted towards probability of detection compared to (23). The three definitions of operational reliability given in this paper do not purport to be an exhaustive list of the possible operational reliability equations.…”

Section: Alternative Operational Reliability Definitionsmentioning

confidence: 99%

See 1 more Smart Citation

Operational Reliability Metric to Characterize Radar Detection Performability

Ridder¹,

Narayanan²

2021

Int J Performability Eng

View full text Add to dashboard Cite

Historically, reliability studies of electronic systems, including radar, have primarily focused on the trustworthiness and endurance of the hardware components of the system. While the radar's hardware is indeed a crucial part of the system, the signal processing aspects of the radar and the actual operating conditions, such as the environment and aging, have been neglected in previous reliability studies. In this paper, the operational reliability paradigm is used to analyze the parameters of the radar's signal processor and their effects on the radar's target detection performance while in service. A detection threshold is derived using the operational reliability formulation which can be optimized for given target and clutter statistics.

show abstract