Reliability Analysis of Open-Loop Switching Loran Signal Generator Using Omoe Indicator

Document Type : Original Article

Authors

1 ihu

2 Electrical and computer Eng. Malek Ashtar univ.

3 Imam hossein university

4 Imam Hossein University

Abstract

There are various parameters for conceptual design of a LORAN transmitter based on multi-level pulse width modulation (PWM), such as structural arrangement of amplifiers and number of modulation levels. The parameters should be considered in different aspects, such as implementation possibility, realization of LORAN signal standards and reliability analysis. In this paper, the overall measure of efectiveness (OMOE) indicator is used to simulate the reliability results of various open-loop LORAN transmitters based on multi-level PWM. So, by selecting the basic parameters and determining the weight of each parameter, the target value and the minimum acceptable value of each parameter, based on LORAN standards, are determined and OMOE is derived for several scenarios. The results of simulations show that the nine-level PWM arrangement is the most reliable structure. The OMOE of this structure is equal to 0.573, 0.506 and 0.451 (with average of 0.510) for the three states of all-safe amplifier blocks, and one- and two- damaged blocks, respectively. The average of this indicator for the same states are equal to 0.455, 0.463 and 0.485 for pulse amplitude modulation, and seven- and eleven-levels PWM structures, respectively, which have smaller values relative to the optimum structure. 
 

Keywords

References

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History

  • Receive Date: 22 July 2019
  • Revise Date: 01 September 2019
  • Accept Date: 23 October 2019
  • Publish Date: 22 August 2020

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