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Time-Hardware Resource: A Criterion of Efficiency of Digital Signal Search&Detection Devices

Time-Hardware Resource: A Criterion of Efficiency of Digital Signal Search&Detection Devices. by Alexander Fridman Moscow Aviation Institute. Search & Detection Problem,1. Coherent accumulation:. Non-coherent accumulation:. Search & Detection Problem, 2. Decision rule where:

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Time-Hardware Resource: A Criterion of Efficiency of Digital Signal Search&Detection Devices

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  1. Time-Hardware Resource:A Criterion of Efficiency of Digital Signal Search&Detection Devices by Alexander Fridman Moscow Aviation Institute

  2. Search & Detection Problem,1 Coherent accumulation: Non-coherent accumulation:

  3. Search & Detection Problem, 2 Decision rule where: Number of search cells: n = 104…109 Search time = n * Dwell time

  4. Time-Hardware Resource THR = Search Time * Number of Gates:

  5. Necessary Time-Hardware Resource: • A measure of efficiency of the detection algorithm • A measure of efficiency of the hardware architecture • Dependence on SNR and search area size

  6. Detection Characteristics Necessary signal-to-noise ratio:

  7. Total search time: where: is Search-Time Factor SNR = input signal-to-noise ratio in dBHz

  8. Decreases with increasing number of non-coherent cycles Necessary Time-Hardware Resource decreases proportionally Total search time Search time factor

  9. Multi-channel correlator

  10. Multi-input adder (patented)

  11. Comparison example • Multi-channel correlator: • Multi-input adder:

  12. Conclusion • THR-analysis revealed: • The more non-coherent accumulation cycles the more efficient design is • Multi-input adder architecture is the most efficient • FFT-based architectures should be THR-analyzed

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