Time hardware resource a criterion of efficiency of digital signal search detection devices
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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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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:

Number of search cells:

n = 104…109

Search time = n * Dwell time


Time-Hardware Resource

THR = Search Time * Number of Gates:


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


Detection Characteristics

Necessary signal-to-noise ratio:


Total search time:

where:

is Search-Time Factor

SNR = input signal-to-noise ratio in dBHz


Decreases with increasing number of non-coherent cycles

Necessary Time-Hardware Resource decreases proportionally

Total search time

Search time factor


Multi-channel correlator


Multi-input adder (patented)


Comparison example

  • Multi-channel correlator:

  • Multi-input adder:


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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