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

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

by

Alexander Fridman

Moscow Aviation Institute

search detection problem 1
Search & Detection Problem,1

Coherent accumulation:

Non-coherent accumulation:

search detection problem 2
Search & Detection Problem, 2

Decision rule

where:

Number of search cells:

n = 104…109

Search time = n * Dwell time

time hardware resource
Time-Hardware Resource

THR = Search Time * Number of Gates:

necessary time hardware resource
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
Detection Characteristics

Necessary signal-to-noise ratio:

total search time
Total search time:

where:

is Search-Time Factor

SNR = input signal-to-noise ratio in dBHz

total search time1
Decreases with increasing number of non-coherent cycles

Necessary Time-Hardware Resource decreases proportionally

Total search time

Search time factor

comparison example
Comparison example
  • Multi-channel correlator:
  • Multi-input adder:
conclusion
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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