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Cognitive optimization of the transmitter—receiver pair

Cognitive optimization of the transmitter—receiver pair

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In this chapter, cognition about the surrounding environment has been exploited to adapt the system to the interfering environment. Precisely, the robust joint optimization of the transmit signal and receive filter bank in the presence of signal-dependent interference has been considered. The Doppler shift of the moving target has been assumed unknown, and the worst case SINR at the output of the filter bank has been employed as figure of merit. By doing so, the effectiveness of the cognitive architecture has been investigated when the target Doppler frequency is a-priori unknown. In fact, while a rough Doppler knowledge is very reasonable during the detection confirmation or for an already tracked target, it is usually not available during the standard search radar operation and suitable cognitive algorithms are required.

Chapter Contents:

  • 5.1 Introduction
  • 5.2 System model and problem formulation
  • 5.2.1 System model
  • 5.2.2 The role of cognition for environmental awareness
  • 5.2.3 Code and receive filter bank optimization problem formulation
  • 5.3 Joint transmit receive design: solution-technique and analysis
  • 5.3.1 Performance analysis
  • 5.3.1.1 Monotonic property of the proposed method and the similarity constraint
  • 5.3.1.2 The effects of the colored interference and of the target Doppler shift interval
  • 5.3.1.3 Impact of receive filter bank size
  • 5.3.1.4 Comparison with other methods
  • 5.4 Conclusion
  • Appendix A Alternating optimization procedure to jointly design transmit signal and receive filter bank
  • A.1 Filter bank optimization: solution to problem Pw(n)
  • A.2 Radar code optimization: solution to problem Ps(n)
  • A.3 Transmit—receive system design: optimization procedure
  • References

Inspec keywords: radar tracking; target tracking; Doppler radar; channel bank filters; radar receivers; optimisation; radar interference; radar transmitters

Other keywords: radar interference; filter bank receiver; signal transmission; target Doppler frequency; cognitive radar; signal-dependent interference; Doppler shift; rough Doppler knowledge; search radar; target tracking; cognitive optimization; transmitter-receiver pair; SINR

Subjects: Optimisation techniques; Electromagnetic compatibility and interference; Radar equipment, systems and applications; Filtering methods in signal processing

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