The concept of RCEC has been proposed, with the prospect of various different communication symbol and receive filter design strategies. Several of these symbol/filter designs were examined from the perspective of spectral containment, processing gain, probability of detection, and SER. Of the three proposed symbol designs, it was shown that the DP method of embedding communication symbols into clutter is the most effective from the perspectives of detectability, SER, and interference at the radar receiver. This symbol design offers significant improvements over a traditional DSSS design strategy. Finally, simulation results show that the DLDF provides the most robust performance for all symbol designs, independent of the incident clutter power.

Chapter Contents:

• 21.1 Introduction
• 21.1.1 Practical considerations
• 21.2 RCEC symbol design
• 21.2.1 Signal model
• 21.2.2 Direct-sequence spread-spectrum
• 21.2.3 Eigenvectors as waveforms
• 21.2.4 Dominant projection
• 21.2.5 Shaped dominant projection
• 21.2.6 Shaped waterfilling
• 21.3 Receiver design
• 21.3.1 Matched filter
• 21.3.2 Maximum likelihood (ML) decorrelating filter (DF)
• 21.3.3 Diagonally loaded decorrelating filter
• 21.3.4 Two-stage Neyman–Pearson detector
• 21.4 Performance evaluation
• 21.4.1 Spectral content
• 21.4.2 Processing gain
• 21.4.3 Probability of detection and symbol error rate
• 21.5 Conclusions
• 21.6 Looking ahead
• References

Inspec keywords: radar interference; probability; radar receivers; spread spectrum communication; radar clutter; nomenclature; code division multiple access

Other keywords: radar clutter; direct-sequence spread-spectrum; traditional DSSS design strategy; DLDF; dominant projection method; intrapulse basis; RCEC concept; symbol/filter designs; receive filter design strategies; radar receiver; DP method; spectral containment; incident clutter power; embedding communication symbols; probability of detection; processing gain; SER

Subjects: Other topics in statistics; Radio links and equipment; Electromagnetic compatibility and interference; Radar theory; Radar equipment, systems and applications