This chapter discusses pulse compression with sufficient Doppler tolerance may be achieved using polyphase codes derived from linear and nonlinear frequency modulation.

Chapter Contents:

• 7.1 Introduction
• 7.2 Requirements and basic structure for pulse compression
• 7.3 Binary phase codes
• 7.4 Polyphase code as an approximation of linear frequency modulation
• 7.5 Reduction of range sidelobes
• 7.5.1 Application of a weighting function
• 7.5.2 Application of a mismatched LS filter
• 7.5.3 Application of an estimation filter
• 7.6 Reduction of sidelobes by a phase code from nonlinear frequency modulation
• 7.7 Complementary codes
• 7.8 Polyphase code with periodic repetition
• 7.9 Pulse eclipsing
• 7.10 High range resolution by oversampling and LS pulse compression
• 7.10.1 Calculation of the filter function for them pulse compression
• 7.10.2 Subpulse filter
• 7.10.3 Gain or S/N loss
• 7.10.4 Pulse compression of simulated signals
• 7.10.5 Compression of measured echo signals
• 7.11 Conclusions
• References

Inspec keywords: pulse compression; frequency modulation; radar signal processing; Doppler radar; phase coding

Other keywords: nonlinear frequency modulation; Doppler tolerance; polyphase codes; pulse compression

Subjects: Radar theory; Codes; Signal processing and detection; Radar equipment, systems and applications