An LPIS must be designed to counter many different current intercept receivers. Any LPIS design also must anticipate future intercept threat trends. There are several trends in both airborne warning receivers and ground-based receivers that will continue well into the future. This chapter provides an overview of the general operating techniques for six separate types of intercept receiver implementations. Second, intercept receiver performance limitations are discussed. Third, possible future threats are analyzed. Finally, two LO/LPI countermeasures for intercept receivers are suggested.

Chapter Contents:

• 3.1 Survey of Current and Future Intercept Receivers
• 3.2 Receiver Types (Similar to Schleher)
• 3.2.1 Crystal Video Receiver
• 3.2.2 Instantaneous Frequency Measurement
• 3.2.3 Scanning Superheterodyne Receivers
• 3.2.4 Channelized Receivers
• 3.2.5 Transform Intercept Receivers
• 3.2.6 Hybrid or Cueing Receivers
• 3.2.7 Intercept Receiver Processing
• 3.3 Interceptor Measurement Accuracy
• 3.3.1 Frequency Measurement
• 3.3.2 Pulse Amplitude and Width Measurement
• 3.3.3 Time of Arrival and PRI Measurement
• 3.3.4 Angle of Arrival Measurement
• 3.3.5.1 Amplitude Angle of Arrival
• 3.3.6.2 Phase Angle of Arrival
• 3.3.7 Range Estimation
• 3.4 Intercept Receiver Threat Trends
• 3.4.1 Typical Response Threats - Elastic Threat
• 3.4.2 Corresponding Specification of LPIS Emissions
• 3.4.3 Typical Response Threats - Radiometric
• 3.4.4 Typical Response Threats - Correlation
• 3.5 LPIS versus Interceptor
• 3.5.1 Screening Jamming
• 3.5.2 Spoofing
• 3.6 Typical Deployed Intercept Receivers
• 3.7 Exercises
• 3.8 References

Inspec keywords: design; radio receivers

Other keywords: LPIS design; airborne warning receivers; intercept receivers; LO/LPI countermeasures; ground-based receivers

Subjects: Radio links and equipment