Multichannel Receiver Characterization for Adaptive Array Applications. Phase 3: Assessment of the Bistatic Receiver Testbed as a Measurement Tool for Clutter Phenomenology

Abstract

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Multichannel Receiver Characterization for Adaptive Array Applications Phase 5: Experiments/DSP Software

“…Optical fiber cable is available for the transmission of Figure 2.4 Optical transmitter [6,8] timing and RF signals between the Tanner Hill and Irish Hill sites. The bistatic testbed shelter is located on Irish Hill and uses this optical link to send transmit signals to a TWT transmitter located on Tanner Hill.…”

“…An earlier interim document [6] characterized the receiver and made recommendations for improving the system's linear dynamic range. For a modest increase in noise figure (.85 dB), the linear dynamic range for third order distortion could be increased close to the limitation provided by the "10 "effective bits" advertized for the 11 bit A/D converter [13].…”

“…A multi-phase effort was performed to assist AFRL in the development of the existing multichannel receiver into a multi-use bistatic testbed. The first phase report [6] provided an evaluation of the existing system with recommendations for improving performance. The second phase recommended the procedures and post-A/D algorithms for maintaining real-time calibration of the adaptive array receiver [7].…”

“…The first phase report [6] provided an evaluation of the existing system with recommendations for improving performance. The second phase recommended the procedures and post-A/D algorithms for maintaining real-time calibration of the adaptive array receiver [7]. The third task presented an assessment of the existing adaptive array receiver's utility for investigating clutter phenomenology and defined two experiments that demonstrate the capabilities of AFRL's adaptive receiver's capabilities [8].…”

“…The second phase recommended the procedures and post-A/D algorithms for maintaining real-time calibration of the adaptive array receiver [7]. The third task presented an assessment of the existing adaptive array receiver's utility for investigating clutter phenomenology and defined two experiments that demonstrate the capabilities of AFRL's adaptive receiver's capabilities [8]. The fourth task developed procedures for using the calibrated transponder in the radar cross section measurements of clutter and targets and demonstrated these procedures in the measurement of the local clutter environment [9].…”