Compressive digital receiver: first results on sensitivity, dynamic range and instantaneous bandwidth measurements

Abstract

In this work, sensitivity, one/two-signal dynamic range and instantaneous bandwidth measurement results of the recently developed Compressive Digital Receiver (CDR) hardware for Electronic Support Measures (ESM) applications, will be reported for the first time. Developed CDR is a compressive sensing based sub-Nyquist sampling receiver, which can monitor 2.25 GHz bandwidth instantaneously by using four ADCs (Analog-to-Digital Receiver) each of which has a sampling rate of 250 MHz. All the digital processing blocks of the CDR are implemented in Field Programmable Gate Array (FPGA) and they work in real time. It is observed that the sensitivity and dynamic range of the CDR changes with respect to input signal frequency. For 2.25 GHz bandwidth, the best and worst sensitivity values of the CDR are reported as -62 dBm and -41 dBm, respectively. One-signal dynamic range of CDR is measured as at least 60 dB for the whole band. The best and worst values of the two-signal dynamic rage values are observed as 42 dB and 20 dB, respectively.