A four-channel GNSS front-end IC for a compact interference- and jamming-robust multi-antenna Galileo/GPS receiver

Abstract

We present a four-channel GNSS front-end IC for a compact interference- and jammer-robust multi-antenna sub-sampling receiver for Galileo El-B/C and GPS LI signals. The front end includes four coherent RF-to-IF signal paths with an intermediate frequency of 75.42 MHz, a common PLL frequency synthesizer, which generates the 1500-MHz local-oscillator signal, and an I2C interface for parameter adjustment. The front end exhibits a gain of 83 dB, a noise figure of 2.8 dB, and an input-referred 1-dB compression point of -73.5 dBm preventing the front end from saturation while jammed. A path-to-path isolation of at least 30 dB leads to a high spatial resolution. The power consumption is 231.7 mW and 255.7 mW with and without interferers, respectively.