We have designed and tested a digital receiver suitable for the reception of 6 GHz instantaneous baseband signals. It is based on a Tektronix TADC-1000 12.5-GS/s 8-bit digitiser module, a Tektronix TIPA-3100 HAPS Interposer board and a Synopsys HAPS62-Virtex6 Prototyping Motherboard. This motherboard is also employed for filtering and signal processing. The ADC module uses an external clock from the interposer board and can accept a range of input clock frequencies between 1.6 and 3.125 GHz, resulting in sample rates of between 8 and 12.5 GS/s in single-channel mode. The external clock and digital data are supplied to and processed via the HAPS62 board. A 2048-channel weighted overlap-add (WOLA) and FFT structure separate the input signal into approximately 5-MHz sub-bands to allow subsequent high-resolution processing to obtain continuous spectral information over the input bandwidth.This system meets present-day demands on high-resolution wideband digital back-ends for RF spectrum monitoring. This technology could be part of the next generation wideband signal intercept systems for the future detection, classification and location of modern complex RF signals.

No abstract

No abstract