Distributed analog-digital frequency dehopping system

摘要

A system and method for frequency dehopping of spread spectrum communication signals includes a downconverter having two mixer stages, each mixer stage providing coarse frequency dehopping. The local oscillator injection frequency of each mixer stage is selectable by way of a plurality of relatively easily generated tones. The output of the second mixer stage is sampled by an analog-to-digital converter to enable fine tuning dehopping to be performed in the digital domain and subsequently demodulated in a demodulator circuit.