109. AN EFFICIENT FULL DIGITAL FREQUENCY HOPPING MODEM BASED ON POLYPHASE FILTER BANKS

Department: Electrical & Computer Engineering
Faculty Advisor(s): Bhaskar Rao | Fredric Harris
Award(s): Honorable Mention

Primary Student
Name: Xiaofei Chen
Email: xic001@ucsd.edu
Phone: 619-944-3545
Grad Year: 2013

Student Collaborators
Elettra Venosa, Elettra.VENOSA@unina2.it

Abstract
Frequency-hopped spread spectrum (FHSS) is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. FHSS systems present a number of advantages which include resistance to narrow band interference, being difficult to intercept and being capable of sharing spectrum with many types of existing transmissions. Today, FHSS technique is widely used in many military radio applications as well as commercial applications in the license-free industrial, scientific and medical bands. In this paper, we propose a full digital FHSS modem, which allows us to de-hop the hopping sequence in the digital domain while keeping the system operating at lower sampling rates. By designing the Tx/Rx in the digital domain, the proposed architecture enables a number of advantages over the legacy FHSS radios.

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