Robust Frequency Hopping for Interference and Fading Channels

Abstract--A robust frequency-hopping system with noncoherent detection, iterative turbo decoding and demodulation, and channel estimation is presented. The data modulation is the spectrally compact nonorthogonal continuous-phase frequency-shift keying, which strengthens the frequency-hopping system against multiple-access interference and multitone jamming. An analysis based on information theory provides the optimal values of the modulation index when there is a bandwidth constraint. The channel estimator, which is derived by applying the expectationmaximization algorithm, accommodates both frequency-selective fading and interference. Simulation experiments demonstrate the excellent system performance against both partial-band and multiple-access interference.

• Type: Journal
• Year: 2008
• Where: TCOM
• Authors: Don J. Torrieri, Shi Cheng, Matthew C. Valenti
• Keywords: Continuous-phase Frequency-shift Keying, Data Modulation, Multiple-access Interference, TCOM 2008