A Dual Stage Linear Predictive Approach Towards Wideband FM Demodulation with Multilevel and Partial Response Signaling
Abstract
Continuous Phase Modulation (CPM) is a constant modulus modulation scheme that is commonly used in modern wireless systems due to its spectral efficiency. Multilevel M-FSK, one specific form of discrete FM, with partial response signaling has been suggested recently for increased bandwidth demands in satellite communication systems. Conventional CPM demodulation for small depth parameters is typically done by using in-phase and quadrature demodulation of the phase followed by Vitterbi detection. In this proposal, we propose a novel approach towards wideband CPM demodulation that employs multilevel signaling and partial response signaling that uses a two stage linear prediction approach with multi-rate systems to enact wideband FM demodulation. The first stage is used to demodulate the wideband FM signal, using multi-rate signal processing for wideband to narrowband conversion, while the second stage is used to remove memory induced by the partial response signaling from the estimated instantaneous frequency.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 17, 2018
- Source ID
- FA94531610067
Entities
People
- Balu Santhanam
Organizations
- Air Force Research Laboratory
- United States Department of Defense
- University of New Mexico