Accession Number : ADA132651

Title :   Decision Feedback Equalizer Test Results for HF Skywave Communications. Design Trade-Offs and Performance Data are Presented for Kalman and LMS-Decision Feedback Equalizers.

Descriptive Note : Technical document,

Corporate Author : NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA

Personal Author(s) : Hoff,L E ; King,A R

PDF Url : ADA132651

Report Date : 30 Sep 1982

Pagination or Media Count : 44

Abstract : Simulation results which address the design trade-offs of Decision Feedback Equalizers (DFE) using the Kalman and LMS algorithms are presented. Test results are given on varying the transmitted reference, equalization loop bandwidth, equalizer tap positioning, and synchronization. The DFE performance on fading multipath channels is compared to switching diversity and the impact of path separation is shown. Performance results are given for both simulated and measured HF channels. Simulation results show that the Kalman DFE performs as well or better than the LMS DFE or parallel tone modems and out performs them when there are multiple fading signal skywave paths. (Author)

Descriptors :   *Radio equipment, *Ionospheric propagation, *Kalman filtering, *Multipath transmission, Fading(Electromagnetic waves), Least squares method, Modems, Communication equipment, Decision making, Performance(Engineering), High frequency, Switching circuits, Separation, Channels, Simulation, Paths, Equalization, Switching, Bandwidth, Impact, Audio tones, Loops, Algorithms

Subject Categories : Statistics and Probability
      Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE