Performance of Kalman decision-feedback equalization in HF radio modems

Russell John Tront
The performance of fast-adapting Kalman algorithms in adjusting the tap weights of digital equalizers for high-speed, serial HF radio modems is investigated. Experiments on a large realistic set of simulated HF channels, and on some actual channels, have been conducted using 2400 bps QPSK. Results are presented for linear and decision-feedback equalizers with symbol and half-symbol (fractionally) spaced taps. The bit error rate and the optimum values of several algorithmic parameters in reference-directed mode, and...
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