An adaptive digital receiver for HF communication

The fading characteristics of the HF channel make communication over this channel difficult, even at moderate data rates. An adaptive receiver for data detection and adaptive optimization to the channel parameters is presented. The channel tracking is performed during the training sequence as well as during the detected data sequence. The receiver is fast converging, therefore suitable for frequency hopping. The paper presents an improved version of the adaptive receiver, compared to the version presented by Perl, Shpigel and Reichman (see IEE Journal on Selected Areas in Communication, vol.SAC-5, no.2, p.304, 1987). The improvement is in the required computational complexity without loss in performance. The performance obtained on simulated HF channels and the computational complexity are presented, via comparisons with previously published results.<>