Frequency offset correction for HF radio speech reception

High-frequency single-sideband (HF-SSB) radio communication suffers from hi ghly variable propagation conditions and high levels of interference noise. One common distortion is frequency shifting of the received signal due to differences in carrier frequencies at transmitter and receiver or to Dopple r shifts due to the transmission path. This paper presents a novel and effi cient technique to compensate for this frequency offset using only the rece ived speech signal to determine and correct the frequency error. Good impro vement in received speech quality is achieved, using a mean opinion score m easurement.