Abstract: A receiver for receiving data signals which include data symbols C(k) having a symbol Baud rate. A local oscillator generates a local Baud rate clock for sampling a received signal, a symbol detector recovers the symbols C(k) from the signal samples, and an arithmetic processor circuit derives for each sample an error signal e(k) which is a measure of the phase difference between the local Baud rate clock and the symbol Baud rate clock of the received signal. A reference circuit generates a reference signal V.sub.r (k) which is proportional to the amplitude of the received symbols. The receiver further includes a control circuit (11) for forming from the signals C(k), e(k) and V.sub.r (k) a pair of control signals .DELTA.F and .DELTA..phi. which adjust the frequency and phase of the clock oscillator so as to reduce the aforesaid phase difference.