Receiver of a system for transmitting data symbols at a given baud-rate

Abstract

Abstract A receiver of a system for transmitting data symbols at a given baud-rate comprises a symbol detector (7) operating at the baud-­rate 1/T and means (6) for optimally conditioning received data symbols for this symbol detection. From the received conditioned data signal [s(k)] a phase error signal [e(k-1).ĉ(k)] is derived that is representative of a phase difference between a locally generated baud-­rate clock signal and a baud-rate clock signal inherent to the received data symbols, and the receiver comprises means (11, 12) for the reduction of this phase difference step-by-step in response to the phase error signal [e(k - 1).ĉ(k)]. This receiver further includes an accumulator (44) for determining the mean value [u(k)] of the phase error signal over a predetermined number (M) of symbol intervals and a detector (45) for establishing whether this mean value [u(k)] is situated in a zone whose boundaries [±V r (k)/N] are determined by a given fraction (1/N, N > 1) of the level [V r (k)] of the conditioned signal [s(k)]. If the mean value [u(k)] of the phase error signal is situated in this zone, the process of shifting the phase of the local clock signal step-by-step is stopped.

Inventors

• 👤 Simon Johannes Maria Tol
• 👤 Kornelis Jan Wouda

Bibliographic Details