The link adaptation process for selecting a physical layer mode used on a
radio link for transmitting symbols of a message between two stations of
a wireless communication system among a set of potential physical layer
modes comprises the steps of: --evaluating the current radio link
conditions; and switching from a current physical layer mode to another
physical layer mode by applying a criteria depending on the evaluated
current radio link conditions. The evaluation step of the current radio
link conditions comprises the calculation of a received modulation
accuracy (RMA) for at least a part of the message, the received
modulation accuracy (RMA) being de-fined as the inverse of the
expectation of a quadratic error for a predetermined number of symbols
between demodulated received symbol values and ideal symbol values and in
that the criteria is at least partially dependent on the calculated
received modulation accuracy (RMA).