Communication system and method with determination of channel parameters

The invention relates to a device and a method for determining channel parameters of a transmission channel (3) in a communication system. The communication system comprises at least a transmitter (1) and at least one receiver (2), wherein a determination of the channel parameters in the receiver (2) is provided. Over a closed, the transmission channel (3) comprising signaling loop is a retransmission of the channel parameters to the transmitter (1), wherein an acknowledgment mode is provided for the operation of the communication system. The confirmation mode is realized in the closed signaling loop means to be transmitted acknowledgment packets (5), by the transmitter (1) containing the receiver ruckzuubertragenden (2) acknowledgment packets (5), the channel parameter or channel quality values ​​of the signal loop.