Communication terminal with bandwidth widening expansion and echo compensation

A communication terminal, comprising:

• a signal reception path which includes a bandwidth widening device for artificially widening a bandwidth of a received signal in the communication terminal, a digital/analog converter and a loudspeaker;
• and
• a signal transmission path which includes a microphone, a transmission path low-pass filter and an analog/digital converter;
• wherein an echo compensation device is provided between one output of the bandwidth widening device and a connecting point of the signal transmission path, beyond the analog/digital converter with respect to the microphone.

A method for artificially widening a bandwidth of a received signal in a communication terminal having a signal reception path and a signal transmission path, the method comprising:

• sampling the received signal in the signal reception path;
• widening the bandwidth of the received signal via a bandwidth widening algorithm based on sample values obtained in the step of sampling so as to obtain a widened received signal;
• and
• compensating for an echo on the widened received signal for the signal transmission path via an echo compensation algorithm, with the widened received signal being sampled.