Abstract: A method of estimating the quality of speech information associated with a voice call over a communication system comprising a core network and an access network where speech information is carried between the access network and the core network and within the core network in frames. The method comprises determining a rate of frame loss for frames transported between the access network and the core network and/or within the core network, and mapping the rate of frame loss to a quality estimation value using data collected by simulating frame loss on representative speech samples and determining quality estimation values for the damaged speech samples.

Abstract: A method of estimating the quality of speech information associated with a voice call over a communication system comprising a core network and an access network where speech information is carried between the access network and the core network and within the core network in frames. The method comprises determining a rate of frame loss for frames transported between the access network and the core network and/or within the core network, and mapping the rate of frame loss to a quality estimation value using data collected by simulating frame loss on representative speech samples and determining quality estimation values for the damaged speech samples.

Abstract: A signal combining device and method allows a mobile unit to use a single antenna to receive and transmit information in two or more frequency ranges. The combining device includes a first and second transmitting circuits and a first and second receiving circuits, which are connected to a matching device. The matching device, in turn, is connected to the antenna. The first transmitting circuit and the first receiving circuit are designed to transmit and receive, respectively, a digital signal, and the second transmitting circuit and the second receiving circuit are designed to transmit and receive, respectively, an analogue or a digital signal. By using the signal combining device it is possible to combine signals of different frequency bands, especially digital signals and analogue signals of different frequency bands. As such, the present invention allows for the use of a common antenna in a dual mode radio.