... well-chosen fre-quency so that it can be considered a bandlimited signal. It is this signal thatis sampled and converted to a discrete-time signal and coded to a digital signal by the analog -to- digital ... ability to compress the data bya significant factor and receive the input signal at lower cost and very goodquality. To point out the power of digital signal processing theory and the digital signal ... convolution, automatic frequency-, power- and gain-control” [3], and all of them done in a triband phone with TDMA, CDMA, and analog signal processing! The mobile phone is just an example to illus-trate...