ABSTRACT
A cable modem is a device that sits on a coaxial cable network and transmits to, and receives from, the network modulated digital data. By coaxial cable network we mean a network that was originally designed for broadcast of analog television signals. In what follows, for clarity we discuss US cable systems only. The user should understand that there are several differences between US and, for example, European cable but the philosophy of cable modem design and most of the problems encountered are essentially the same. As the emphasis of this book is on digital signal processing we also concentrate on the physical layer of the system where the modulation and demodulation occurs.
