ABSTRACT
A single-frequency network (SFN) consists of several transmitters, operating on a single channel, covering a service area to deliver a unitary program service or a complement of such services. Digital On-Channel Repeaters of a particular design (DOCRs) provide the simplest method for establishing an SFN. Distributed Translators are a hybrid of DOCRs, distributed transmitters, and translators. The small-cell method is implemented using lower-power transmitters that cover smaller areas and are in closer proximity to one another than in the large-cell method. SFNs enable service to be provided in places that cannot be reached using single, high-power transmitters alone. Designing SFNs in the modern spectrum environment would not be possible without software design tools running on reasonably fast computers. To enable receivers to treat the signals from multiple SFN transmitters as echoes of one another, those signals must have the characteristics of echoes when they arrive at receiver inputs.
