1. A communication system comprising: a headend system producing a signal containing multiplexed channels, each channel carrying a transport stream comprising multiplexed streams of digitized broadband information; a plurality of broadband wireless transmitters for broadcasting the signal into a service area said transmitters being located at spaced apart sites for transmitting said signal containing multiplexed channels so that areas of propagation from respective ones of the transmitters substantially overlap over each other in at least a major portion of the service area; a two-way wireless packet data network and; a plurality of receiver systems within the service area, each receiver system comprising: (i) an antenna for receiving a wireless transmission of the signal; (ii) an interface module processing the received signal to select one of the channels and acquire a transport stream from the selected channel, (iii) a digital signal processing section for processing digitized data from a selected stream of digitized broadband information contained in the acquired transport stream to present selected broadband information, and (iv) an RF modem for two-way communication of signaling messages to and from the receiver system via the wireless packet data network.