AUTOMATIC GAIN CONTROL SYSTEM FOR A MULTI-USER OFDM DIGITAL TRANSMISSION SYSTEM USING THE ELECTRIC GRID

摘要

The invention relates to a system comprising numerous pieces of user equipment and a piece of headend equipment which are in bi-directional communication by means of the electric grid. The inventive system is essentially characterised in that it comprises: carrier-to-carrier processing on the transmitter signals and the receiver signals and control over the transmitting power of the different pieces of equipment. Said system can be used to: reach a maximum number of users, achieve a maximum transmitting power, admit signals coming from very close and very distant users, prevent the occurrence of overflows, introduce the maximum average power over the available communication range and minimise the number of bits necessary for the analogue/digital conversion upon reception.