The present invention provides for a modulation control device and method that
can be implemented economically in existing communication networks or new networks
to increase capacity. A modulation control device in accordance with the present
invention allows for possibly more than one call to simultaneously utilize the
same frequency channel for AMPS systems or the same frequency during the same timeslot
for TDMA systems. A modulation control device in accordance with the present invention
evaluates the transmission quality of a frequency channel and if acceptable, the
modulation control device phase divides the frequency channel. The modulation control
device assigns phase adjustment values to a call preferably which remain independent
of the information encoding modulation techniques utilized. A call then can be
modulated by the assigned phase adjustment value during transmission, and the call
may be identified by the assigned phase adjustment value during reception. The
present invention further provides a methodology for modulating calls by varying
phase to increase capacity in wireless communication networks.