Transmission modulation system for mobile phone reduces battery consumption without increasing bit error rate

The transmission modulation system minimizes the wasted 'out of band' power. The digital data (1) to be transmitted is fed via a pulse response filter (2) to a mixer (4) where it modulates a carrier wave (4). The digital data is also fed via a delay circuit (5) and identical filter (6) to a second mixer (7). The delayed signal modulates a...

Modulation system for radio communications transmission

Abstract of NL 1007132 (C1) The null points of the filter transfer function (h(t)) are identical to the null points of the base frequency of the modulation signal