Methods and systems for mobile to mobile direct communication between mobile devices, automobiles, vehicles and subscribers of cellular systems and other users of digital wireless networks. Broadcasting, teleinformatics and telemetry methods and systems. Mobile devices receive and process signal for navigation and location finding. Data signals are processed into cross-correlated Time Constrained Signal (TCS) wave form and Long Response (LR) filtered signals and transmitted. Touchscreen, sensor and fingerprint generated signals are processed for control and authentication of the mobile devices. Software Defined Radio (SDR) of Bit Rate Agile (BRA) or Bit Rate Adaptive (BRA), Modulation Format Selectable (MFS) and radio frequency agile (RFA) system implementations.