Radio Frequency Identification (RFID), location finder, multiple transmitter, multiple receiver and multimode communication systems including combination and or selection of one or more of Time Division Multiplexed (TDM) or Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiplex (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA), spread spectrum, and cross-correlated in-phase and quadrature-phase baseband modulated signals used in Bit rate Agile (BRA) systems and mesh networks. Interoperable systems including 2G, 3G, 4G internet systems and Wi-Fi, Wi-Max, OFDM, CDMA, TDMA, GSM systems.