Emergency location transceivers (ELT)

An emergency location finder transceiver system comprising:

• a receiver for reception of location finder signals;
• a first processor for processing location finder signals;
• a second processor for processing input signals and for providing Orthogonal Frequency Division Multiplex (OFDM) signals;
• a third processor for receiving input signals and for providing spread spectrum signals;
• a fourth processor and selector or combiner for selecting or combining and processing the first processor processed signals with OFDM signals or-with spread spectrum signals or with both OFDM signals and spread spectrum signals;
• a control unit for control and selection of one of the fourth processor processed signals;
• a selector for selecting and providing the fourth processor selected signal to a modulator;
• a signal modulator for modulating the selected signal and for connecting the modulated signal to a signal transmitter for signal transmission;
• and
• an emergency or alarm signal receiver for reception, demodulation and processing of the transmitted signal.

A location finder, communication system comprising:

• a receiver for reception of location finder signals;
• a first processor for processing location finder signals;
• a second processor for processing an input signal and for providing processed Orthogonal Frequency Division Multiplex (OFDM) signals;
• a third processor for processing an input signal and for providing processed cross-correlated shaped in-phase and quadrature-phase signals;
• a fourth signal processor and selector for selecting and processing the first processor processed signals, with processed OFDM signals or with processed cross-correlated signals;
• a modulator for modulating the fourth processor selected processed signals and for providing the modulated signal to a transmitter for signal transmission.

A wireless system comprising:

• a connector for providing from a wire, cable, or fiber optic communication connected internet system a first bit rate signal to a first Orthogonal Frequency Division Multiplex (OFDM) or of Orthogonal Frequency Division Multiple Access (OFDMA) to a first modulator and to a first wireless transmitter for modulating and transmitting said OFDM or OFDMA signal;
• a first receiver and first demodulator for receiving and demodulating the transmitted OFDM or OFDMA signal to demodulated baseband OFDM or OFDMA signal;
• a second receiver and second demodulator for receiving and demodulating location finder modulated transmitted signals to demodulated baseband location finder signal;
• a first baseband processor for receiving and processing a second bit rate signal, wherein the bit rate of said second bit rate signal is different from the bit rate of said first bit rate signal, said first baseband processor comprising a signal generator for generating in-phase and a quadrature-phase signals, said in-phase and a quadrature-phase signals having the property when the in-phase signal has its maximum amplitude, the quadrature signal has zero value and when the in-phase signal has a local maximum the quadrature signal has a local minimum;
• a second baseband processor for processing and combining demodulated baseband location finder signal with said second bit rate processed and generated in-phase and quadrature-phase signals and for providing second processor processed baseband signals to a second modulator and second transmitter for modulating and transmitting said combined baseband signals;
• and
• a second modulator and second transmitter for modulating and transmitting said combined baseband signals.

A transmitter Multiple Input Multiple Output (MIMO) system comprising:

• a first baseband processor for receiving and processing a first signal and for providing processed Orthogonal Frequency Division Multiplexed (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) baseband signal;
• a second baseband processor for receiving and processing a second signal, wherein said second signal is different from said first signal, and for providing a processed spread spectrum baseband signal;
• a third baseband processor for receiving and processing said OFDM or OFDMA processed signal with a third signal containing location finder information or said spread spectrum processed signal with the third signal containing location finder information, wherein said third signal is different from said first and said second signal, and for providing the third baseband processor processed signal to a modulation system for modulation of the third baseband processor processed signal;
• a modulation system comprising one or more modulators for modulation of the third baseband processor processed signal and for providing said modulated signal to a transmitter and antenna system for wireless transmission of the modulation system provided modulated signal;
• a transmitter and antenna system comprising two or more than two signal transmitters for transmission of the modulation system provided modulated signal to two or more than two antennas for wireless signal transmission.