Patent ID: 8311140

Claim:
A communication and position finding method comprising steps of: processing a received signal for generating from said received signal a processed position finder signal for providing said processed position finder to an interface processor of a mobile device for use by a user of said mobile device; generating in said mobile device an infrared (IR) signal and transmitting said IR signal; processing in said mobile device a first data signal into a cross-correlated in-phase and quadrature-phase baseband signal; processing in said mobile device a second data signal into a orthogonal frequency division multiplex (OFDM) baseband signal; connecting said cross-correlated baseband signal to a first modulator for modulating said cross-correlated baseband signal into a first modulated signal; connecting said OFDM baseband signal to a second modulator for modulating said OFDM baseband signal into a second modulated signal; and connecting said first and said second modulated signal to a transmitter for transmission of said first or said second modulated signal.