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Base station devices and automobile wireless communication systems

  • US 9,373,251 B2
  • Filed: 12/05/2015
  • Issued: 06/21/2016
  • Est. Priority Date: 08/09/1999
  • Status: Active Grant
First Claim
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1. A method comprising the steps of:

  • receiving and demodulating one or more Global Positioning System (GPS) modulated signals into a location finding baseband signal and for providing said location finding baseband signal to an interface unit of a mobile Base Station Transceiver Subsystem (BTS) device for location finding, which location finding baseband signal provides location information of the mobile device;

    receiving and demodulating in said BTS a spread spectrum video modulated signal into a spread spectrum video baseband signal, converting said spread spectrum video baseband signal into an Orthogonal Frequency Division Multiplexed (OFDM) video baseband signal;

    modulating said OFDM video baseband signal in a modulator into an OFDM video modulated signal and transmitting in said BTS said OFDM video modulated signal;

    receiving and demodulating in said BTS an OFDM voice modulated signal into an OFDM voice baseband signal, said OFDM voice baseband signal is converted into a spread spectrum voice baseband signal;

    modulating said spread spectrum voice baseband signal into a modulated spread spectrum voice signal;

    transmitting said modulated spread spectrum voice signal;

    processing in said BTS device a photo camera signal into a Code Division Multiple Access (CDMA) baseband signal;

    incorporating location information from said location finding baseband signal into said CDMA baseband signal, to provide a location based CDMA baseband signal;

    said location based CDMA digital spread spectrum baseband signal comprises in-phase and quadrature phase cross-correlated Time Constrained (TCS) waveforms and cascaded Long Response (LR) filter filtered baseband signals; and

    modulating said location based CDMA digital spread spectrum cross-correlated baseband signal in a modulator into a modulated CDMA digital spread spectrum signal and transmitting in said BTS said modulated CDMA digital spread spectrum signal;

    further comprising in said BTS device a method for modulation of a first Gaussian Minimum Shift Keying (OMSK) transmit filter filtered baseband signal into a first transmit filter filtered modulated GMSK signal, said first transmit filter filtered modulated GMSK signal comprises cross-correlated in-phase and quadrature phase Time Constrained (TCS) waveforms and cascaded Long Response (LR) filter filtered signals, and demodulating a second GMSK modulated signal into a second GMSK receive filter filtered baseband signal, said receive filter is mis-matched to said transmit filter.

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