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Multi-mode radio transmission system

  • US 6,636,747 B2
  • Filed: 03/05/1999
  • Issued: 10/21/2003
  • Est. Priority Date: 03/06/1998
  • Status: Expired due to Term
First Claim
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1. A multi-mode radio transmission system for communicating using a plurality of radio communication systems, comprising:

  • a multi-mode mobile radio communication terminal, including a common modulator and demodulator part, having an orthogonal phase modulator, an automatic gain controller, and a quasi-synchronized orthogonal detector, a reconfigurable modulator and demodulator part having reconfigurable circuits allocated on digital signal processing hardware and configured to realize all components related to modulation and demodulation schemes of said plurality of radio communication systems except components related to said common modulator and demodulator part through numerical parameters, and function selection means being supplied with a plurality of pieces of differential information, selecting one piece of information from said plurality of pieces of differential information, and providing said one piece of information to said reconfigurable circuits as said numerical parameters, a control station configured to supply differential information, a base station configured to communicate with said multi-mode mobile radio communication terminal and said control station, and wherein, said differential information is supplied from said control station to said base station via optical fiber, and is supplied from said base station to said multi-mode mobile radio communication terminal, said differential information includes addresses of said reconfigurable circuits to be provided said numerical parameters, and said numerical parameters specify at least one of an encoding method for data transmission, a data transmission speed, a frame format for data transmission, a tap coefficient for a filter, a coefficient to determine a shape of a filter, a coefficient to determine a tap coefficient for use in equalization, a number of steps included in a fast Fourier transformation, a number of steps included in an inverse fast Fourier transformation, a guard time for delayed waves, a synchronization method for synchronizing data, and an equalization method for equalizing data.

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