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

• Current Assignee: National Institute of Information and Communications Technology
• Original Assignee: Communications Research Laboratory Independent Administrative Institution
• Inventors: Fujise, Masayuki, Harada, Hiroshi
• Primary Examiner(s): NGUYEN, DUC M
• Application Number:
  US09/263,214
• Publication Number:
  US 20020111187A1
• Time in Patent Office: 1,691 Days
• Field of Search: 455/552, 455/553, 455/418, 455/419, 455/420, 455/422, 455/433, 455/556, 455/557, 455/560, 455/561, 359/145, 359/136, 359/173, 359/143, 359/179
• US Class Current: 455/552.1
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

In order to utilize several radio communication systems with a radio terminal 1, by preparing the common modulator and demodulator part 2a and reconfigurable modulator and demodulator part 2b in advance and performing function selection means 4 with specified means of differential information 5 which information consists of the list of differential specification information of each radio communication system such as the tap coefficients of filter, frame format and the like, and their hardware address to allocate the information into digital signal processing hardware, the required radio communication systems are realized as users like.

Claims

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.

2. The multi-mode radio transmission system of claim 1, wherein:

said multi-mode mobile radio communication terminal further includes

a storing part configured to store said plurality of pieces of differential information to be supplied to said function selection means in advance, and

an accepting means for accepting an input from a user specifying one of said plurality of pieces of differential information stored in said storing part so as to cause said function selection means to select said one of said plurality of pieces of differential information.

3. The multi-mode radio transmission system of claim 1, wherein:

said multi-mode mobile radio communication terminal works as a television receiver, and

said numerical parameters specify

a number of steps in a fast Fourier transformation,

a guard time for delayed waves,

a synchronizing method for synchronizing data,

a number of steps in an inverse fast Fourier transformation, and

an equalization method for equalizing data.

4. 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 base station configured to communicate with said multi-mode mobile radio communication terminal, wherein

said differential information includes addresses of said reconfigurable circuits to be provided said numerical parameters,

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, and

said differential information is supplied from said base station using a predefined radio communication system, which uses an error-free modulation and demodulation scheme, including a binary phase shift keying scheme.

5. A multi-mode mobile radio communication terminal for communicating using a plurality of radio communication systems, comprising:

a common modulator and demodulator part including

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 receiving unit for receiving said differential information from a base station, said differential information is supplied from a control station to said base station via optical fiber,

and wherein,

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 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.

6. The multi-mode radio communication terminal of claim 5, further comprising:

a storing part configured to store said plurality of pieces differential information to be supplied to said function selection means in advance, and

accepting means for accepting an input from a user specifying one of said plurality of pieces of differential information stored in said storing part so as to cause said function selection means to select said one of said plurality of pieces of differential information.

7. The multi-mode radio communication terminal of claim 5, working as a television receiver, and

said numerical parameters specify

a number of steps in a fast Fourier transformation,

a guard time for delayed waves,

a synchronizing method for synchronizing data,

a number of steps in an inverse fast Fourier transformation, and

an equalization method for equalizing data.

8. A multi-mode radio transmission system for communicating using a plurality of radio communication systems, comprising:

a radio base station configured to communicate with a radio communication terminal, said base station 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 supplying unit for supplying said differential information with said radio communication terminal using a predefined radio communication system, with an error-free modulation and demodulation scheme, including a binary phase shift keying scheme, and wherein,

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 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.

9. The multi-mode radio transmission system of claim 8, wherein:

said base station communicates with a control station; and

said base station is configured to accept an optical signal specifying said differential information sent from said control station via optical fiber, convert said optical signal to an electric signal, and send said electric signal to said mobile terminal using said error-free modulation and demodulation scheme, including a binary phase shift keying scheme.

10. A radio base station using a plurality of radio communication systems to communicate with a radio communication terminal, comprising:

a common modulator and demodulator part including

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 radio communication systems except components related to said common modulator and demodulator part through numerical parameters;

function selection means for 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; and

a supplying unit for supplying said differential information with said radio communication terminal using a predefined radio communication system which uses an error-free modulation and demodulation scheme including a binary phase shift copying scheme, and

wherein

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.

11. The base station of claim 10, wherein:

said base station is configured to communicate with a control station; and

said base station is configured to accept an optical signal specifying said differential information sent from said control station via optical fiber, convert said optical signal to an electric signal and send said electric signal to said mobile terminal using said error-free modulation and demodulation scheme, including a binary phase shift keying scheme.