Multi-mode cellular phone terminal

• US 20010055980A1
• Filed: 06/05/2001
• Published: 12/27/2001
• Est. Priority Date: 06/06/2000
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Sato, Yukio
• Granted Patent: US 7,035,596 B2
• Time in Patent Office: Days
• US Class Current: 455/552.1
• CPC Class Codes: H03J 1/0008 using a central processing unit, e.g. a microprocessor digital tuning in general H03J5/0245
• CPC Class Codes: H03J 7/04 where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
• CPC Class Codes: H04B 1/0003 Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain digital baseband systems H04L25/00; digital modulation/demodulation H04L27/00; CDMA H04B1/707; TDMA H04B7/2643; image transmission H04N5/00
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04M 1/725 Cordless telephones user interfaces specially adapted therefor H04M1/724

Abstract

In such a multi-mode cellular phone terminal, a transmitter, a receiver and a synthesizer are composed of common hardware that can be used in a plurality of communications systems. A channel CODEC, a modulator, an equalizer and memory for signal processing programs are composed of common hardware to execute signal processing supporting a plurality of communications systems. A CPU and memory for a communications control program supports different communications control systems. Thus, it is provided a multi-mode cellular phone terminal that supports different communications systems with compact design and low cost.

Claims

1. A multi-mode cellular phone terminal comprising:

radio communications means connected to an antenna for transmitting/receiving radio waves;

signal processing means for transmitting/receiving a transmit/receive signal to/from said radio communications means; and

communications control means for controlling said radio communications means and said signal processing means, said multi-mode cellular phone terminal supporting a plurality of communications systems,

wherein said radio communications means is composed of hardware to be used in common by a plurality of communications systems, and said signal processing means is composed of hardware to execute signal processing supporting a plurality of communications systems.

2. A multi-mode cellular phone terminal according to

claim 1

, wherein said signal processing means can support a plurality of different bit rates and modulation systems by using the same communications control system.

3. A multi-mode cellular phone terminal according to

claim 1

, wherein communications control means can support different communications control systems and that said signal processing means can support different bit rates and modulation systems.

4. A multi-mode cellular phone terminal according to

claim 2

, wherein said clock having a frequency necessary for modulation/demodulation at a plurality of different bit rates is generated by frequency division means for making integral frequency division via different dividing number or fractional frequency division of a common reference clock output from a single oscillator.

5. A multi-mode cellular phone terminal according to

claim 3

, wherein said clock having a frequency necessary for modulation/demodulation at a plurality of different bit rates is generated by frequency division means for making integral frequency division via different dividing number or fractional frequency division of a common reference clock output from a single oscillator.

6. A multi-mode cellular phone terminal according to

claim 2

, wherein said signal processing means executes modulation/demodulation supporting a plurality of communications systems and has a signal processor composed of common hardware and memory storing a plurality of signal processing programs.

7. A multi-mode cellular phone terminal according to

claim 3

, wherein said signal processing means executes modulation/demodulation supporting a plurality of communications systems and has a signal processor composed of common hardware and memory storing a plurality of signal processing programs.

8. A multi-mode cellular phone terminal according to

claim 2

, wherein said signal processing means has a signal processor composed of common hardware and read/write memory storing the minimum signal processing programs to support each communications system.

9. A multi-mode cellular phone terminal according to

claim 3

, wherein said signal processing means has a signal processor composed of common hardware and read/write memory storing the minimum signal processing programs to support each communications system.

10. A multi-mode cellular phone terminal according to

claim 3

, wherein said communications control means has a controller supporting a plurality of communications systems and memory storing control programs supporting the multi-mode.

11. A multi-mode cellular phone terminal according to

claim 4

, wherein said multi-mode cellular phone terminal has a system timer for switching over a plurality of clocks generated by said frequency division means and counting different timings to support a plurality of communications systems.

12. A multi-mode cellular phone terminal according to

claim 5

, wherein said multi-mode cellular phone terminal has a system timer for switching over a plurality of clocks generated by said frequency division means and counting different timings to support a plurality of communications systems.

13. A multi-mode cellular phone terminal according to

claim 10

, wherein said multi-mode cellular phone terminal establishes connection of a voice call or data communications by switching over and counting a plurality of timings to support a plurality of communications systems and maintaining the system timing synchronization supporting a plurality of communications systems.

14. A multi-mode cellular phone terminal according to

claim 11

, wherein said multi-mode cellular phone terminal establishes connection of a voice call or data communications by switching over and counting a plurality of timings to support a plurality of communications systems and maintaining the system timing synchronization supporting a plurality of communications systems.

15. A multi-mode cellular phone terminal according to

claim 12

, wherein said multi-mode cellular phone terminal establishes connection of a voice call or data communications by switching over and counting a plurality of timings to support a plurality of communications systems and maintaining the system timing synchronization supporting a plurality of communications systems.

16. A multi-mode cellular phone terminal according to

claim 13

, characterized in that said multi-mode cellular phone terminal performs a handover between different communications systems by providing monitoring means for monitoring the receiving state to support the communications system of the handover destination in the idle period of an established communications system in connecting a voice call or data communications and by maintaining the system timing synchronization to support the communications system of the handover destination.

17. A multi-mode cellular phone terminal according to

claim 14

, characterized in that said multi-mode cellular phone terminal performs a handover between different communications systems by providing monitoring means for monitoring the receiving state to support the communications system of the handover destination in the idle period of an established communications system in connecting a voice call or data communications and by maintaining the system timing synchronization to support the communications system of the handover destination.

18. A multi-mode cellular phone terminal according to

claim 15

, characterized in that said multi-mode cellular phone terminal performs a handover between different communications systems by providing monitoring means for monitoring the receiving state to support the communications system of the handover destination in the idle period of an established communications system in connecting a voice call or data communications and by maintaining the system timing synchronization to support the communications system of the handover destination.