Data processing terminal system and transmitting and receiving method using the same

• US 8,489,014 B2
• Filed: 01/18/2012
• Issued: 07/16/2013
• Est. Priority Date: 04/01/2003
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Oga, Toshiyuki
• Primary Examiner(s): NGUYEN, TUAN HOANG
• Application Number:
  US13/353,131
• Publication Number:
  US 20120114027A1
• Time in Patent Office: 545 Days
• Field of Search: 455/1, 455/323, 455/424, 455/500, 455/502, 455/554.2, 455/556.1, 455/557
• US Class Current: 455/1
• 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 1/036 Cooling arrangements
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04L 7/0079 Receiver details

Abstract

An information processing terminal system includes an information processing terminal (6); and a transmitting and receiving unit (5) which is attached to the information processing terminal. The transmitting and receiving unit (5) converts a reception wave signal from a network into a reception analog baseband signal. The transmitting and receiving unit (5) converts the reception analog baseband signal into a reception digital baseband signal in synchronization with a clock. The information processing terminal (6) converts the reception digital baseband signal into a reception data in synchronization with a clock, and a transmission data into a transmission digital baseband signal in synchronization with the clock. The transmitting and receiving unit (5) converts the transmission digital baseband signal into a transmission analog baseband signal in synchronization with the clock. The transmitting and receiving unit (5) converts the transmission analog baseband signal into a transmission modulation wave signal to output to the network.

Claims

1. An information processing terminal system comprising:

an information processing terminal; and

a transmitting and receiving unit which can be attached to or detached from said information processing terminal,

wherein said transmitting and receiving unit comprises;

a transmission and reception processing section;

which is a high frequency processing unit;

a demodulation section;

a modulation section; and

a baseband processing section,

when said transmitting and receiving unit is attached to said information processing terminal, said transmission and reception processing section outputs a reception modulation wave signal from a network to said demodulation section and transmits a transmission modulation wave signal from said modulation section to the network,

said demodulation section converts the reception modulation wave signal from said transmission and reception processing section into a reception analog baseband signal,

said baseband processing section converts the reception analog baseband signal into a reception digital signal to output to said information processing terminal, and converts a transmission digital signal from said information processing terminal into a transmission analog baseband signal,

said modulation section converts the transmission analog baseband signal into the transmission modulation wave signal,

said baseband processing section and said information processing terminal operate in synchronization with a clock, and

the reception digital signal contains a reception data, and the transmission digital signal contains a transmission data.

2. The information processing terminal system according to claim 1, wherein said baseband processing section converts the reception analog baseband signal into a reception digital baseband signal as the reception digital signal to output to said information processing terminal;

and converts a transmission digital baseband signal as the transmission digital signal from said information processing terminal into the transmission analog baseband signal, and

said information processing terminal converts the reception digital baseband signal from said baseband processing section into the reception data and converts the transmission data into the transmission digital baseband signal.

3. The information processing terminal system according to claim 2, wherein said information processing terminal comprises:

an interface; and

a control unit configured to convert the reception digital baseband signal supplied through said interface from said baseband processing section into the reception data and to convert the transmission data into the transmission digital baseband signal to output to said baseband processing section through said interface, and

said demodulation section generates and outputs a reception symbol clock having a frequency to said baseband processing section, said interface and said control unit as a clock.

4. The information processing terminal system according to claim 2, wherein said information processing terminal comprises:

an interface; and

a control unit configured to convert the reception digital baseband signal supplied through said interface from said baseband processing section into the reception data; and

to convert the transmission data into the transmission digital baseband signal to output to said baseband processing section through said interface,

said transmitting and receiving unit further comprises a clock generator,

said transmission and reception processing section generates and outputs a reference signal having a frequency to said clock generator as a clock,

said clock generator recovers a carrier of the reception modulation wave signal based on the reference signal from said transmission and reception processing section to output to said demodulation section; and

generates and outputs a reception symbol clock to said baseband processing section, said interface and said control unit,

said reception symbol clock is synchronous with the reference signal, and

said demodulation section, said baseband processing section, said interface and said control unit operate in synchronization with the reception symbol clock.

5. The information processing terminal system according to claim 2, wherein said information processing terminal comprises:

an interface; and

a control unit configured to convert the reception digital baseband signal supplied through said interface from said baseband processing section into the reception data; and

to convert the transmission data into the transmission digital baseband signal to output to said baseband processing section through said interface,

said transmitting and receiving unit further comprises a clock generator, and

said clock generator generates a clock through self-oscillation to output to said baseband processing section, said interface and said control unit.

6. The information processing terminal system according to claim 2, wherein said information processing terminal comprises:

an interface;

a control unit configured to convert the reception digital baseband signal supplied through said interface from said baseband processing section into the reception data, and to convert the transmission data into the transmission digital baseband signal to output to said baseband processing section through said interface; and

a clock generator, and

said clock generator generates a clock through self-oscillation to output to said baseband processing section, said interface and said control unit.

7. The information processing terminal system according to claim 1, wherein said baseband processing section converts the reception analog baseband signal into the reception data as the reception digital signal to output to said information processing terminal and converts the transmission data as the transmission digital signal from said information processing terminal into the transmission analog baseband signal.

8. The information processing terminal system according to claim 7, wherein said information processing terminal comprises:

an interface; and

a control unit configured to receive the reception data through said interface from said baseband processing section and to output the transmission data to said baseband processing section through said interface, and

said demodulation section generates and outputs a reception symbol clock having a frequency to said baseband processing section, said interface and said control unit as a clock.

9. The information processing terminal system according to claim 7, wherein said information processing terminal comprises:

an interface; and

a control unit configured to receive the reception data through said interface from said baseband processing section, and to output the transmission data to said baseband processing section through said interface,

said transmitting and receiving unit further comprises a clock generator,

said transmission and reception processing section generates and outputs a reference signal having a frequency to said clock generator as a clock,

said clock generator recovers a carrier of the reception modulation wave signal based on the reference signal from said transmission and reception processing section to output to the demodulation section, and generates and outputs a reception symbol clock to said baseband processing section, said interface and said control unit,

said reception symbol clock is synchronous with the reference signal, and

said demodulation section, said baseband processing section, said interface and said control unit operate in synchronization with the reception symbol clock.

10. The information processing terminal system according to claim 7, wherein said information processing terminal comprises:

an interface; and

a control unit configured to receive the reception data through said interface from said baseband processing section, and to output the transmission data to said baseband processing section through said interface,

said transmitting and receiving unit further comprises a clock generator, and

said clock generator generates a clock through self-oscillation to output to said baseband processing section, said interface and said control unit.

11. The information processing terminal system according to claim 7, wherein said information processing terminal comprises:

an interface;

a control unit configured to receive the reception data through said interface from said baseband processing section, and to output the transmission data to said baseband processing section through said interface; and

a clock generator, and

said clock generator generates a clock through self-oscillation to output to said baseband processing section, said interface and said control unit.

12. A transmitting and receiving method in an information processing terminal system in which a transmitting and receiving unit is attached to an information processing terminal, comprising:

(h) in said transmitting and receiving unit, demodulating a reception modulation wave signal from a network to convert into a reception analog baseband signal;

(i) in said transmitting and receiving unit, converting the reception analog baseband signal into a reception digital baseband signal;

(j) in said information processing terminal, converting the reception digital baseband signal into a reception data;

(k) in said information processing terminal, converting a transmission data into a transmission digital baseband signal;

(l) in said transmitting and receiving unit, converting the transmission digital baseband signal into a transmission analog baseband signal;

(m) in said transmitting and receiving unit, converting the transmission analog baseband signal into a transmission modulation wave signal; and

(n) in said transmitting and receiving unit, transmitting the transmission modulation wave signal to the network.

13. A transmitting and receiving unit in an information processing terminal system having an information processing terminal and said transmitting and receiving unit which can be attached to or detached from said information processing terminal, comprising a transmission and reception processing section which is a high-frequency processing unit, a demodulation section, a modulation section and a baseband processing section,

wherein when said transmitting and receiving unit is attached to said information processing terminal, said transmission and reception processing section outputs a reception modulation wave signal from a network to said demodulation section and transmits a transmission modulation wave signal from said modulation section to said network,

said demodulation section converts the reception modulation wave signal from said transmission and reception processing section into a reception analog baseband signal,

said baseband processing section converts the reception analog baseband signal into a reception digital signal to output to said information processing terminal, and converts a transmission digital signal from said information processing terminal into a transmission analog baseband signal,

said modulation section converts the transmission analog baseband signal into the transmission modulation wave signal,

said baseband processing section and said information processing terminal operate in synchronization with a clock, and

said reception digital signal contains a reception data and the transmission digital signal contains a transmission data.

14. The transmitting and receiving unit according to claim 13, wherein said baseband processing section converts the reception analog baseband signal into a reception digital baseband signal as the reception digital signal to output to said information processing terminal, and converts a transmission digital baseband signal as the transmission digital signal from said information processing terminal into the transmission analog baseband signal, and

said information processing terminal converts the reception digital baseband signal from said baseband processing section into the reception data and converts the transmission data into the transmission digital baseband signal.

15. The transmitting and receiving unit according to claim 13, wherein said baseband processing section converts the reception analog baseband signal into the reception data as the reception digital signal to output to said information processing terminal, and converts the transmission data as the transmission digital signal from said information processing terminal into the transmission analog baseband signal.

16. An information processing terminal in an information processing terminal system comprising said information processing terminal and a transmitting and receiving unit which can be attached to or detached from said information processing terminal,

wherein said transmitting and receiving unit comprises a transmission and reception processing section which is a high-frequency processing unit, a demodulation section, a modulation section and a baseband processing section,

when said transmitting and receiving unit is attached to said information processing terminal, said transmission and reception processing section outputs a reception modulation wave signal from a network to said demodulation section and transmits a transmission modulation wave signal from said modulation section to said network,

said demodulation section converts the reception modulation wave signal from said transmission and reception processing section into a reception analog baseband signal,

said baseband processing section converts the reception analog baseband signal into a reception digital signal to output to said information processing terminal and converts a transmission digital signal from said information processing terminal into a transmission analog baseband signal,

said modulation section converts the transmission analog baseband signal into a transmission modulation wave signal,

said baseband processing section and said information processing terminal operate in synchronization with a clock, and

the reception digital signal contains a reception data and the transmission digital signal contains a transmission data.

17. The information processing terminal according to claim 16, wherein said baseband processing section converts the reception analog baseband signal into a reception digital baseband signal as the reception digital signal to output to said information processing terminal, and converts a transmission digital baseband signal as the transmission digital signal from said information processing terminal into the transmission analog baseband signal, and

said information processing terminal converts the reception digital baseband signal from said baseband processing section into the reception data and converts the transmission data into the transmission digital baseband signal.

18. The information processing terminal according to claim 16, wherein said baseband processing section converts the reception analog baseband signal into the reception data as the reception digital signal to output to said information processing terminal, and converts the transmission data as the transmission digital signal from said information processing terminal into the transmission analog baseband signal.

19. A transmitting and receiving unit in an information processing terminal system comprising an information processing terminal and said transmitting and receiving unit which can be attached to or detached from said information processing terminal, wherein said transmitting and receiving unit comprises a transmission and reception processing section which is a high-frequency processing unit, a demodulation section, a modulation section and a baseband processing section,

when said transmitting and receiving unit is attached to said information processing terminal, said transmission and reception processing section outputs a reception modulation wave signal from a network to said demodulation section and transmits a transmission modulation wave signal from said modulation section to said network,

said demodulation section converts the reception modulation wave signal from said transmission and reception processing section into a reception analog baseband signal,

said baseband processing section converts the reception analog baseband signal into a reception digital baseband signal and converts a transmission digital baseband signal from said information processing terminal into a transmission analog baseband signal, and

said modulation section converts the transmission analog baseband signal into the transmission modulation wave signal.

20. An information processing terminal in an information processing terminal system comprising said information processing terminal and a transmitting and receiving unit which can be attached to or detached from said information processing terminal,

wherein said transmitting and receiving unit comprises a transmission and reception processing section which is a high-frequency processing unit, a demodulation section, a modulation section and a baseband processing section,

when said transmitting and receiving unit is attached to said information processing terminal, said transmission and reception processing section outputs a reception modulation wave signal from a network to said demodulation section and transmits a transmission modulation wave signal from said modulation section to said network,

said demodulation section converts the reception modulation wave signal from said transmission and reception processing section into a reception analog baseband signal,

said baseband processing section converts the reception analog baseband signal into a reception digital baseband signal and converts a transmission digital baseband signal from said information processing terminal into a transmission analog baseband signal,

said modulation section converts the transmission analog baseband signal into the transmission modulation wave signal, and

said information processing terminal converts the reception digital baseband signal from said baseband processing section into the reception data and converts a transmission data into the transmission digital baseband signal.