Wireless communication apparatus and method,and computer program

• US 20050276319A1
• Filed: 05/31/2005
• Published: 12/15/2005
• Est. Priority Date: 06/11/2004
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Tanaka, Katsuyuki, Takada, Masayuki, Akiyama, Keiji
• Granted Patent: US 7,532,665 B2
• Time in Patent Office: Days
• US Class Current: 375/220
• CPC Class Codes: H04B 1/40 Circuits

Abstract

The present invention provides a wireless communication apparatus for transmission/reception of a wireless communication signal, which includes: first and second circuits for processing a transmission/reception signal; an oscillator for generating a reception clock on a first circuit side, the reception clock being used for an operation reference; a first interface for supplying the reception clock from the first circuit to the second circuit; a second interface for inputting, to the first circuit, transmission data output from the second circuit synchronously with the reception clock supplied from the first circuit; and delay compensating means for compensating for a delay between the reception clock and transmission data at the first circuit, the reception clock and transmission data being input via the second interface.

Claims

1. A wireless communication apparatus for transmission/reception of a wireless communication signal, comprising:

first and second circuits for processing a transmission/reception signal;

an oscillator for generating a reception clock on a first circuit side, the reception clock being used for an operation reference;

a first interface for supplying the reception clock from said first circuit to said second circuit;

a second interface for inputting, to said first circuit, transmission data output from said second circuit synchronously with the reception clock supplied from said first circuit; and

delay compensating means for compensating for a delay between the reception clock and transmission data at said first circuit, the reception clock and transmission data being input via said second interface.

2. The wireless communication apparatus as claimed in claim 1, wherein:

said first circuit is a wireless circuit module for performing a transmission/reception process of a wireless communication signal, and

said second circuit is a physical layer module for processing transmission data in a physical layer protocol.

3. The wireless communication apparatus as claimed in claim 1, wherein:

said delay compensating means inserts a proper delay amount into the transmission data and maintains a delay of the transmission data to be always constant.

4. The wireless communication apparatus as claimed in claim 1, provided with a data transmission mode for executing a data transmission process and a calibration mode for compensating for a delay time of transmission data.

5. The wireless communication apparatus as claimed in claim 4, wherein:

in said calibration mode, said delay compensating means sends a calibration pulse having a duration over an anticipated maximum delay time from said first circuit to said second circuit via said first interface, and compensates for a delay time on the basis of a delay between a pulse looped-back from said second circuit to said first circuit via said second interface and the original calibration pulse.

6. The wireless communication apparatus as claimed in claim 5, wherein:

in accordance with a phase difference between the pulse looped-back from said second circuit to said first circuit via said second interface and the original calibration pulse, said delay compensating means compensates for a delay time less than one clock period and inserts a proper delay amount into transmission data to make the transmission data have the maximum delay time.

7. A wireless communication method of transmitting/receiving a wireless signal, comprising:

a step of generating a reception clock to be an operation reference in a first circuit processing a transmission/reception signal on a side of the first circuit;

a step of supplying the reception clock from said first circuit to a second circuit;

a step of inputting into said first circuit transmission data synchronized with the reception clock supplied from said first circuit to be outputted from said second circuit;

a delay compensating step of compensating in said first circuit for a delay between the transmission data inputted from said second circuit and the reception clock.

8. The wireless communication method as claimed in claim 7, wherein:

said first circuit is a wireless circuit module for performing a transmission/reception process of a wireless communication signal, and

said second circuit is a physical layer module for processing transmission data in a physical layer protocol.

9. The wireless communication method as claimed in claim 7, wherein:

in said delay compensating step, a proper delay amount is inserted into the transmission data so as to maintain a delay of the transmission data to be always constant.

10. The wireless communication method as claimed in claim 7, provided with a data transmission mode for executing a data transmission process and a calibration mode for compensating for a delay time of transmission data.

11. The wireless communication method as claimed in claim 10, wherein:

in said calibration mode, in said delay compensating step a calibration pulse having a duration over an anticipated maximum delay time is sent from said first circuit to said second circuit via said first interface, and a delay time is compensated on the basis of a delay between a pulse looped-back from said second circuit to said first circuit via said second interface and the original calibration pulse.

12. The wireless communication method as claimed in claim 7, wherein:

in said delay compensating step, a delay time in one clock period in accordance with a phase difference between the pulse looped-back from said second circuit to said first circuit via said second interface and the original calibration pulse and a proper delay amount is inserted into transmission data to make the transmission data have the maximum delay time.

13. A computer program written in a computer readable format so as to make a computer system execute a process for allowing a wireless communication apparatus to perform delay time compensated data transmission, the wireless communication apparatus comprising first and second circuits for processing a transmission/reception signal, an oscillator for generating a reception clock on a first circuit side, the reception clock being used for an operation basis, a first interface for supplying the reception clock from said first circuit to said second circuit, and a second interface for inputting, to said first circuit, transmission data output from said second circuit synchronously with the reception clock supplied from said first circuit, said computer program comprising the steps of:

sending a calibration pulse having a duration over an anticipated maximum delay time from said first circuit to said second circuit via said first interface;

compensating for a delay time in one clock period in accordance with a phase difference between a pulse looped-back from said second circuit to said first circuit via said second interface and the original calibration pulse; and

inserting a proper delay amount into transmission data to make the transmission data have the maximum delay time.