Dual frequency band transceiver

• US 6,609,010 B1
• Filed: 11/11/1999
• Issued: 08/19/2003
• Est. Priority Date: 11/30/1998
• Status: Expired due to Fees

• Current Assignee: Sony International Europe Gmbh (Sony Group Corp.)
• Original Assignee: Sony International Europe Gmbh (Sony Group Corp.)
• Inventors: Dolle, Thomas, Konschak, Tino, Brankovic, Veselin, Krupezevic, Dragan
• Primary Examiner(s): Chin, Vivian
• Assistant Examiner(s): NGUYEN, DUC M
• Application Number:
  US09/439,411
• Time in Patent Office: 1,377 Days
• Field of Search: 455/552, 455/553, 455/78, 455/84, 455/76, 455/73, 370/206, 370/208, 370/335, 370/465, 370/480, 375/219, 375/260, 375/261
• US Class Current: 455/552.1
• CPC Class Codes: H04B 1/005 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
• CPC Class Codes: H04B 1/0096 where a full band is frequency converted into another full band
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes

Abstract

A dual frequency band transceiver (10) is provided adapted to be operated into different transmission frequency bands. A control unit (8) controls a switching (6) between a first transmission frequency band F_C1 and a second transmission frequency band F_C2, wherein the control unit (8) changes correspondingly and simultaneously to the switching (6) in the first transmission frequency band F_C1 and the second transmission frequency band F_C2 between a first and a second channel bandwidth.

The first and the second channel bandwidth satisfies the following equation:

n*B_C1=m*B_C2,

wherein B_C1 and B_C2 are the first and the second channel bandwidth, respectively, and n and m are an integer values starting with 1.

Claims

1. A dual frequency band transceiver adapted to be operated in two different transmission frequency bands, comprising

a control unit (8) controlling a switch (6) for changing between a first transmission frequency band (f_C1) and a second transmission frequency band (f_C2), wherein the control unit (8) is adapted to change between a first and a second channel bandwidth correspondingly to the switching between the first transmission frequency band (f_C1) and the second transmission frequency band (f_C2) and wherein the first and the second channel bandwidth satisfy the following equation:

2. The dual frequency band transceiver according to claim 1, wherein i>

0.

3. The dual frequency band transceiver according to claim 1, characterized in that

a switch (6) is provided upwardly of the first frequency converting block (3), wherein the switch (6) is controlled by the control unit (8) such that selectively either a signal in the first transmission frequency band (f_c1) or the second transmission frequency band (f_c2) is transmitted/received.

4. The dual frequency band transceiver according to claim 1, furthermore comprising:

a baseband block (1),

at least a first frequency converting block (2, 3), and

at least one antenna (4, 5), wherein

the first frequency converting block (3) is connected between the baseband block (1) and at least one antenna (4, 5) and is adapted to convert an intermediate frequency (IF1, IF2) output of the baseband block (1) or output of another frequency converting block (2), and

a first transmission frequency band (f_c1) of the dual band transceiver corresponds to the intermediate frequency (IF1, IF2) and a second transmission frequency band (f_c2) is obtained as an output signal of the first frequency converting block (2, 3).

5. The dual frequency band transceiver according to claim 4, characterized in that

the control unit (8) is adapted to control the switch (6) together with the bandwidths used according to data link control data.

6. The dual frequency band transceiver according to claim 5, characterized in that

the first transmission frequency band (f_c1) is between 5 and 6 GHz and the second transmission frequency band (f_c2) is 24 GHz, 40 GHz or 60 GHz.

7. The dual frequency band transceiver according to claim 1, characterized in that

the first transmission frequency band (f_c1) is below 10 GHz and the second transmission frequency band (f_c2) is higher than 10 GHz.

8. The dual frequency band transceiver according to claim 1, characterized in that

the baseband block (1) is adapted to operate according to an OFDM modulation technique.

9. The dual frequency band transceiver according to claim 8, characterized in that

the subcarrier spacings of the OFDM system is identical in the first transmission frequency band (f_c1) and the second transmission frequency band (f_c2).

10. The dual frequency band transceiver according to claim 1, characterized in that

different antenna systems (4, 5) are provided to be used respectively when the first or the second transmission frequency band (f_c1, f_c2) is used.

11. The dual frequency band transceiver according to claim 1, characterized in that

the first and the second transmission frequency band (f_c1, f_c2) are selected such that the spectral efficiency of the second transmission frequency band is higher than the spectral efficiency of the first transmission frequency band.

12. A dual band telecommunications device, characterized in that

the device comprises a transceiver according to claim 1.

13. A method for transceiving in two different transmission frequency bands, comprising the following steps:

controlling (8) a switching (6) between a first transmission frequency band (f_c1) and a second transmission frequency band (f_c2), and

changing between a first and a second channel bandwidth correspondingly to the switching between the first transmission frequency band (f_c1) and the second transmission frequency band (f_c2) wherein the first and the second channel bandwidth satisfy the following equation;

n*B_c1=m*B_c2 wherein B_c1 and B_c2 are the first and the second channel bandwidth, respectively, and n and m are integers starting with 1 which satisfy the equation n/m=2ⁱ in which i is a positive or negative integer.

14. The method according to claim 13, characterized by

the step of controlling local oscillator synthesizers to tune to a predetermined channel of the corresponding transmission frequency band.

15. The method according to claim 13, wherein i>

0.

16. The method according to claim 13, characterized in that

the first transmission frequency band (f_c1) is below 10 GHz and the second transmission frequency band (f_c2) is higher than 10 GHz.

17. The method according to claim 16, characterized in that

the first transmission frequency band (f_c1) is between 5 and 6 GHz and the second transmission frequency band (f_c2) is in a range of 24 GHz, 40 GHz or 60 GHz.

18. The method according to claim 13, characterized in that

the transceiving is effected according to an OFDM modulation technique.

19. The method according to claim 18, characterized in that

the subcarrier spacings of the OFDM system are identical in the first transmission frequency band (f_c1) and the second transmission frequency band (f_c2).