TDD transceiver for utilizing a transmission mode and a reception mode simultaneously, and a self-diagnostic method therefor

• US 20060035601A1
• Filed: 08/12/2005
• Published: 02/16/2006
• Est. Priority Date: 08/12/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Seo, Cheol-Soo
• Application Number:
  US11/202,574
• Publication Number:
  US 20060035601A1
• Time in Patent Office: Days
• US Class Current: 455/78
• CPC Class Codes: H04B 1/40 Circuits

Abstract

A TDD transceiver for utilizing a Tx mode and an Rx mode simultaneously and a self-diagnostic method therefor. In the TDD transceiver, a transmitter transmits a Tx signal from a Tx path to an antenna. A receiver for processes an Rx signal to a baseband signal. A detector couples the Tx signal in the transmitter and provides the coupled Tx signal to the receiver. A diagnostic portion determines if the TDD transceiver is normal or abnormal using the Tx signal received from the receiver.

Claims

1. A time division duplex (TDD) transceiver in a wireless communication system, comprising:

a transmitter for transmitting a transmission (Tx) signal from a Tx path to an antenna;

a receiver for processing a received (Rx) signal to a baseband signal;

a detector for coupling the Tx signal in the transmitter and providing the coupled Tx signal to the receiver; and

a diagnostic portion for determining if the TDD transceiver is normal using the Tx signal received from the receiver.

2. The TDD transceiver of claim 1, wherein the Tx signal from the Tx path is one of an intermediate frequency (IF) signal and a radio frequency (RF) signal.

3. The TDD transceiver of claim 1, wherein the detector comprises:

a directional coupler for coupling the Tx signal;

an attenuator for attenuating the coupled signal to a signal with a power level at which an RX circuit can operate normally; and

a switch for switching the attenuated signal to the Rx circuit.

4. The TDD transceiver of claim 1, wherein the detector is provided between one of an IF processor and an RF processor.

5. The TDD transceiver of claim 1, wherein the diagnostic portion is included in a field programmable gate array (FPGA) of the baseband processor.

6. A time division duplex (TDD) transceiver in a wireless communication system, comprising:

an output portion for transmitting a transmission (Tx) radio frequency (RF) signal to an antenna;

a receiver for processing a received (Rx) signal to a baseband signal;

a detector for detecting the Tx signal in the output portion and providing the detected Tx signal to the receiver; and

a diagnostic portion for determining if the TDD transceiver is normal using the Tx signal received from the receiver.

7. The TDD transceiver of claim 6, wherein the detector comprises:

a directional coupler for coupling the Tx signal;

an attenuator for attenuating the coupled signal to a signal with a power level at which an RX circuit can operate normally; and

a switch for switching the attenuated signal to the Rx circuit.

8. The TDD transceiver of claim 6, wherein the diagnostic portion is included in a field programmable gate array (FPGA) of a baseband processor.

9. A time division duplex (TDD) transceiver in a wireless communication system, comprising:

an output portion for transmitting a transmission (Tx) radio frequency (RF) signal to an antenna;

a receiver for processing a received (Rx) signal to a baseband signal;

a detector for receiving a leakage signal from the output portion and providing the leakage signal to the receiver; and

a diagnostic portion for determining if the TDD transceiver is normal using the leakage signal received from the receiver.

10. The TDD transceiver of claim 9, wherein the detector comprises:

an attenuator for attenuating the leakage signal to a signal with a power level at which an RX circuit can operate normally;

a first switch for providing the leakage signal to an attenuator in a Tx mode; and

a second switch for switching the attenuated signal to the Rx circuit.

11. The TDD transceiver of claim 9, wherein the output portion comprises one of a circulator and a switch.

12. The TDD transceiver of claim 9, wherein the diagnostic portion is included in a field programmable gate array (FPGA) of the baseband processor.

13. A time division duplex (TDD) transceiver in a wireless communication system, comprising:

a transmitter for transmitting a transmission (Tx) signal from a Tx path to an antenna;

a receiver for processing a received (Rx) signal to a baseband signal;

a first detector for detecting an intermediate frequency (IF) signal from the transmitter and providing the detected IF signal to the receiver;

a second detector for detecting a radio frequency (RF) signal from the transmitter and providing the detected RF signal to the receiver; and

a diagnostic portion for determining if the TDD transceiver is normal using one of the IF and the RF signal received from the receiver.

14. The TDD transceiver of claim 13, wherein the first detector comprises:

a directional coupler for coupling the IF signal;

an attenuator for attenuating the coupled IF signal to a signal with a power level at which an RX circuit can operate normally; and

a switch for switching the attenuated IF signal to the Rx circuit.

15. The TDD transceiver of claim 14, wherein the switch switches one of the IF signal detected by the first detector and the RF signal detected by the second detector to the diagnostic portion.

16. The TDD transceiver of claim 13, wherein the second detector comprises:

a directional coupler for coupling the RF signal;

an attenuator for attenuating the coupled RF signal to a signal with a power level at which an RX circuit can operate normally; and

a switch for switching the attenuated RF signal to the Rx circuit.

17. The TDD transceiver of claim 13, wherein the second detector comprises:

an attenuator for attenuating a leakage signal to a signal with a power level at which the RX circuit can operate normally;

a first switch for switching the leakage signal to the attenuator in a Tx mode; and

a second switch for switching the attenuated leakage signal to the Rx circuit.

18. The TDD transceiver of claim 13, wherein the diagnostic portion is included in a field programmable gate array (FPGA) of a baseband processor.

19. A time division duplex (TDD) transceiving method in a wireless communication system, comprising the steps of:

transmitting a transmission (Tx) signal from a Tx path to an antenna;

coupling the Tx signal in the Tx path;

providing the coupled Tx signal to a reception (Rx) path; and

determining if transmission and reception are normal using the Tx signal received from the Rx path.

20. The TDD transceiving method of claim 19, wherein the Tx signal from the Tx path is one of a baseband signal, an intermediate frequency (IF) signal, and a radio frequency (RF) signal.

21. The TDD transceiving method of claim 19, further comprising the step of attenuating the coupled Tx signal to a signal with a power level at which an RX circuit can operate normally.

22. A self-diagnostic method for a time division duplex (TDD) transceiver in a wireless communication system, comprising the steps of:

setting a normal diagnostic mode;

setting a diagnostic path;

selecting one of a plurality of diagnostic threshold look-up tables (LUTs);

selecting a diagnostic signal detected from a user-set point; and

comparing the diagnostic signal with the diagnostic threshold LUT in order to determine if the TDD transceiver operates normally.

23. The self-diagnostic method of claim 22, wherein the plurality of diagnostic threshold LUTs have different values according to diagnostic signal detection points, each LUT having a threshold indicating a threshold power level and a threshold quality level to be compared to the power and quality of a diagnostic signal.

24. A self-diagnostic method for a time division duplex (TDD) transceiver in a wireless communication system, comprising the steps of:

setting a test diagnostic mode;

setting a diagnostic path;

generating a reference signal;

selecting one of a plurality of diagnostic threshold look-up tables (LUTs);

selecting a reference signal detected from a user-set point as a diagnostic signal; and

comparing the diagnostic signal with the diagnostic threshold LUT in order to determine if the TDD transceiver operates normally.

25. The self-diagnostic method of claim 24, wherein the plurality of diagnostic threshold LUTs have different values according to diagnostic signal detection points, each LUT having a threshold indicating a threshold power level and a threshold quality level to be compared to the power and quality of a diagnostic signal.