METHOD, APPARATUS, AND SYSTEM FOR MICROWAVE SIGNAL CORRECTION

• US 20110110472A1
• Filed: 01/05/2011
• Published: 05/12/2011
• Est. Priority Date: 11/09/2009
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: ZHAO, Guixue
• Granted Patent: US 8,824,589 B2
• Time in Patent Office: Days
• US Class Current: 375/346
• CPC Class Codes: H04L 25/03019 adaptive, i.e. capable of adjustment during data reception
• CPC Class Codes: H04L 27/2064 using microwave technology
• CPC Class Codes: H04L 27/223 Demodulation in the optical domain optical demodulation H04B10/676
• CPC Class Codes: H04L 27/367 using predistortion
• CPC Class Codes: H04L 27/3854 using a non - coherent carrier, including systems with baseband correction for phase or frequency offset

Abstract

A method, an apparatus, and a system are provided in various embodiments of the present invention. According to embodiments of the present invention, the receiver samples the frequency signal from the transmitter to obtain sampling data and obtain the feedback IQ signal from the sampling data, and performs signal correction by using the feedback IQ signal. Sampling the received radio frequency signal does not need an additional component. The receiving channel installed in the receiver can be used to receive the radio frequency signal, which reduces the cost and power consumption.

Claims

1. A method for microwave signal correction, comprising:

receiving a first radio frequency (RF) signal from a transmitter, a microwave frame of the first RF signal carrying an original IQ signal;

sampling the first RF signal to obtain sampling data, and obtaining a feedback IQ signal from the sampling data;

demodulating the sampling data to restore the microwave frame and obtain the original IQ signal;

obtaining an error signal through error calculation using the original IQ signal and the feedback IQ signal; and

performing signal correction by using the error signal.

2. The method according to claim 1, wherein the performing of the signal correction by using the error signal comprises:

correcting the received RF signal by using the error signal.

3. The method according to claim 1, wherein the performing of the signal correction by using the error signal further comprises:

transmitting a second RF signal to the transmitter, wherein a microwave frame of the second RF signal carries the error signal and the transmitter corrects the transmitted RF signal by using the error signal.

4. A method for microwave signal correction, comprising:

receiving a first radio frequency (RF) signal from a transmitter;

sampling the first RF signal to obtain sampling data, and obtaining a feedback IQ signal from the sampling data; and

transmitting a second RF signal to the transmitter, wherein the second RF signal carries the feedback IQ signal and the transmitter corrects the transmitted RF signal by using the feedback IQ signal.

5. The method according to claim 4, wherein the correcting of the transmitted RF signal by the transmitter by using the feedback IQ signal comprises:

obtaining, by the transmitter, an error signal through error calculation using an original IQ signal and the feedback IQ signal; and

correcting, by the transmitter, the transmitted RF signal by using the error signal.

6. A method for microwave signal correction, comprising:

receiving a first radio frequency (RF) signal from a transmitter;

sampling the first RF signal to obtain sampling data, and obtaining a feedback IQ signal from the sampling data;

obtaining an error signal through error calculation using the feedback IQ signal; and

transmitting a second RF signal to the transmitter, wherein the second RF signal carries the error signal and the transmitter corrects the transmitted RF signal by using the error signal.

7. An apparatus for microwave signal correction, comprising:

a receiving unit, configured to receive a first radio frequency (RF) signal from a transmitter, a microwave frame of the first RF signal carrying an original IQ signal;

an obtaining unit, configured to sample the first RF signal to obtain sampling data and obtain a feedback IQ signal from the sampling data; and

further configured to demodulate the sampling data to restore the microwave frame and obtain the original IQ signal;

an error calculation unit, configured to obtain an error signal through error calculation using the original IQ signal and the feedback IQ signal; and

an correcting unit, configured to perform signal correction by using the error signal.

8. The apparatus according to claim 7, wherein the correcting unit is specifically configured to correct the received RF signal by using the error signal.

9. The method according to claim 7, wherein the correcting unit is specifically configured to transmit a second RF signal to the transmitter, wherein a microwave frame of the second RF signal carries the error signal and the transmitter corrects the transmitted radio frequency signal by using the error signal.

10. An apparatus for microwave signal correction, comprising:

a receiving unit, configured to receive a first radio frequency (RF) signal from a transmitter;

an obtaining unit, configured to sample the first RF signal to obtain sampling data, and obtain a feedback IQ signal from the sampling data; and

a transmitting unit, configured to transmit a second RF signal to the transmitter, wherein the second RF signal carries the feedback IQ signal and the transmitter corrects the transmitted RF signal by using the feedback IQ signal.

11. An apparatus for microwave signal correction, comprising:

a receiving unit, configured to receive a first radio frequency (RF) signal from a transmitter;

an obtaining unit, configured to sample the first RF signal to obtain sampling data, and obtain a feedback IQ signal from the sampling data;

an error calculation unit, configured to obtain an error signal through error calculation using the feedback IQ signal; and

a transmitting unit, configured to transmit a second RF signal to the transmitter, wherein the second RF signal carries the error signal and the transmitter corrects the transmitted RF signal by using the error signal.

12. A system for microwave signal correction, comprising:

a transmitter, configured to transmit a first radio frequency (RF) signal to a receiver, a microwave frame of the first RF carrying an original IQ signal; and

the receiver, configured to receive the first RF signal;

sample the first RF signal to obtain the sampling data and obtain a feedback IQ signal from the sampling data;

demodulate the sampling data to restore the microwave frame and obtain the original IQ signal;

obtain an error signal through error calculation using the original IQ signal and the feedback IQ signal; and

perform signal correction by using the error signal.

13. A system for microwave signal correction, comprising:

a transmitter, configured to transmit a first radio frequency (RF) signal to a receiver; and

the receiver, configured to receive the first RF signal;

sample the first RF signal to obtain sampling data and obtain a feedback IQ signal from the sampling data; and

transmit a second RF signal to the transmitter, the second RF signal carrying the feedback IQ signal;

wherein the transmitter is further configured to receive the second RF signal and perform signal correction by using the feedback IQ signal.

14. A system for microwave signal correction, comprising:

a transmitter, configured to transmit a first radio frequency (RF) signal to a receiver; and

the receiver, configured to receive the first RF signal;

sample the RF signal to obtain sampling data and obtain a feedback IQ signal from the sampling data;

obtain an error signal through error calculation using the feedback IQ signal; and

transmit a second RF signal to the transmitter, the second RF signal carrying the error signal;

wherein the transmitter is further configured to receive the second RF signal and correct the transmitted RF signal by using the error signal.