Method and apparatus for transmitting/receiving signals in a microwave system

• US 8,385,745 B2
• Filed: 11/25/2009
• Issued: 02/26/2013
• Est. Priority Date: 12/17/2008
• 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
• Primary Examiner(s): Washburn, Daniel
• Assistant Examiner(s): WOLDEKIDAN, HIBRET ASNAKE
• Application Number:
  US12/625,878
• Publication Number:
  US 20100150565A1
• Time in Patent Office: 1,189 Days
• Field of Search: 398/115, 398/135, 398/138, 398/139, 398/5, 398/2, 398/1
• US Class Current: 398/115
• CPC Class Codes: H04B 10/032 using working and protection systems H04J14/0287 takes precedence
• CPC Class Codes: H04B 10/25759 Details of the reception of RF signal or the optical conversion before the optical fibre

Abstract

This invention discloses a method and an apparatus for transmitting/receiving signals in a microwave system, and pertains to the field of communications. The transmitting method comprises receiving and modulating a transmission signal transmitted via an optical fiber; processing the modulated transmission signal to generate RF signal; and separating the RF signal to be transmitted from a signal received via an antenna, and transmitting the separated RF signal via the antenna. The receiving method comprises separating a signal received via an antenna from a signal to be transmitted; processing the received signal after being separated to generate IF signal; demodulating the generated IF signal; and transmitting the received signal after being demodulated via an optical fiber. The transmitting/receiving apparatus comprises an optical fiber signal interface, a signal reception module, a modulation module, an IF-RF transmission module, a duplexer, a control module and a power interface. Use of the optical fiber to transmit the transmission signal and the received signal according to the present invention makes it possible for application of large capacity microwave and also greatly saves production cost.

Claims

1. A method for transmitting/receiving a signal in a microwave system, when a signal is transmitted and there is a failure in a primary transmission apparatus in the microwave system, the method comprising:

receiving a first transmission signal transferred via an optical fiber;

dividing the first transmission signal into a first branch and a second branch;

taking the first branch of the transmission signal as a backup signal;

selecting for modulation, a second transmission signal from the group consisting of;

(a) the second branch of the first transmission signal, and (b) a third transmission signal sent from a traffic protection bus;

modulating the selected second transmission signal;

processing the modulated second transmission signal to generate an RF signal; and

separating the RF signal to be transmitted from a first signal received via an antenna, and transmitting the separated RF signal via the antenna;

and wherein, when a second signal is received via the antenna, the method further comprises;

separating the second signal received via the antenna from an RF signal to be transmitted;

processing the separated signal to generate an Intermediate Frequency (IF) signal;

demodulating the generated IF signal; and

transmitting the demodulated IF signal via the optical fiber, the step of transmitting comprising;

dividing the demodulated IF signal into a third branch and a fourth branch;

taking the third branch of the demodulated IF signal as a backup signal;

selecting for process, a fourth transmission signal from the group consisting of;

(a) the fourth branch of the demodulated IF signal, and (b) a fifth transmission signal sent from the traffic protection bus; and

transmitting the fourth transmission signal, after being processed, via the optical fiber.

2. An apparatus for transmitting/receiving a signal in a microwave system, comprising an optical fiber signal interface, a signal reception module, a modulation module, an IF-RF transmission module, a duplexer, a control module and a power interface, wherein

the signal reception module is adapted to receive a transmission signal sent from another apparatus via the optical fiber signal interface, and send a corresponding signal to the modulation module;

the modulation module is adapted to modulate the corresponding signal sent from the signal reception module;

the IF-RF transmission module is adapted to process the corresponding signal having been modulated by the modulation module to generate an RF signal;

the duplexer is adapted to separate the RF signal to be transmitted from a signal received via an antenna, and transmit the separated RF signal to the antenna;

the control module is adapted to configure and manage the signal reception module, the modulation module and the IF-RF transmission module in the apparatus; and

the power interface is adapted to enable another apparatus to supply power to the apparatus, and

wherein the signal reception module is adapted to receive the transmission signal via the optical fiber signal interface, divide the received signal into two branches, take one branch of the received signal as a backup signal, and select any one transmission signal from the other branch of the received signal and a transmission signal sent via a traffic protection bus interface connected to the apparatus for transmission to the modulation module.

3. The apparatus for transmitting/receiving a signal in a microwave system according to claim 2, wherein the duplexer is adapted to separate a signal received via the antenna from an RF signal to be transmitted,

wherein the apparatus is further adapted to comprise an IF-RF reception module adapted to process the received signal separated by the duplexer to generate an IF signal and a demodulation module adapted to demodulate the generated IF signal;

wherein the signal reception module is further adapted to transmit the signal demodulated by the demodulation module to other apparatuses via the optical fiber signal interface,

and wherein the control module is further adapted to configure and manage the IF-RF reception module and the demodulation module in the apparatus.

4. The apparatus for transmitting/receiving a signal in a microwave system according to claim 3, wherein the signal reception module is adapted to divide the demodulated received signal sent from the demodulation module into two branches, take one branch of the received signal as a backup signal, select any one from the other branch of the received signal and a demodulated received signal sent from the traffic protection bus interface to process, and transmit the received signal after being processed via the optical fiber signal interface.

5. A transceiving system for transmitting/receiving a signal in a microwave system, comprising a first and second transmitting/receiving apparatus and a traffic protection bus interface connecting the first and second transmitting/receiving apparatus to each other,

wherein, each of the first and second transmitting/receiving apparatus is adapted to divide a transmission signal received from an external apparatus into two branches, send one branch of the received transmission signal to the other one of the first and second transmitting/receiving apparatus and receive a signal sent from the other one of the first and second transmitting/receiving apparatus via the traffic protection bus interface, and select any one of the other branch of the received signal and the signal sent from the other one of the first and second transmitting/receiving apparatus via the traffic protection bus interface to be processed and transmitted;

wherein each of the first and second transmitting/receiving apparatus comprises an optical fiber signal interface, a signal reception module, a modulation module, an IF-RF transmission module, a duplexer, and a control module, and

wherein the signal reception module is adapted to receive the transmission signal from the external apparatus via the optical fiber signal interface, divide the received signal into two branches, send one branch of the received signal to the other one of the first and second transmitting/receiving apparatus and receive a signal sent from the other one of the first and second transmitting/receiving apparatus via the traffic protection bus interface, and select any one of the other branch of the received signal and the signal sent from the other one of the first and second transmitting/receiving apparatus via the traffic protection bus interface, and send the selected signal to the modulation module;

the modulation module is adapted to modulate the signal sent from the signal reception module;

the IF-RF transmission module is adapted to process the signal having been modulated by the modulation module to generate an RF signal;

the duplexer is adapted to separate the RF signal to be transmitted from a signal received via an antenna, and transmit the separated RF signal to the antenna; and

the control module is adapted to configure and manage the signal reception module, the modulation module and the IF-RF transmission module in the apparatus.