Huawei Technologies Co., Limited

Guixue Zhao

Tianxiang Wang

Wei Zhang

Jun Feng

Dejun Li

Yongjun Tu

Jixiong Yin

Xinshi Hu

Xiaobin Song

Jianbin Huang

Zhiyong Qiu

Embodiments of the present invention provide a channel bandwidth switching method and network equipment. In the method, an MSE is acquired; a target bandwidth of a first space link is acquired according to the MSE and a correspondence between the target bandwidth of the space link and the MSE; in a case in which the signal has an interfering signal outside the operating bandwidth, the interfering signal is acquired; it is determined, according to the interfering signal and an error-free threshold, whether the operating bandwidth can be switched to the target bandwidth of the first space link; and if it is determined that the operating bandwidth can be switched to the target bandwidth of the first space link, information that carries the target bandwidth of the first space link is sent to the second network element, thereby avoiding a problem such as interruption of signal transmission.

Channel bandwidth switching method and network equipment

A method for canceling adjacent channel interference includes: receiving signal of a first channel, where an interference signal of a second channel remains in the signal of the first channel, and the second channel and the first channel are adjacent channels; receiving a cancellation signal provided by the second channel for canceling the interference signal; filtering the received cancellation signal; adjusting a frequency of the filtered cancellation signal; multiplying the cancellation signal with the adjusted frequency by a gain factor to obtain a signal to be cancelled; and subtracting the signal to be cancelled from the signal of the first channel, and canceling the interference signal to obtain a signal to be decoded. According to the technical solutions provided in the embodiments of the present invention, interference signals of adjacent channels are cancelled, and the signal to noise ratio is improved.

Method, modem, and system for canceling adjacent channel interference

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.

Method, apparatus, and system for microwave signal correction

A diversity transmission method in the field of wireless communications technologies includes: classifying services to be transmitted, where the classifications include a high-priority service and a low-priority service; transporting the high-priority service to a first channel and a second channel at the same time to transmit the high-priority service in a diversity protection way, and transporting the low-priority service to the first channel or the second channel to transmit the low-priority service in a non-diversity protection way. The embodiments of the present invention further provides a corresponding method, apparatus and system for diversity reception, and an apparatus and a system for diversity transmission. In the embodiments of the present invention, it is implemented that a spectrum utilization rate is effectively improved and the reliability of diversity transmission of the high-priority service is ensured.

Method, apparatus, and system for diversity transmission and reception

The present invention relates to a communication transmission field, and particularly provides a device, a method, and a system for aligning an antenna. The method includes steps as follows. An input signal is received, and a receiver signal strength indication (RSSI) value is output according to a strength of the input signal. The RSSI value is received, and a practically received power value corresponding to the input signal is acquired by looking up a corresponding table between the RSSI and power. An antenna rotation signal and an alignment indication signal are output. The antenna is adjusted according to the antenna rotation signal so as to change a receiving angle of the antenna. Then, it is displayed that the antenna is aligned according to the alignment indication signal. In the present invention, the man-made operation errors are reduced, thus the network quality is effectively ensured.

Device, method and system for aligning an antenna

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.

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

A demodulation circuit, a digital microwave system including the demodulation circuit, and a signal demodulation method are provided. The demodulation circuit includes a first circuit, a second circuit, a third circuit, and a fourth circuit connected in turn. The fourth circuit includes a pulse counting unit and a data decision unit connected in turn. The signal demodulation method includes: performing bandpass filtering on input signals; increasing gains of the bandpass filtered signals; extracting pulse signals are extracted from the gain-increased signals; counting the extracted pulse signals; filtering the pulse signals having counting values falling outside of a predetermined range, and outputting the filtered pulse signals.

Demodulation circuit, digital microwave system and demodulation method

A method provided by the present invention for transmitting overhead information, includes dividing and reforming overhead information into at least two overhead parts, inserting the at least two overhead parts into overhead bytes of at least two corresponding data frames, and transmitting the at least two overhead parts via the at least two data frames which are microwave frames. Overhead information transmitting apparatus and overhead information receiving apparatus are also provided by the present invention. With the method and apparatus of the present invention, the channel bandwidth resources occupied by the overhead bytes or each microwave frame are greatly reduced. If the saved channel bandwidth is used for performing the error correction code on the transmitted information, the code gain is improved and the sensitivity requirement on the receiver is reduced so that the cost of a microwave transmitting system is reduced eventually.

Method and apparatus for transmitting overhead information

An intermediate frequency receiving circuit and an intermediate frequency receiving method are provided. The intermediate frequency receiving circuit includes an inductor-capacitor (LC) resonance circuit whose primary resonance frequency is a central frequency of received signals. The LC resonance circuit receives intermediate frequency signals and suppresses transmitted signals and control signals. A band-pass filter connected to the LC resonance circuit filters the transmitted signals and control signals. An automatic gain control circuit connected to the band-pass filter compensates the attenuation of an intermediate frequency cable. A low-pass filter connected to the automatic gain control circuit compensates an in-band flatness. An analog-to-digital converter connected to the low-pass filter performs a sampling and digital demodulation on the received signals.

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Shenzhen, China

Guixue Zhao