A method and device for canceling nonlinear interference
An interference cancellation and nonlinear technology, applied in the field of communication, can solve the problem of inflexible suppression of co-channel interference at the local end, and achieve the effect of suppressing the influence of co-channel interference at the local end and flexibly eliminating nonlinearity
Active Publication Date: 2019-11-29
HUAWEI TECH CO LTD
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Problems solved by technology
[0005] Embodiments of the present invention provide a method and device for canceling nonlinear interference, which are used to solve the problem of inflexibility in suppressing co-channel interference at the local end in the prior art
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0030] figure 1It is a same-frequency full-duplex communication system provided by the embodiment of the present invention. Site A (local end) and site B (opposite end) are a pair of microwave devices communicating with each other. The local end and the opposite end are only relative concepts. The system is in When sending and receiving signals at the same time and at the same frequency, the local end not only receives the useful signal S transmitted by th...
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Embodiments of the present invention provide a method and device for canceling non-linear interference. The method comprises: acquiring a non-linear distortion indicator of a local radio frequency transmission signal, and computing, according to the non-linear distortion indicator of the local transmission signal, an out-of-band distortion power of a local reception radio frequency signal; determining whether the out-of-band distortion power of the local reception signal is greater than a first threshold; computing a non-linear relationship of a local transmission channel, and reconstructing, according to the non-linear relationship of the local transmission channel, a local transmission digital baseband signal to obtain an interference cancellation signal; and if the out-of-band distortion power of the local reception signal is determined to be greater than the first threshold, then performing digital interference cancellation on a local reception digital baseband signal by using the interference cancellation signal.
Description
technical field [0001] The embodiments of the present invention relate to the communication field, and in particular, to a method and device for canceling nonlinear interference. Background technique [0002] As mobile data traffic continues to grow, network bandwidth has multiplied. Microwave backhaul is currently the main backhaul method, and the demand for transmission capacity needs to be continuously improved to meet the rapid growth of wireless network bandwidth. Due to limited microwave spectrum resources, it is particularly important to improve frequency utilization. [0003] The traditional communication methods are mainly time division duplex (Time Division Duplex, TDD) and frequency division duplex (Frequency Division Duplex, FDD). Frequency-division duplexing refers to the technique of sending and receiving at different frequencies but transmitting at the same time. Same-frequency full-duplex is a technology for two-way transmission at the same frequency at th...
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Login to View More IPC IPC(8): H04B1/525
CPCH04B1/525
Inventor 曹萍
Owner HUAWEI TECH CO LTD