Signal processing method, device and system

Abstract

The embodiment of the present invention discloses a signal processing method, device, and system, wherein the method includes: receiving a downlink signal carrying an uplink signal; using an estimated self-interference signal to perform first interference cancellation on the uplink signal, so as to Making the residual interference amount of the uplink signal smaller than the first interference threshold can realize that the out-of-band interference of the uplink signal to the downlink signal can be reduced to a minimum without using multiple radio frequency front ends or without using a duplexer at the same radio frequency front end, Since the embodiment of the present invention does not use a duplex filter, it can improve the deployment difficulty and cost of the base station and the system, and can also reduce the extra energy consumption of the mobile terminal.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a signal processing method, device, and system. Background technique [0002] In order to receive and transmit signals asynchronously on multiple frequency bands, each frequency band usually corresponds to a radio frequency front-end. If the same radio frequency front-end is used for asynchronous transmission and reception of different frequency bands, it will cause the analog-to-digital converter (Analog-to- Digital Converter, ADC) saturation, for example, the maximum power of the transmitted signal is 30dBm, the power of the received signal is -90--50dBm, although the self-interference signal and the received signal are in different frequency bands, but the ADC will convert all the signals in the frequency band are included for sampling, so the self-interfering signal will drown the received signal in the noise. [0003] figure 1 The archit...

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Problems solved by technology

[0004] However, the technology of separating the transmitted signal and the received signal based on the duplex filter has the following problems. For example, the cavity duplex filter used by the base station has the characteristics of large size and high cost, which will increase the difficulty and cost of system deployment; another example , the dielectric duplex filter used by the mobile terminal has the characteristics of high energy consumption, which will greatly reduce the reception quality of the received downlink signal

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