Method for processing communication signals and communication receiver

Abstract

The invention relates to a method and a device for processing communication signals. The method comprises the steps of simulating and filtering interference of adjacent frequency bands of radio frequency analog signals to be processed, performing down conversion to enable simulated and filtered signals to be in the intermediate frequency to obtain intermediate frequency signals, converting the intermediate frequency signals into digital signals, performing digital filtering to the digital signals to obtain single side band signals or obtain the single side band signals and carrier frequency information, performing down conversion to enable digitally-filtered signals to be in base bands, and filtering signals formed by splicing positive and negative frequency components of original base band signals caused by the down conversion operation to obtain the original base band signals. The method and the device for processing the communication signals can improve communication quality when adjacent frequencies of a communication system with coexist.

Description

technical field [0001] The present invention relates to the communication field, in particular to a communication signal processing method and a communication receiver. Background technique [0002] Wireless communication systems are developing rapidly around the world, and at the same time, wireless spectrum resources are becoming increasingly scarce. Under the unified coordination of ITU, each country and region has its own spectrum allocation and application. In order to ensure the normal development of various applications, protection isolation bands have to be divided between frequency bands occupied by various applications. These protection isolation bands do not carry any useful information, and are wasteful in nature. The width of the isolation band depends not only on the characteristics of the application using this frequency band, but also on the performance level of the current RF filter. Taking the current popular LTE communication system as an example, if the...

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Problems solved by technology

On the other hand, communication systems such as 2G, 3G, and 4G all use double-sideband modulation, and information in double-sideband modulation is redundant. It is actually very useful to use this redundant frequency band to combat adjacent frequency interference. The use of filters in the radio frequency section cannot achieve the ideal effect of filtering out single-sideband signals, but can only be achieved in the digital field

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