Method and device for processing signals

Abstract

The invention provides a method and device for processing signals, which is used for solving the problems of low spectrum utilization rate, high resource overhead and complex design caused by the adoption of the existing FIR (Finite Impulse Response) filter in a system with a very low proportion of a transition band relative to the whole bandwidth in the prior art. The embodiment of the inventioncarries out filter design, orthogonal decomposition is performed on a required original signal, an FIR filter is generated according to the layer number of orthogonal decomposition and the edge high frequency bandwidth of the original signal after orthogonal decomposition, an edge high frequency signal of the original signal is filtered by adopting the FIR filter, and the filtered signal and a low-frequency signal are enabled to pass through an orthogonal filter bank for signal synthesis processing. The method adopts step-by-step decomposition on the signal, and the bandwidth of the decomposedhigh-frequency signal is narrowed relative to the whole original signal, so that the order of the generated FIR filter is reduced because the bandwidth of the transition band is constant. In addition, the calculation amount is greatly reduced, the resource overhead is small, and the design process is simpler and more convenient.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for processing signals. Background technique [0002] The LTE (Long Term Evolution, long-term evolution) signal system currently in use has a frequency utilization rate of 90%, and the remaining signal bandwidth is used as the transition band of the filter for FIR (Finite Impulse Response, finite-length unit impulse response) filter filtering to solve The out-of-band noise floor of the baseband signal output by the physical layer of the existing LTE system is relatively high, and the signal out-of-band spurs and ACLR (Adjacent Channel Leakage Power Ratio, Adjacent Channel Leakage Ratio) problems. However, if the frequency utilization rate is still kept at 90% in the 5G system, there will be a transitional bandwidth of 10M-100MHz, resulting in waste of resources. [0003] Therefore, in the 5G system, the spectrum utilization rate will increase t...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for signal processing, which are used to solve the problem of low frequency spectrum utilization due to the use of FIR filters in the prior art in systems in which the transition band is relatively low in proportion to the entire bandwidth in the prior art. , with high resource overhead and more complex design problems

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