A method and device for processing signals

Abstract

The present invention provides a method and device for signal processing, which are used to solve the problem that in the prior art, in a system where the proportion of the transition zone to the entire bandwidth is very low, the use of the existing FIR filter will cause low spectrum utilization and resource Expensive, complex design problems. In the embodiment of the present invention, filter design requires the original signal to be subjected to orthogonal decomposition, and an FIR filter is generated according to the number of layers of the orthogonal decomposition and the edge high-frequency bandwidth of the original signal after the orthogonal decomposition, and the FIR filter is used for all The edge high-frequency signal of the original signal is filtered, and the filtered signal and low-frequency signal are passed through an orthogonal filter bank for signal synthesis processing. Since the present invention decomposes the signal step by step, the bandwidth of the decomposed high-frequency signal is narrowed relative to the entire original signal, while the bandwidth of the transition band is fixed, the order of the generated FIR filter is reduced, and the amount of calculation is greatly reduced. The resource overhead is reduced and the design process is simplified.

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

Images