A kind of fir filter filtering method and filter
A filter and sub-filter technology, applied in the information field, can solve the problems of increasing the bit width of the multiplier, limiting the application of the filter, and not being directly applicable to the parallel FIR filter.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0063] An embodiment of the present invention provides an FIR filter filtering method, wherein the order of the filter coefficient vector H(n) of the filter is N, and the length of the input data vector X(m) is M. Specifically, as figure 1 As shown, the method includes:
[0064] 101. A first multiplier included in the filter is used to obtain (X(m)+X(m+Q))*(H(n)+H(n+Q)).
[0065] where 1<=Q<=N.
[0066] 102. The filter is further used to obtain X(m)*H(n+Q) and X(m+Q)*H(n).
[0067] 103. The filter, according to the obtained (X(m)+X(m+Q))*(H(n)+H(n+Q)), X(m)*H(n+Q) and X(m+Q)*H(n) to obtain X(m)*H(n)+X(m+Q)*H(n+Q).
[0068] The purpose of the present invention is to obtain X(m)*H(n+Q), X(m+Q)*H(n), X(m)*H(n)+X(m) in the prior art +Q)*H(n+Q) requires four multipliers to realize, that is, as figure 2 shown.
[0069] In this scheme, X(m) and X(m+Q), as well as H(n) and H(n+Q) are combined and added together and then multiplied by the first multiplier M1 to obtain X(m)*H (n...
Embodiment 2
[0084] The embodiment of the present invention provides a method for FIR filter filtering. The method is specifically as follows: the order of the filter coefficient vector H(n) is N to be 8, the length of the input data vector X(m) is 24, and the downsampled The multiple L is 2, and Q is 2 as an example for detailed description. At this time, the filter includes the first sub-filter to the ninth sub-filter. Specifically, such as Figure 5 As shown, the method includes:
[0085] 501. The p-th sub-filters of the first to ninth sub-filters respectively include four first multipliers, wherein the j-th first multiplier among the four first multipliers The device obtains (X(L*(p-1)+j+[j / 2]*2)+X(L*(p-1)+j+[j / 2]*2+Q))*(H(j+ [j / 2]*2)+H(j+[j / 2]*2+Q)).
[0086] Wherein, j is i, i+1, i is an even number, and i>=0, p is an even number, and p<=(M-N+L) / L.
[0087] 502. The p-th sub-filter is also used to obtain X(L*(p-1)+j+[j / 2]*2)*H(j+[j / 2]*2+Q) and X(L *(p-1)+j+[j / 2]*2+Q)*H(j+[j / 2]*2...
Embodiment 3
[0160] An embodiment of the present invention provides an FIR filter, wherein the order of the filter coefficient vector H(n) of the filter is N, the length of the input data vector X(m) is M, and the downsampling multiple is L , specifically, such as Figure 16 As shown, the filter includes the first sub-filter to the (M-N+L) / L sub-filter, wherein,
[0161] The filter comprises a first multiplier M1 for obtaining (X(m)+X(m+Q))*(H(n)+H(n+Q)), where , 1<=Q<=N;
[0162] The filter is also used to obtain X(m)*H(n+Q) and X(m+Q)*H(n) respectively;
[0163] The filter, according to the obtained (X(m)+X(m+Q))*(H(n)+H(n+Q)), X(m)*H(n+Q) and X( m+Q)*H(n), obtain X(m)*H(n)+X(m+Q)*H(n+Q) respectively.
[0164] Further, if Q=2, and the downsampling multiple of the filter is L=2, the filter includes the first sub-filter to the (M-N+L) / L sub-filter ;
[0165]Wherein, the p-th sub-filter from the first sub-filter to the (M-N+L) / L-th sub-filter includes N / 2 of the first multipliers, whe...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com