参数资料
| 型号： | COREFIR-RM |
| 厂商： | Microsemi SoC |
| 文件页数： | 13/67页 |
| 文件大小： | 0K |
| 描述： | IP MODULE COREFIR |
| 标准包装： | 1 |
| 系列： | * |
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Fully Enumerated Filter
Fully Enumerated Filter Symmetry
Many FIR filters are symmetric. The fully enumerated filter exploits the filter symmetry to minimize the
number of physical MACs required for the implementation. Figure 8 shows the impulse response for a 9-tap
symmetric filter. In this filter c(0) = c(8), c(1) = c(7), c(2) = c(6), and c(3) = c(5) . When exploited, the
symmetry can substantially reduce the number of multipliers. The symmetric FIR filter implementation first
adds together the data samples that engage equal coefficients. Figure 9 shows the corresponding functional
block diagram.
c(1)
c(7)
c(0)
c(2)
c(3)
c(4)
c(5)
c(6)
c(8)
Figure 8 · Symmetric FIR Filter Impulse Response
z -1
z -1
z -1
z -1
x(i)
c(0)
z -1
c(1)
z -1
c(2)
z -1
c(3)
z -1
c(4)
y(k)
Figure 9 · Symmetric FIR Filter
There are a few types of symmetry. Figure 8 shows an example of an odd symmetry, where the number of
taps is odd, and a central tap is unique. Even symmetry is applied to a filter with an even number of taps.
The even symmetric filter does not have a unique center tap.
c(1) = -c(6), c(2) = -c(5), and c(3) = -c(4) . Similarly, odd anti-symmetric filters exist. The core exploits all four
symmetry types to nearly double the tap number, given the same number of mathblocks utilized.
c(1)
c(4)
c(5)
c(7)
c(0)
c(2)
c(3)
c(6)
Figure 10 · Even Anti-Symmetric FIR Filter Impulse Response
14
CoreFIR v8.5 Handbook
相关PDF资料 |
PDF描述 |
|---|---|
| COREPCIF-RM | IP MODULE COREPCIF |
| COREU1LL-AR | IP MODULE COREU1LL |
| COREU1PHY-AR | IP MODULE COREU1PHY |
| CORR-8BIT-XM-UT2 | SITE LICENSE IP CORRELATOR XP |
| CP2-GSA-L | CONN SHIELD LOWER TYPE A 22 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| COREFIR-UR | 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CoreFIR Finite Impulse Response (FIR) Filter Generator |
| COREFIR-XX | 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CoreFIR Finite Impulse Response (FIR) Filter Generator |
| COREMP7 | 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CoreMP7 |
| COREPCI-AN | 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CorePCI v5.41 |
| COREPCI-AR | 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CorePCI v5.41 |
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