Altera FIR Compiler Instrukcja Użytkownika Strona 33
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Chapter 3: Parameter Settings 3–9
Specify the Input and Output Specifications
© May 2011 Altera Corporation FIR Compiler User Guide
Figure 3–7 shows the result after you have made the selections. Note that the side
lobes of the fixed-point frequency response decrease when you change the bit width
from 8 (the default) to 12.
Specify the Input and Output Specifications
You can specify the Number of Input Channels (that is, the number of data streams
that generate an output for each stream) and the Input Number System in the
Parameterize - FIR Compiler page (Figure 3–7).
Figure 3–7. Analyzing the Coefficients
- FIR Compiler 1
- User Guide 1
- UG-FIRCOMPILER 11.0 2
- Contents 3
- Additional Information 4
- 1. About the FIR Compiler 5
- Delay Line 6
- Coefficient 6
- Multipliers 6
- Adder Tree 6
- Features 7
- Release Information 8
- Device Family Support 9
- MegaCore Verification 10
- Notes to Table 1–5: 11
- Notes to Table 1–6: 11
- Installation and Licensing 12
- 2. Getting Started 15
- Figure 2–4. Set Up Simulation 18
- Notes to Table 2–1 21
- Simulate the Design 22
- Simulating in MATLAB 23
- 3. Parameter Settings 25
- Specifying the Coefficients 26
- Note to Figure 3–6: 31
- Analyzing the Coefficients 32
- Bits Removed from MSB 34
- Bits Removed from LSB 34
- Note to Table 3–4: 36
- Note to Table 3–5: 37
- Note to Table 3–6: 38
- Resource Estimates 40
- Filter Design Tips 40
- 4. Functional Description 43
- Coefficient Scaling 44
- Symmetrical Serial 45
- Structure Types 48
- Serial Structures 49
- Multibit Serial Structure 49
- Interpolation and Decimation 50
- Figure 4–8. Signal Decimation 51
- Pipelining 54
- Simulation Output 55
- Avalon Streaming Interface 55
- Data Source Data Sink 56
- Packet Data Transfers 57
- ■ 00: No error 58
- ■ 01: Missing SOP 58
- ■ 10: Missing EOP 58
- ■ 11: Unexpected EOP 58
- Timing Diagrams 59
- Referenced Documents 68
- Structures 69
- Supported Device Structures 70
- Compiling HardCopy Designs 71
- How to Contact Altera 74
- Typographic Conventions 74
- Additional Information Info–3 75
- Info–4 Additional Information 76
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