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Final Project Overall Design Presented By: Akram Ahmed Date: 19 November 2014 CMPE 691: Digital Signal Processing Hardware Implementation
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Outline Filter Design Window Design Complex Number Absolute Value Calculation City Distance Spectral Density Design FFT Latency and selection Overall Design
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Filter Design Number of Taps: 201 Max Filter Coeff = 0.774121 Min Filter Coeff Value = -0.181664 Coeff representation = 1.9, signed 2’s compliment
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Window Design Max Window Coeff = 1 Min Window Coeff Value = 0.000003 (non-zero) Coeff representation = 1. 9, unsigned
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Combined Filter and Window
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Spectral Density
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FFT Number of Inputs: 1024 Target Design Frequency: 50 MHz (20ns) FFT Latency = FFT calculation time + drain time For Radix 2 lite FFT Latency = 246.360 s + 1024 * 20 ns = 0.26648 ms For Radix 2 Burst I/O FFT Latency = 146.680 s + 1024 * 20 ns = 0.16716ms For Radix 4 Burst I/O FFT Latency = 68.620 s + 1024 * 20 ns = 0.0891ms For Pipeline Streaming FFT Latency = 43.120 s + 1024 * 20 ns = 0.0636ms
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Overall Design
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FIR IP Core
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FIR Simulation
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FIR Matlab f = fopen ('filtInp','w'); filtLen = length(y1); for i = 1:1:filtLen nonF = fi(y1(i),1,16,0); fprintf(f,'%s,\n', nonF.bin); fix = strcat(nonF.bin,'.0'); y1(i) = fix2dec(fix); end
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FIR Simulated output and Matlab comp.
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FIR input
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Overall Design
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