From: Low power reconfigurable FP-FFT core with an array of folded DA butterflies
This work | [Kai-Jiun] | [Chia] | [Song] | [Chu yu] | [Manish] | |
---|---|---|---|---|---|---|
Technology | 45 nm | 90 nm | 65 nm | 180 nm | 180 nm | 180 nm |
Voltage (Vdd) | 1.08 V | 1 V | 0.45 V | 1.8 V | 1.8 V | 1.8 V |
Architecture/algorithm | Array-based, DFPABF/radix-2 | MDC, 4-stream, Radix-4/8 | Mixed radix MDF | Flexible radix, MDF multiple stream | Pipelined, SDF | R2SDF |
FFT size/modes | Variable 64 to 2,048 | Variable 128 to 2,048 | Variable 128 to 2,048 | 128/256/512/1024 | Fixed 64 | Variable 128 to 2,048 |
1-4 streams | ||||||
Maximum frequency | 100 MHz | 40 MHz | 20 MHz | 300 MHz | 20 MHz | 40 MHz |
Word length | 64 bits | 16 bits (input) | 24 | 20 | 16 | 32 |
Memory | 3.25 KB internal memory (RAM + ROM) | Dual port SRAM (10,224 × 16 bits) | 48 KB of register file | Mixed SRAM | DL buffers | FIFO of varying sizes |
Core area | 0.973 mm2 | 3.1 mm2 | 1.375 mm2 | 3.2 mm2 | 0.88 mm2 | 4.52 mm2 |
Power consumption | 68 mW | 63.72 mW | 4.05 | 507 mW at 512 points | 9.79 mW | 55.64 mW |
Normalized area | 0.475 | 1.51 | 0.858 | 1.25 | 3.45 | 0.275 |
Normalized power | 0.332 μw | 3.62 μw | 1.51 μw | 3.8 μw | 11 μw | 0.489 μw |