Research Article
Design Considerations When Accelerating an FPGA-Based Digital Microphone Array for Sound-Source Localization
Table 6
Timing analysis without any optimization of the design under evaluation. The values are expressed in
s.
| | Parameter | Definition | Values [s] |
| | Initiation interval of the CIC filter | 4.5 | | Initiation interval of the removed DC block | 9 | | Initiation interval of the FIR filter | 72 | | Initiation interval of the delay memories | 480 | | Initiation interval of the cascaded sums | 3.5 | | Initiation interval of the power calculation | 1 |
| | Initiation interval of the filter stage | 85.5 | | Initiation interval of the beamforming stage | 484.5 | | Initiation interval of the power stage | 1 |
| | Sum of all initiation intervals | 571 | | Sensing time | 2048 |
| | Execution time of one orientation | 2650 | | Time required to obtain a polar power map | 169600 |
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