The AOA improvement from using the steering vectors package requires some additional processing to provide best performance. The increase in processing time can be quantified per-detected point, as the steering vector package runs only on the range bins with detected points. A breakdown of this timing can be seen below, and this results in approximately 150μsec per detected point with an added 676μsec fixed processing time for initialization. This results in increased power consumption, since this increases the time the device spends in processing (80-120mW) instead of deep sleep mode (0.48-0.67mW). The exact amount of increased power consumption can be measured, and this depends on the chirping parameters, frame rate, and sleep settings.

Figure 2-5 Processing Time vs # of Detected Points