Citation
Abstract
In previous studies, the technique of Automatic Repeat Request (ARQ) link analysis and planning was discussed in the context of effective data rate, throughput, latency, and frame error rate under the constraint that the signal-to-noise ratio (SNR) remains constant or has a Gaussian distribution during the ARQ communications session. Although these models may be valid at S-band (2.3 GHz) and X-band (8.4 GHz), they may not necessarily be valid for Ka-band (26 GHz or 32 GHz downlink) and optical links, where there is more variation due to atmosphere. Given that the constant SNR scenario may not be valid over a long time horizon and the Gaussian assumption may not be fully valid for flight conditions, we explored the ARQ channel using real SNR distributions derived from deep-space flight data acquired at Ka-band (32 GHz). In this report, we examine the Ka-band ARQ channel in the context of identifying optimum SNR settings and latency.
Details
- Volume
- 42-218
- Published
- August 15, 2019
- Pages
- 1–14
- File Size
- 377 KB