An investigation of throughput performance for STANAG 5066 when utilizing STANAG 4539 high data rate HF waveforms

The use of automatic repeat and request (ARQ) systems have become widespread in the HF community because they can provide "error-free" data delivery over unreliable links. STANAG 5066 (S _5066) is an ARQ protocol which was adopted as the official NATO interoperable ARQ protocol for use on HF by NATO Allied forces. S_5066 is an adaptive ARQ system and one of its goals is to maximize throughput. In order to accomplish this, algorithms that select on-air data rate and interleaver size for a given channel condition are required. This paper investigates the throughput performance of S_5066 when utilizing STANAG 4539 (S_4539) high data rate (HDR) HF waveforms. Several HF channels are considered in order to determine which data rate and interleaver size provides the best performance for the particular channel condition. A set of recommendations is also provided to assist S_5066 ARQ designers in developing algorithms to select the appropriate data rate and interleaver size.