AMC and HARQ: How to Increase the Throughput

作者：Jabi Mohammed^*; Szczecinski Leszek; Benjillali Mustapha; Benyouss Abdellatif; Pelletier Benoit

来源：IEEE Transactions on Communications, 2018, 66(7): 3136-3150.

DOI：10.1109/TCOMM.2018.2808262

• AMC
• block fading channels
• channel coding
• HARQ
• hybrid automatic repeat request
• incremental redundancy
• rate adaptation

In this paper, we consider transmissions over block-fading channels and assume that adaptive modulation and coding (AMC) and hybrid automatic repeat request (HARQ) are implemented. Knowing that in high signal-to-noise ratio, the conventional combination of HARQ with AMC is counterproductive from the throughput point of view, we adopt the so-called layer-coded HARQ (L-HARQ). L-HARQ allows consecutive packets to share the channel and preserves a great degree of separation between AMC and HARQ; this makes the encoding and decoding very simple and allows us to use the available/optimized codes. Numerical examples shown in this paper indicate that L-HARQ can provide significant throughput gains compared to the conventional HARQ. The L-HARQ is also implemented using turbo codes, indicating that the throughput gains also materialize in practice.

• 出版日期2018-7