Table 1 Different useful cases for the OFDM multicarrier transmission
From: DF-based sum-rate optimization for multicarrier multiple access relay channel
Decoding order | Decoding order | Case | |
|---|---|---|---|
at the relay | at the destination | ||
Direct transmission | N.A. | No decoding order | 1 |
The relay forwards x b [k] | x b [k] | x b [k]→x a [k] | 2 |
The relay forwards x a [k] and x b [k] | x b [k]→x a [k] | x b [k]→x a [k] | 3 |
The relay forwards x a [k] and x b [k] | x a [k]→x b [k] | x b [k]→x a [k] | 4 |
The relay forwards x a [k] | x a [k] | x a [k]→x b [k] | 5 |
The relay forwards x a [k] and x b [k] | x a [k]→x b [k] | x a [k]→x b [k] | 6 |
The relay forwards x a [k] and x b [k] | x b [k]→x a [k] | x a [k]→x b [k] | 7 |