Non-orthogonal multiple access (NOMA) has a larger achievable sum rate than orthogonal multiple access (OMA). This superiority is achieved via superposition coding (SC) and successive interference cancellation (SIC). In this letter, the authors propose a lossless NOMA implementation without SIC. This implementation is achieved via correlated SC (CSC), in contrast to conventional independent SC (ISC). In addition, correlated non-SIC decoding is performed, in contrast to conventional SIC decoding. Using the random channel coding theorem, we prove that the conditional achievable sum rate given channel gain realizations in the conventional ISC/SIC NOMA scheme can be achieved without SIC, without loss, over the power allocation range of user-fairness.

中文翻译：

---

相关叠加编码：用户公平性下无 SIC 的无损两用户 NOMA 实现


非正交多址（NOMA）比正交多址（OMA）具有更大的可实现总速率。这种优势是通过叠加编码（SC）和连续干扰消除（SIC）实现的。在这封信中，作者提出了一种无需 SIC 的无损 NOMA 实现。与传统的独立 SC (ISC) 相比，该实现是通过相关 SC (CSC) 实现的。此外，与传统的SIC解码相比，执行相关的非SIC解码。使用随机信道编码定理，我们证明了在传统 ISC/SIC NOMA 方案中给定信道增益实现的条件可实现和速率可以在用户公平性的功率分配范围内无需 SIC、无损耗地实现。