Selective mapping (SLM) and partial transmit sequence (PTS) are attractive schemes for mitigating the high peak power inherent in orthogonal frequency division multiplexing (OFDM) signals. However, the high computational complexity and redundant side information (SI) bits have been identified as the main limitations for such techniques. The high computational complexity is mainly due to the need to perform several inverse fast Fourier transforms (IFFTs), and phase optimization process at the transmitter side. Therefore, this paper presents new SLM and PTS designs using a low complexity T-transform rather than IFFT. The use of the T-transform with SLM achieves a considerable computational complexity and peak-to-average power ratio (PAPR) reduction. Furthermore, we apply the T-transform to PTS and derive two different configurations that compromise the SI requirements and PAPR reduction. All the proposed schemes do not affect the original power spectrum of OFDM signals. The complexity analysis show that the proposed schemes have much lower complexity as compared to conventional schemes. Moreover, simulation results demonstrate that the proposed schemes are resilient to dispersion arising from multipath propagation, which is due to the frequency diversity introduced by the T-transform.

中文翻译：

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使用 T-OFDM 的选择性映射和部分传输序列的有效设计

选择性映射 (SLM) 和部分传输序列 (PTS) 是减轻正交频分复用 (OFDM) 信号固有的高峰值功率的有吸引力的方案。然而，高计算复杂度和冗余边信息 (SI) 位已被确定为此类技术的主要限制。高计算复杂度主要是由于需要在发射机侧执行多次快速傅立叶逆变换 (IFFT) 和相位优化过程。因此，本文介绍了使用低复杂度 T 变换而不是 IFFT 的新 SLM 和 PTS 设计。将 T 变换与 SLM 结合使用可实现相当大的计算复杂度和峰均功率比 (PAPR) 降低。此外，我们将 T 变换应用于 PTS，并推导出两种不同的配置，这些配置折衷了 SI 要求和 PAPR 降低。所有提出的方案都不影响OFDM信号的原始功率谱。复杂性分析表明，与传统方案相比，所提出的方案具有低得多的复杂性。此外，仿真结果表明，所提出的方案对多径传播引起的色散具有弹性，这是由于 T 变换引入的频率分集。