夹捏天线差分空间调制与基于RSSI的辅助选择及低复杂度检测：方法与性能分析
Pinching-Antenna Differential Spatial Modulation with RSSI-Assisted Selection and Low-Complexity Detection: Methods and Performance Analysis
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中文总结 AI 辅助
本文提出夹捏天线辅助差分空间调制（PA-DSM），利用RSSI辅助选择与低复杂度检测，在无瞬时CSI下实现非相干传输，并推导性能界，验证其在6G场景中优于老化信道估计的相干方案。
中文摘要 AI 辅助
夹捏天线（PA）系统通过沿介质波导的有利位置发射信号，提供宏观空间可重构性。然而，利用这种灵活性通常需要信道知识来进行PA配置，这在动态传播环境中会引入大量开销。本文提出PA辅助差分空间调制（PA-DSM），通过空间索引选择和非相干数据检测实现数据传输，无需接收端的瞬时信道状态信息（CSI）。为在保持这种CSI高效操作的同时利用PA可重构性，我们引入一种慢时间尺度的接收信号强度指示（RSSI）辅助选择策略，从标量功率测量中识别出有利的PA子集。我们进一步将两阶段低复杂度最大似然（LC-ML）检测器专门用于相移键控（PSK）信号，获得闭式符号判决，消除了联合调制组合搜索，同时保留了穷举差分检测的最小化器。此外，在归一化公共K莱斯衰落条件下，开发了基于矩生成函数（MGF）的成对错误分析及相应的比特错误概率（BEP）界，揭示了差分秩和频谱、接收天线数量以及依赖于先前状态的信道（LoS）对齐如何影响错误性能。在代表性的室内办公室、室内工厂和街道峡谷第六代（6G）频率范围3（FR3）场景中的数值结果验证了分析趋势，并量化了PA-DSM在信道估计在导频传输之间老化时优于相干基准方案的时机。
英文摘要
Pinching antenna (PA) systems provide macroscopic spatial reconfigurability by enabling signal radiation from favorable locations along a dielectric waveguide. Exploiting this flexibility, however, typically requires channel knowledge for PA configuration, which can introduce substantial overhead in dynamic propagation environments. This paper proposes PA-assisted differential spatial modulation (PA-DSM), enabling data transfer with spatial index selection and non-coherent data detection without instantaneous channel state information (CSI) at the receiver. To exploit PA reconfigurability while preserving this CSI-efficient operation, we introduce a slow-timescale received signal strength indicator (RSSI)-assisted selection strategy that identifies a favorable subset of PAs from scalar power measurements. We further specialize a two-stage low-complexity maximum-likelihood (LC-ML) detector to phase shift keying (PSK) signaling, obtaining closed-form symbol decisions that remove the joint modulation-combination search while preserving the minimizer of exhaustive differential detection. Furthermore, a moment generating function (MGF)-based pairwise error analysis and the corresponding bit error probability (BEP) bound are developed under normalized common-K Rician fading, revealing how the difference rank and spectrum, number of receive antennas, and previous-state-dependent line-of-sight (LoS) alignment affect the error performance. Numerical results across representative indoor-office, indoor-factory, and street-canyon sixth-generation (6G) Frequency Range 3 (FR3) scenarios validate the analytical trends and quantify when PA-DSM outperforms coherent benchmark schemes whose channel estimates age between pilot transmissions.
发表机构
- Tampere University（坦佩雷大学）
- Chalmers University of Technology（查尔姆斯理工大学）
机构由 AI 辅助整理，请以论文原文为准。
