This paper investigates the uplink capacity of single-input single-output (SISO) systems assisted by a swarm of network-controlled repeaters (NCRs). We develop a rigorous wideband formulation based on OFDM signaling. Starting from the continuous-time passband model, we derive the capacity expression for the repeater-assisted OFDM channel, accounting for amplified noise contributions from multiple repeaters. Numerical results demonstrate that NCRs can substantially enhance system capacity even with simple activation strategies, and that activating only the closest repeater yields nearly the same performance as activating all repeaters, thereby offering significant energy-saving opportunities. These findings highlight the potential of NCR swarms as a cost-effective and scalable solution for coverage extension and capacity enhancement in wideband wireless networks.

翻译：本文研究了由网络控制中继器（NCR）群辅助的单输入单输出（SISO）系统的上行链路容量。我们基于OFDM信号构建了严格的宽带模型。从连续时间通带模型出发，推导了中继器辅助OFDM信道的容量表达式，并考虑了多个中继器放大噪声的影响。数值结果表明，即使采用简单的激活策略，NCR也能显著提升系统容量，且仅激活最近的中继器即可达到与激活所有中继器几乎相同的性能，从而提供了重要的节能潜力。这些发现凸显了NCR群作为一种经济高效且可扩展的解决方案，在宽带无线网络覆盖扩展和容量提升中的潜力。