In this paper, we investigate the impact of using improper Gaussian signaling (IGS) scheme on the interweave cognitive radio (CR) paradigm when the cognitive user has access to full or partial channel-state-information (CSI). Throughout this work, we analyze the performance of both the primary user (PU) and secondary user (SU) in terms of instantaneous achievable rate and outage probability, for given sensing and detection capabilities. Then, we optimize the IGS scheme for full and partial CSI scenarios to maximize the achievable rate of the SU while maintaining a minimum quality-of-service (QoS) requirement for the PU. Meanwhile, we derive the corresponding feasibility conditions for the interweave cognitive radio system operation. IGS based systems are proven to provide notable gain over the conventional proper Gaussian signaling, which is considered our benchmark scheme. The IGS scheme is observed to be further beneficial at low SU detection capabilities, strong interference from the cognitive user to the licensed user, and low gain of the PU direct link.

中文翻译：

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不正确高斯信令在具有完整和部分 CSI 的交织认知无线电中的好处

在本文中，我们研究了当认知用户可以访问全部或部分信道状态信息 (CSI) 时，使用不正确的高斯信令 (IGS) 方案对交织认知无线电 (CR) 范式的影响。在整个工作中，对于给定的传感和检测能力，我们分析了主要用户 (PU) 和次要用户 (SU) 在瞬时可实现速率和中断概率方面的性能。然后，我们针对完整和部分 CSI 场景优化 IGS 方案，以最大化 SU 的可实现速率，同时保持 PU 的最低服务质量 (QoS) 要求。同时，推导出了交织认知无线电系统运行的相应可行性条件。事实证明，基于 IGS 的系统比传统的适当高斯信号提供了显着的增益，这被认为是我们的基准计划。观察到 IGS 方案在低 SU 检测能力、认知用户对许可用户的强干扰以及 PU 直接链路的低增益方面更有利。