LAT模型频谱感知机制的性能优势研究

Study on advantage of spectrum sensing for LAT protocol

通过自干扰消除技术,基于LAT(Listen-And-Talk)模型的全双工认知无线电使得次用户具备了在传输数据的同时进行频谱感知的能力。该频谱感知机制打破了传统感知时隙和发送时隙的划分,使频谱利用更加高效。通过建立风险函数的方法,从数据冲突和资源浪费的角度衡量了LAT模型与传统LBT(Listen-Before-Talk)模型的不同,并从感知机制上论证了LAT模型的优势。

Due to the development of self-interference cancellation technique, the full duplex cognitive radio LAT （Listen-And-Talk） protocol enables secondary users to perform spectrum sensing and transmitting sim ultaneously. LAT sensing mechanism breaks the traditional division of time slots, and utilizes the spectrum more efficient. By establishing a risk function, LAT protocol is proved that it can outperform the LBT （Listen Before-Talk） protocol in terms of the sensing mechanism, and specifically, LAT protocol share a lower risk in data collision and spectrum waste.