CAJ | 학술논문

根据LTE系统信号帧结构的特点，提出一种基于PDCCH的干扰谱估计方法。该方法利用PDCCH信道调制编码方案相对固定、时频维度上规律出现的特点，通过信号解调解码去掉干扰对信号的影响，通过比较接收信号和再生PDCCH信号检测出系统中存在的干扰谱。单天线模式下，提出一种利用PDCCH译码结果的迭代信道估计方法，可以有效提高干扰谱估计精度。此外，还提出了多天线模式下干扰谱估计方案。仿真试验结果表明，本算法可以精确估计LTE系统可能存在的干扰信号频谱特性。
근거LTE계통신호정결구적특점，제출일충기우PDCCH적간우보고계방법。해방법이용PDCCH신도조제편마방안상대고정、시빈유도상규률출현적특점，통과신호해조해마거도간우대신호적영향，통과비교접수신호화재생PDCCH신호검측출계통중존재적간우보。단천선모식하，제출일충이용PDCCH역마결과적질대신도고계방법，가이유효제고간우보고계정도。차외，환제출료다천선모식하간우보고계방안。방진시험결과표명，본산법가이정학고계LTE계통가능존재적간우신호빈보특성。
Based on the characteristics of the LTE signal frame structure, a PDCCH-based interference spectrum estimation method is proposed. Considering the PDCCH channel appears regularly in both time and frequency domain, and it′s modulation and coding scheme constant, the proposed method removes the interference by demodulation and decoding, detects the interference spectrum exist in the system via compaves the received signal and the regenerated signal. For single antenna mode, a iterating channel estimation method is proposed by exploiting PDCCH decoding results, which can effectively improve the accuracy of interference spectrum estimation. In addition, an interference spectral estimation scheme is also proposed for multi-antenna mode, simulation results shown that the proposed algorithm can accurately track the interference spectrum exist in the LTE system.