CAJ | 학술논문

为了提高插入了保护间隔的无线通信系统的传输带宽利用效率,提出了一种可以用作时域信道估计的特殊保护间隔实现方式.所提出的保护间隔信号由已知可变符号序列构成,通过插入此种特殊的保护间隔,接收机可以实现低复杂度的时域信道估计,从而节省了原本传输导频信号的带宽,也因此提高了系统的带宽利用率.为了在新的系统中继续使用单抽头的频域均衡器,还给出了一种循环卷积恢复的方法用于重建信号和信道之间的循环卷积关系.仿真结果证明,该方案能取得良好的性能.
위료제고삽입료보호간격적무선통신계통적전수대관이용효솔,제출료일충가이용작시역신도고계적특수보호간격실현방식.소제출적보호간격신호유이지가변부호서렬구성,통과삽입차충특수적보호간격,접수궤가이실현저복잡도적시역신도고계,종이절성료원본전수도빈신호적대관,야인차제고료계통적대관이용솔.위료재신적계통중계속사용단추두적빈역균형기,환급출료일충순배권적회복적방법용우중건신호화신도지간적순배권적관계.방진결과증명,해방안능취득량호적성능.
To enhance the bandwidth efficiency of the guard interval (GI) assisted wireless communication system, an attractive scheme is proposed, which combines the functions of pilots and the GI together, so that the pilot resource used for estimating channel state is saved. Based on the proposed different known guard intervals (DKGI), the time-domain channel estimation can be simply applied on the receiver side. After channel estimation, the receiver can employ the cyclic convolution restoring (CCR) function to reconstruct the cyclical convolution relationship between the signal and the channel, by which the receiver can also achieve good performance through the conventional 1-tap frequency domain equalization (FDE).