摘要
MIMO-OFDM系统信道估计的目的在于识别每组发送天线与接收天线之间的信道冲击响应。LS算法是MIMO-OFDM信道估计中最常用的估计算法,但LS的频域信道估计要受到频域噪声的影响。在实际系统中,考虑到非理想因素的存在,该估计还要受到载波间干扰(ICI)噪声的影响。这使得LS算法本身的估计精度不高,很难满足实际中的需要。因此为了减小这些噪声对估计性能的影响,本文对LS算法进行了加窗改进,从而使估计精度得到了提高。
The channel estimation of MIMO-OFDM system is intended to identify the impulse response of channel between each transmitting antenna and receiving antenna.LS algorithm is the most common channel estimation algorithm used in the MIMO-OFDM system,but the frequency-domain LS channel estimation is often subject to frequency-domain noise.In a real system with non-ideal factors,the LS estimate is also influenced by inter-channel interference（ICI） noise.Those make the estimation accuracy of LS algorithm low and difficult to satisfy practical needs.In order to reduce the impact of those noises,this paper proposes a new approach to improve the LS algorithm with adding window,at the same time,the estimation accuracy is also improved.
出处
《微计算机信息》
2010年第24期111-112,110,共3页
Control & Automation
