摘要
提出一种新的基于最小二乘准则的频域信道估计算法,该算法设计了一种新的具有互补性的2个连续训练序列,对所有子载波的频率响应进行估计,减小了线性内插造成的误差,并在多普勒频移不同时采用不同的预估计值加权参数,有效地减弱了多普勒频移对估计精度的影响.仿真结果表明,此算法在不增加计算复杂度的前提下,有效地提高了估计精度.
A new channel estimation algorithm based on least square is proposed, which can estimate frequency responses of all sub-carriers using two consecutive training symbols. With this method, the errors posed by linear interpolation are lowered; the effect of Doppler shift on estimation accuracy is considerably reduced because of the use of different pre-estimated weighted factors corresponding to different Doppler shift. The research result proves that this new algorithm can improve the performance without increasing calculation complexity.
出处
《应用科技》
CAS
2008年第4期22-25,共4页
Applied Science and Technology
基金
哈尔滨市青年科学研究基金资助项目(2005AFQXJ047)
关键词
多输入多输出
正交频分复用
最小二乘
信道估计
muhiple-input muhiple-output （MIMO）
orthogonal frequency division muhiplexing （OFDM）
least square
channel estimation
