【摘要】 针对OFDM(正交频分复用)符号粗同步定时点会随路径能量变动的缺点,利用信道估计得出的信道脉冲响应,提出一种基于能量收集的精同步算法,不需设定判决门限,得到的最终定时点能有效避免ISI(符号间干扰)和ICI(信道间干扰)的引入。多径信道中的仿真验证了该算法的良好性能。更多还原

【Abstract】 Start positions estimated by coarse symbol synchronization continually vary with the path energies in OFDM systems.Based on the channel impulse response derived from the channel estimation method,a fine symbol synchronization algorithm by energy collection is proposed in this paper.The proposed technique needs no more the decision threshold,and the final timing position can almost avoid the introduction of the ISI and ICI.Simulations in the multipath channel indicate its better performance.更多还原