摘要
传统的协作OFDM精确定时同步算法多以度量函数的能量作为判定条件来判定同步位置,使得算法同步位置为能量最强径而不是期望的第一径,针对这一问题,提出一种基于加权CAZAC序列的第一径精确检测算法。算法根据噪声功率设置自适应门限来实现第一径精确检测。仿真结果表明,所提方案在多径衰落信道下能实现第一径准确检测。
Traditional cooperative OFDM precise timing synchronization algorithm usually takes the measuring of the function energy as a judging criteria to determine the synchronization position,which makes the algorithm synchronization position is the path with strongest energy rather than the first arrival path usually expected.To tackle this problem,a first arrival path precise detection algorithm based on weighted CAZAC sequence is presented.The algorithm realizes first arrival path precision detection by setting self-adapting threshold according to noise power. Simulation results show that the proposed algorithm can realize first arrival path precise detection under the multi-path fading channel.
出处
《微处理机》
2017年第4期51-56,共6页
Microprocessors
