基于空时分组编码的SC-FDE高速移动跳频通信系统信道估计算法

Channel Estimation Algorithm of SC-FDE High-speed Mobile FH Communication System Based on Space-time Block Coding

分集技术广泛应用无线移动通信系统中,利用空间分集除了提高系统增益,还可有效抑制信道衰落,提高系统的稳定性。单载波具有峰均比低和功放效率高等优点。介绍了一种适用于高移速突发通信系统下,基于空时分组编码Space Time Block Coding,(STBC)单载波频域均衡(Signal Carrier Frequency Domain Equalization,SC-FDE)技术的信道估计、均衡算法。该方法新颖,实现复杂度低,且估计信道更准确,同时可解决部分符号定时不准确的问题。验证结果表明,在多径扩展较大的信道中仍可获得较高的频率分集增益。

Diversity technology is widely used in wireless mobile communication systems.Using spatial diversity can not only improve system gain,but also effectively suppress channel fading and improve system stability.Single carrier has the advantages of low peak to average ratio and high power amplifier efficiency.A channel estimation and equalization algorithm based on Space Time Block Coding(STBC)Single Carrier Frequency Domain Equalization(SC-FDE)technology is introduced,which is suitable for high speed burst communication system.This novel method is characterized by low complexity and more accurate channel estimation.Meanwhile,it can solve the problem of inaccurate timing of some symbols.The simulation results show that more frequency diversity gain can be obtained in the channel with larger multipath expansion.