OFDM块状导频信道估计的研究及FPGA实现

正交频分复用（OFDM）技术以其抗多径衰落和高频带利用率的优点被广泛关注。由于在移动通信中信道的特性随时间变化，为了提高通信效率和通信质量，必须进行信道估计。考虑到块状导频信道估计算法适合于慢衰落信道的特点，提出了基于FPGA的块状导频信道估计算法的实现，得到一种既能保证性能和速度又适合硬件实现的简单算法，避免了繁琐的复数除法运算，节省了硬件资源。

Research of Block Type Pilot Channel Estimation and Its FPGA Realization

Orthogonal Frequency Division Multiplexing （OFDM）, for its high bandwidth efficiency and its robustness to multi-path delay, has attracted much attention. Because the characteristic of wireless communication channel is changing with time, the channel estimation must be implemented in order to improve the efficiency and quality of communication. In considering the fact that block type pilot channel estimation is suitable for slow fading channel, this paper proposes the FPGA-based realization block type pilot channel estimation. A simplified algorithm is developed, which is suitable for hardware implementation while ensures performance and speed of the estimation. Thus the diverse and complicated division operation of complex numbers is avoided and much memory saved.