【摘要】 针对无线局域网(WLAN)系统中的宽带OFDM信号接收,提出了一种OFDM信号接收电路设计。设计的接收电路主要包括正交下变频电路和全直流耦合驱动电路两个部分,电路采用差分结构,能够有效抑制直流漂移和偶次谐波,满足对宽带OFDM信号的正交下变频接收、采样要求。其中提出的宽带信号全直流耦合驱动电路设计方法,可应用于其他宽带信号的采样驱动,特别是在高速采样驱动电路设计中,适应信号带宽可达到DC～1 GHz。通过实际测试结果,验证了设计方法的正确性和工程实用性。更多还原

【Abstract】 A design of the receive circuits was proposed for wideband OFDM signal in WLAN system.The design included two parts,the orthogonal down converter and DC coupling driver.A differential structure was adopted in the circuits,which can effectively restrain the DC drift and even order harmonic,and can meet the needs of orthogonal down converter and sampling.The depicted design of DC coupling driver for wideband signal can be applied to other designs,which were used in sampling driver for wideband signal,especially in high speed circuits,and the range of frequency bandwidth can reach up to DC-1 GHz.Finally,experiment results indicate the correctness of the design method and the engineering practicability.更多还原