关键词: 零中频接收机, 直流偏差, I／Q不平衡, LTE

Abstract:

Zero intermediate frequency（ZIF）receiver can convert RF signal directly to baseband signal.They have many advantages， for example low cost，compact size，easy integratability，etc.In this paper，the architecture of ZIF receiver is first introduced， followed by the analysis of the associated RF impairments，for instance the DC offset，local oscillator（LO）leakage，I/Q imbalance，etc.In the design of ZIF receiver.Furthermore，we propose a solution to overcome the deficiency of the existing LTE ZIF receivers.Our simulation results show that the proposed scheme can significantly compensate the RF impairment and thus improve the ZIF receiver’s performance.

Key words: ZIF receiver, DC offset, I／Q imbalance, LTE