公开(公告)号：WO02056490A3

公开(公告)日：2003-02-13

申请号：PCT/US0200891

申请日：2002-01-10

Applicant: QUALCOMM INC

Inventor： PETERZELL PAUL E ,  SAHOTA KAMAL

IPC: H04B1/10 ,  H04B1/30 ,  H04B1/40

CPC classification number: H04B1/109 ,  H04B1/406

Abstract: A system and method for a multi-band direct conversion wireless communication receiver is presented. The system incorporates a low noise amplifier (LNA) configured to amplify received RF signals, a local oscillator (LO) configured to output a frequency, and I and Q channel mixers. Each mixer has a first input operatively coupled to the LNA, a second input operatively coupled to the LO output, and an output. The system further includes an adjustment mechanism configured to adjust drive level of the LO depending on a level of jammers detected by the receiver. Thus, the receiver may operate in multiple wireless communication bands and modes and meet the associated specifications.

Abstract translation: 提出了一种用于多频带直接转换无线通信接收机的系统和方法。 该系统包括配置成放大接收的RF信号的低噪声放大器（LNA），配置为输出频率的本地振荡器（LO）以及I和Q通道混频器。 每个混合器具有可操作地耦合到LNA的第一输入，可操作地耦合到LO输出的第二输入和输出。 该系统还包括调整机构，其被配置为根据接收器检测到的干扰程度来调整LO的驱动电平。 因此，接收机可以在多个无线通信频带和模式中操作并满足相关规范。