GPS Receiver Frontend Design for Radio Frequency Interferences and Noise Cancellations

This article proposes integrated GPS receiver frontend design, performance optimization and low power dissipation. The proposed frequency synthesizer with a cross coupled negative-resistance multiple-gated circuit (NRMGC) voltage-controlled oscillator (VCO) by employing a transformer-based LC-tank achieves low phase noise. The proposed design chooses decoupling effect to decrease coupling inductances and then decrease quality factors to obtain higher oscillation frequency and wide tuning range. The eye pattern measured results demonstrate that receiver frontend for radio frequency interferences achieves optimized GPS (global positioning system) performance.