NXP BGU7005 GPS LNA White Paper

About this manual

This white paper explains why adding an external low‑noise amplifier (LNA) improves GPS receiver performance in mobile handsets that also contain GSM, WCDMA and other radios. It discusses integration challenges, cohabitation issues such as cross‑modulation and wideband noise, and how the NXP BGU7005 LNA mitigates them.

The document details the BGU7005’s key parameters, filtering requirements, and practical design recommendations for achieving better GPS sensitivity, reduced time‑to‑first‑fix (TTFF), and compliance with out‑of‑band linearity specifications.

What's inside

• GPS Integration Challenge
• GPS and GSM-1800 Cohabitation
• Cross modulation that corrupts GPS reception
• Wideband noise power generated by jamming PA
• GPS and UMTS-FDD Cohabitation
• Conclusions
• Contents

Specifications

Frequently asked questions

What benefit does an external LNA provide for a GPS receiver?

An external LNA improves the receiver’s sensitivity, which shortens the time‑to‑first‑fix (TTFF).

How does the BGU7005 handle strong GSM jamming signals?

The BGU7005 maintains a low noise figure of 1.1 dB and provides an out‑of‑band IIP3 of +10 dBm, allowing it to tolerate strong GSM interference.