{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lect25_RF Transceivers Case Studies II

# Lect25_RF Transceivers Case Studies II - ECE 620...

This preview shows pages 1–6. Sign up to view the full content.

ECE 620 Introduction to RF Integrated Circuits Prof. Waleed Khalil Lecture RF Transceivers: Case Studies II 25 1

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
WCDMA TX Leakage and Out-of-Band Blockers (1/2) 2 f RF 2095 MHz 2050 MHz 2025 MHz -96 dBm -44 dBm -30 dBm -15 dBm BW 3.8MkHz WCDMA Out-of-Band Blockers Noise Floor=-108 dBm RX Band:=2.11-2.17 GHz 2185 MHz 2230 MHz 2255 MHz -44 dBm -30 dBm -15 dBm P TX = +24dBm 1940 MHz @ANT 3 rd order intermodulation between TX signal and out-of- band blocker dictates RX IIP3 spec TX signal at 1940MHz and RX out-of-band blocker at 2025MHz IM3 at (2*2025-1940)= 2110 MHz (RX in-band)
WCDMA TX Leakage and Out-of-Band Blockers (2/2) 3 LNA PA 2025 1940 @ANT P TX = 24dBm P RXB = -15dBm 2110 P RX = -96dBm 2025 1940 @LNA Ainput P TX = -20dBm P RXB = -44dBm 2110 P RX = -98dBm 2025 1940 @RX Output Referred to LNA Input 2110 1855 IM3 Noise Floor IM3 product needs to be 10 dB below noise floor = -118dBm IM3 (2f 2 -f 1 )= 2P 2 +P 1 -2IIP3 IIP3=0.5*(+118+2*(-44) -20)= +5 dBm

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
GSM Blockers and Phase Noise (1/3) GSM Blocker Test: Minimum detectable signal =-99 dBm SNRmin = 9dB Noise Floor = -108 dBm 4 f RF -600 kHz -1.6

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 6

Lect25_RF Transceivers Case Studies II - ECE 620...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online