RU Head: Rinaldo Castello

Danilo Manstretta, Flavio Avanzo, Daniele Mastantuono Flavio Avanzo, Daniele Mastantuono , Daniele Mastantuono

RU Head: Rinaldo Castello

Flavio Avanzo

Research Unit 3

Task 1.4: Advanced RF design

Task 1.4: Advanced RF Design 2/9

Motivation

•  Target: next generation cellular –  High data rate, adaptive, spectrally efficient modulations

 Linear power amplifiers

•  Flexible transmitter architectures

Task 1.4: Advanced RF Design 3/9

Wireless Systems Evolution

• Global roaming

• Multi-mode

• Adaptive QoS

• Low Cost

• Small form factor

• Low power

Task 1.4: Advanced RF Design 4/9

3G LongTermEvolution Targets •  Significantly increased peak data rates, scaled linearly

according to spectrum allocation –  Instantaneous downlink peak data rate of 100Mbit/s in a 20MHz downlink

spectrum (i.e. 5 bit/s/Hz) –  Instantaneous uplink peak data rate of 50Mbit/s in a 20MHz uplink spectrum (i.e.

2.5 bit/s/Hz)

•  Improved spectrum efficiency –  E-UTRA to operate in 1.25, 1.6, 2.5, 5, 10, 15 and 20 MHz allocations…hence

allowing different possibilities for re-farming already in use spectrum

•  Low terminal cost and power consumption

•  Co-existence –  with 3G on adjacent channels –  with other wireless systems –  Handover with 3GPP –  Handover with non 3GPP Technologies (CDMA 2000, WiFi, WiMAX)

Task 1.4: Advanced RF Design 5/9

TX Architectures

•  Cartesian I&Q modulation

•  Polar Transmitter

•  Outphasing Transmitter

Task 1.4: Advanced RF Design 6/9

System Requirements •  Why linear amplification is so inefficient?

Task 1.4: Advanced RF Design 7/9

Efficient Power Amplification

Task 1.4: Advanced RF Design 8/9

Efficient Power Amplification

•  Issues to be investigated: –  Auxiliary power-on –  Linearity

Task 1.4: Advanced RF Design 9/9

Research Activity Timetable