Alessandra Pipino – XXIX cycle Midterm Seminar Day - 31 st March 2015 System-level and circuital design of receivers for wireless communication applications Tutor: Prof. A. Baschirotto

Outline BLE System Design RF Filtering ADC Courses attended 31/03/20152A. PIPINO - Midterm Seminar Day

Outline BLE System Design RF Filtering ADC Course attended 31/03/20153A. PIPINO - Midterm Seminar Day

BLE Standard Purpose of the activity : Dimensioning of a receiver front-end compliant with the Bluetooth Low Energy standard communication In collaboration with : Department of Electrical & Computer Engineering of University of Toronto Hong Kong Applied Science and Technology Research Institute (ASTRI) 31/03/20154A. PIPINO - Midterm Seminar Day

BLE Standard Bluetooth Low Energy (BLE) is a new release of the conventional Bluetooth Lower power implementation  long battery life Lower complexity Lower cost Applications: Automotive Mobile phones Healthcare Security & proximity 31/03/20155A. PIPINO - Midterm Seminar Day

BLE Standard 2400 – MHz ISM band 40 channels with 2MHz-spacing 1MHz-channel bandwidth 1Mbps data rate GFSK modulation 31/03/20156A. PIPINO - Midterm Seminar Day

BLE Standard Two main sections in the standard document: MAC Layer : communication protocol  digital baseband Physical Layer : channel bandwidth, operative scenario, power, etc.  analog front-end 31/03/20157A. PIPINO - Midterm Seminar Day

Receiver design Physical layer section Specifications for the RX (Receiver) analog front-end 31/03/20158A. PIPINO - Midterm Seminar Day

Receiver design Information about RX : Actual Sensitivity Level Interference Performance Out-of-Band Blocking Intermodulation Characteristics Maximum Usable Level Reference Signal Definition 31/03/20159A. PIPINO - Midterm Seminar Day

Receiver design ParametersSpecs BER10 -3 SNR out,min [dB]12 Sensitivity [dBm]-80 Channel bandwidth [MHz]1 Noise Figure NF [dB]20 Noise Floor [dBm]-94 IIP3 [dBm]>-31 IIP2 [dBm]>-16 Filter order n2 SNDR [dB]24 ENOB4 Gain chain [dB]83 The algorithm has been reported in Excel All the specs derived automatically 31/03/201510A. PIPINO - Midterm Seminar Day

Receiver design ParametersLNA AC coupling Mixer Complex Filter Total specs Target specs Gain5mS-0.04dB2kΩ63dB82.3dB83dB NF [dB] IIP3 [dBm] IIP2 [dBm] The algorithm has been reported in Excel Also the specs distribution derived automatically (through the so-called “propagation rules”) : 31/03/201511A. PIPINO - Midterm Seminar Day

Receiver design Simulink simulation to verify the BLE system design derived through the algorithm 31/03/201512A. PIPINO - Midterm Seminar Day

Receiver design Simulink simulation: Two-tone test 31/03/201513A. PIPINO - Midterm Seminar Day

Papers A paper entitled “Bluetooth Low Energy Receiver Design” submitted and accepted as lecture presentation at 2015 IEEE International Symposium on Circuits and Systems (ISCAS) (24-27May 2015, Lisbon-Portugal) A paper entitled “A Simple Link Budget Computation for Wireless Receivers” submitted for publication on Journal on Circuits, Systems and Computers (JCSC) 31/03/201514A. PIPINO - Midterm Seminar Day

Outline BLE Standard RF Filtering ADC Courses attended 31/03/201515A. PIPINO - Midterm Seminar Day

RF Filtering ADC Purpose of the activity : Analysis and circuit design of a RF Filtering ADC  Direct RF-to-digital receiver In collaboration with : University of Pavia Marvell – Chip Design Center in Pavia 31/03/201516A. PIPINO - Midterm Seminar Day

Filtering ADC REDUCTION OF THE BILL OF MATERIAL (OFF CHIP) SUBSTITUTION OF ANALOG BLOCKS WITH DIGITAL ONES SOFTWARE DEFINED RADIO (SDR) Ultimate target: ANTENNA ADC 31/03/201517A. PIPINO - Midterm Seminar Day

Filtering ADC Traditional receiver architecture: CSF-ADC cascade Filtering ADC: CSF and ADC embedded in a single block 31/03/201518A. PIPINO - Midterm Seminar Day

Filtering ADC ΣΔ ADC: 31/03/201519A. PIPINO - Midterm Seminar Day QUANTIZATION NOISE SHAPING!

Filtering ADC Filtering ADC: The DSM incorporated inside the global feedback loop of the CSF  additional noise suppression (also analog)  interferers filtering 31/03/201520A. PIPINO - Midterm Seminar Day

Filtering ADC Advantages: Shaping of thermal and quantization noise [1] In-band thanks to both CSF and DSM in loop Out-of band thanks to ADC only [1] M. Andersson, et al. “A 9MHz Filtering ADC with Additinal 2 nd –order ΣΔ Modulator Noise Suppression” 31/03/201521A. PIPINO - Midterm Seminar Day

Filtering ADC What happens if also the mixer is embedded in the feedback loop? highly linear design! 31/03/201522A. PIPINO - Midterm Seminar Day

Filtering ADC Cadence model schematic Work in progress.. 31/03/201523A. PIPINO - Midterm Seminar Day

Outline BLE Standard RF Filtering ADC Courses attended 31/03/201524A. PIPINO - Midterm Seminar Day

Courses attended “23 rd Workshop on Advances in Analog Circuit Design” (AACD2014) - Lisbon (Portugal), 8-10 April 2014 (with exam) “Topics on Microelectronics”(TOM2014), Pavia (Italy), 6- 8 May & 3-5 September 2014 Linux-C-Python course held by prof. Biancini&Prete (with exam) 31/03/201525A. PIPINO - Midterm Seminar Day

Thank you for your attention! 31/03/2015A. PIPINO - Midterm Seminar Day26