Battery-free 802.15.4 Receiver Carlos Prez-Penichet, Claro Noda, - - PowerPoint PPT Presentation

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Battery-free 802.15.4 Receiver Carlos Prez-Penichet, Claro Noda, - - PowerPoint PPT Presentation

Jan 09, 2023 113 likes •754 views

Battery-free 802.15.4 Receiver Carlos Prez-Penichet, Claro Noda, Ambuj Varshney, Thiemo Voigt Backscattering Commodity Wireless Protocols Bluetooth Wi-Fi 802.15.4 3 4 5 6 6 Backscattering Commodity Wireless Protocols Bluetooth Wi-Fi

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SLIDE 1

Battery-free 802.15.4 Receiver

Carlos Pérez-Penichet, Claro Noda, Ambuj Varshney, Thiemo Voigt

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SLIDE 2

Backscattering Commodity Wireless Protocols

Bluetooth Wi-Fi 802.15.4

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SLIDE 3

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SLIDE 4

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SLIDE 5

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SLIDE 6

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SLIDE 7

Backscattering Commodity Wireless Protocols

Bluetooth Wi-Fi 802.15.4

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SLIDE 8

Packet Level Modulation Interpreter Device

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SLIDE 9

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SLIDE 10

Typical Receiver

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF 10

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SLIDE 11

Typical Receiver

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF 10

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SLIDE 12

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 13

802.15.4 Signal

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 14

802.15.4 Signal

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 15

802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 16

BPF

MIXER 802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 17

BPF

MIXER 802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 18

BPF

IF AMP MIXER 802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 19

The 802.15.4 Signal

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SLIDE 20

The 802.15.4 Signal

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SLIDE 21

The 802.15.4 Signal

fc f fc fc + f

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SLIDE 22

BPF

IF AMP MIXER 802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 23

BPF

IF AMP SLOPE DETECTOR MIXER 802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 24

Slope Detector

f 1 4Tc f f + 1 4Tc

Frequency

25 20 15 10 5

Filter Output gain [dB]

Filter transfer function

0.0 2.5 5.0 7.5 10.0 12.5 15.0

time [ s] Amplitude

Slope detector signals

Filter output Envelope

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SLIDE 25

BPF

IF AMP SLOPE DETECTOR MIXER 802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 26 +
  • BPF

IF AMP SLOPE DETECTOR MIXER COMPARATOR 802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 27 +
  • DBP

BPF

IF AMP SLOPE DETECTOR MIXER COMPARATOR 802.15.4 Signal External Carrier

BPF LNA RF LO LPF

0° 90°

ADC ADC

Digital Demod

LPF

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SLIDE 28 +
  • DBP

BPF

IF AMP SLOPE DETECTOR MIXER COMPARATOR 802.15.4 Signal External Carrier

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SLIDE 29

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SLIDE 30

Evaluation

Power Range Integration

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SLIDE 31

Power Consumption

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SLIDE 32

Power Consumption

66µW

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SLIDE 33

Power Consumption

75µW

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SLIDE 34

Power Consumption

190µW

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SLIDE 35

Power Consumption

30µW

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SLIDE 36

361µW

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SLIDE 37

Range

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SLIDE 38

Range

25 50 75 100 125 150 175 200 0.0 0.5 1.0

PRR

D=200cm

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SLIDE 39

Range

25 50 75 100 125 150 175 200 0.0 0.5 1.0

PRR

D=200cm 50 100 150 200 250 300 0.0 0.5 1.0

PRR

D=300cm

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SLIDE 40

Range

25 50 75 100 125 150 175 200 0.0 0.5 1.0

PRR

D=200cm 50 100 150 200 250 300 0.0 0.5 1.0

PRR

D=300cm 100 200 300 400 500

d [cm]

0.0 0.5 1.0

PRR

D=500cm

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SLIDE 41

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SLIDE 42

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SLIDE 43

TSCH

ACK Rx

Tx Rx

Frame Tx ACK Tx Frame Rx Guard Guard CCA

A->B B->C C->D A->B B->C C->D

Time Offset Channel Offset

Timeslot Slotframe

Simon Duquennoy et al. TSCH and 6tisch for Contiki: Challenges, Design and Evaluation. IEEE DCOS 2017

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SLIDE 44

TSCH Integration

TX RX RX TX RX CG Interrogator Tag Carrier Generator 1 2 3 4

Slot Number

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SLIDE 45

TSCH Integration

TX RX RX TX RX CG Interrogator Tag Carrier Generator 1 2 3 4

Slot Number

Carrier request 24

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SLIDE 46

TSCH Integration

TX RX RX TX RX CG Interrogator Tag Carrier Generator 1 2 3 4

Slot Number

Carrier request

Carrier

Data request 24

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SLIDE 47

TSCH Integration

TX RX RX TX RX CG Interrogator Tag Carrier Generator 1 2 3 4

Slot Number

Carrier request

Carrier

Data request

Carrier Carrier

Data transmission 24

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SLIDE 48

TSCH Integration

TX RX RX TX RX CG Interrogator Tag Carrier Generator 1 2 3 4

Slot Number

Carrier request

Carrier

Data request

Carrier Carrier

Data transmission 24

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SLIDE 49

TSCH Long-Term Reliability

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SLIDE 50 +
  • DBP

BPF

IF AMP SLOPE DETECTOR MIXER COMPARATOR 802.15.4 Signal External Carrier

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SLIDE 51

TSCH Integration

TX RX RX TX RX CG Interrogator Tag Carrier Generator 1 2 3 4

Slot Number

Carrier request

Carrier

Data request

Carrier Carrier

Data transmission 27

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SLIDE 52

361µW

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SLIDE 53

Thank you

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SLIDE 54

RFID

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SLIDE 55

A Low Power 2.4 GHz Superheterodyne Receiver Architecture. . .

  • J. F. Ensworth et al. In IEEE RFID, 2017

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SLIDE 56

Comparator

0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0

Amplitude

Baseband Threshold 0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0

time [ s]

1

0 0 0 0 1 1 1 0 1 1 1 1 0 1 0 1 1 1 0 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 0 0 1 1 1 0

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SLIDE 57

Mixer Conversion Gain vs. Input Signal Strength

70 60 50 40 30 20 10

RF Input Power [dBm]

80 70 60 50 40 30 20 10

Conversion Gain [dB]

CG power=4 dBm CG power=-3 dBm CG power=-12 dBm CG power=-32 dBm CG power=-53 dBm CG power=-63 dBm

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SLIDE 58

PRR vs. Input Power

50 45 40 35

TX power [dBm]

0.90 0.92 0.94 0.96 0.98 1.00

PRR

CG power=-14 dBm CG power=-18 dBm CG power=-22 dBm CG power=-27 dBm

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SLIDE 59

Sensitivity over 802.15.4 Channels

10 12 14 16 18 20 22 24 26 28

Channel

70 65 60 55 50 45 40 35 30

Sensitivity [dBm] 35

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SLIDE 60

PRR vs. IF Amplifier Gain

100 200 300 400 500 600 700 800

D [cm]

0.0 0.2 0.4 0.6 0.8 1.0

PRR

G=48dB G=60dB G=68dB G=88dB

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SLIDE 61

Channel Rejection Ratio

2 1 1 2

Channel Offset

5 10 15 20 25 30

Rejection Ratio [dB]

24 20 14 22

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SLIDE 62

CC2538 Receiver Filter Attenuation

15 10 5 5 10 15

Carrier offset [MHz]

80 60 40 20

Gain [dB] 38

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SLIDE 63

Glossy Integration

Initiator Repeater Receiver 1 2 3 4 5 6 7

Slot Number

TX RX TX RX TX RX TX RX TX RX TX RX

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