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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [ Draft PHY Proposal for 60 GHz WPAN ] Date Submitted: [ 11 November, 2005 ] Source: [ Eckhard Grass, Maxim Piz, Frank Herzel, Rolf Kraemer ] Company [ IHP ]

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: [Draft PHY Proposal for 60 GHz WPAN]

Date Submitted: [11 November, 2005]

Source: [Eckhard Grass, Maxim Piz, Frank Herzel, Rolf Kraemer] Company [IHP]

Address [Im Technologiepark, Frankfurt (Oder), D-15236, Germany]

Voice:[+49 335 5625 731], FAX: [+49 335 5625 671], E-Mail:[[email protected]]

Re: []

Abstract: [Based on a simple channel model and link budget calculations, some PHY parameters for a 60 GHz OFDM WPAN are derived. The proposed PHY parameters support data rates up to 1 GBit/s and can be extended to 2 Gbit/s.]

Purpose: [This document is intended to serve as a basis for discussions for defining the IEEE802.15.3.c PHY parameters. Implementation aspects of 60 GHz RF circuits are presented]

Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.

Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

Eckhard Grass, IHP


Draft phy proposal for 60 ghz wpan

Draft PHY Proposal for 60 GHz WPAN Area Networks (WPANs)

Eckhard Grass, Maxim Piz, Frank Herzel and

Rolf Kraemer (IHP)

Eckhard Grass, IHP


Outline
Outline Area Networks (WPANs)

  • Introduction and application scenario

  • Linkbudget and phase noise calculation

  • Proposed PHY parameters for 60 GHz OFDM WPAN

  • Integrated receiver frontend for OFDM demonstrator in SiGe BiCMOS technology

  • Conclusions

  • Acknowledgements

Eckhard Grass, IHP


Goals
Goals Area Networks (WPANs)

  • Definition and development of suitable algorithms and implementation of a 60 GHz, 1 Gbit/s WLAN demonstrator including

    • Highly integrated analog frontend (AFE)

    • OFDM baseband processor (BB)

    • Medium Access Control Processor (MAC)

  • Features:

    • 60 GHz frequency band

    • >= 1 Gbit/s net transmission rate

    • High spectral efficiency (> 2.5 Bit/s/Hz)

    • Low cost (Si-based circuits)

    • Demonstrator flexibility (standard interfaces, FPGA, m-Controler)

    • Protocol with QoS support

Eckhard Grass, IHP


60 ghz wpan application scenario
60 GHz WPAN Application Scenario Area Networks (WPANs)

  • Indoor home and office scenario (Wireless Gbit Ethernet)

  • Fast video download (Wireless USB-Stick)

  • Media supply in public areas (trains, busses, etc.)

AP

AP

Eckhard Grass, IHP


Simplified link budget calculation
Simplified Link Budget Calculation Area Networks (WPANs)

Assumptions:

  • SNRmin = 20 dB for 16-QAM-1/2 (source rate = 480 Mbit/s, implementation loss = 2 dB + 1 dB (phase noise degradation))

  • Receiver noise figure: NF = 10 dB

  • Transmit power: Ps = 10 dBm (P1dB = 16 dBm, Backoff = 6 dB)

  • Use of Vivaldi Antennas with GTX = GRX = 7 dB (3 dB misalignment)

Sensitivity:

Maximum range for 16-QAM-1/2:

Eckhard Grass, IHP


Small scale channel measurement
Small-Scale Channel Measurement Area Networks (WPANs)

FhG-HHI-Berlin

Eckhard Grass, IHP


Small scale pdps toa parameters
Small-Scale PDPs, TOA Parameters Area Networks (WPANs)

Eckhard Grass, IHP


Delay spread
Delay Spread Area Networks (WPANs)

Delay spread measurements done by Akeyama, NTT for 802.15.3c: “Study on mm wave propagation characteristics to realize WPAN” (for antennas with directivity in office scenario)=> Delay spread less than 20 ns => Guard interval of 160 ns sufficient

NLOS

LOS

Eckhard Grass, IHP


Phase noise modeling and effects

RMS phase error after CPE correction, simulated Area Networks (WPANs)

z

=0.5, L

=-90dBc/Hz @1MHz

z

=0.5, L

=-90dBc/Hz @1MHz

VCO

VCO

2

20

solid: second-order model

solid: second-order model

0

dashed: first-order model

dashed: first-order model

15

]

R

L

@ 100 kHz= -120 dBc/Hz

-2

REF

E

B

RMS phase error (degree)

10

[

-4

-130 dBc/Hz

g

L

@ 100 kHz= -120 dBc/Hz

o

REF

l

-130 dBc/Hz

-6

5

-140 dBc/Hz

-140 dBc/Hz

-8

0

1

2

3

4

5

6

1

2

3

4

5

6

loop bandwidth [MHz]

loop bandwidth [MHz]

Phase Noise Modeling and Effects

  • Simulation of uncoded 16-QAM OFDM system with

    • 192 data sub-carriers, 16 pilot sub-carriers

    • CPE correction included

  • Results:

    • Optimum bandwidth depends on crystal phase noise

    • < 3 degree rms phase error required for low BER (16-QAM)

Eckhard Grass, IHP


Ofdm symbol length
OFDM Symbol Length Area Networks (WPANs)

  • Bandwidth tradeoff between reference noise and VCO noise

  • Low bandwidth (10-100 kHz) desirable to suppress filter noise and charge pump noise

  • Short symbols (<1μs) mandatory for rms phase error below 3 degree

RMS phase error after correction of common phase error as a function of PLL bandwidth for three symbol lengths.

Eckhard Grass, IHP


Proposed phy parameters and data rates
Proposed Area Networks (WPANs) PHY Parameters and Data Rates

Turbo mode with doubled subcarrier spacing possible

=> data rates up to 2 Gbit/s

Eckhard Grass, IHP


Pilot data and zero subcarriers
Pilot, Data and Zero Subcarriers Area Networks (WPANs)

Modulation bandwidth = 320 MHz

Number of data subcarriers = 192

Number of pilot subcarriers = 16

Symbol time = 800 ns

Guard time = 160 ns = 1/5 symbol time

Subcarrier spacing = 1.5625 MHz

Eckhard Grass, IHP


Allocation of bandwidth to user groups
Allocation of Bandwidth to ‚User Groups‘ Area Networks (WPANs)

57 GHz

58 GHz

61 GHz

63 GHz

64 GHz

  • Three main frequency sub-bands:

  • End User,

  • Fixed Networks,

  • Emergency

Allocated to fixed installations (Wire replacement, Train, Bus...)

Allocated to end user

(Commodity products, Mobile,...)

Emergency (like 11.p)

57 GHz

64 GHz

4 GHz

8x500 MHz channels

2 GHz

4x500 MHz channels

1 GHz

2x500 MHz channels

Eckhard Grass, IHP


60 ghz lna and mixer in sige bicmos

5 Area Networks (WPANs)

35

0

30

25

-5

20

IF output (dBm)

-10

15

Conversion gain (dB)

-15

1 dB compression

10

-20

point –1.6

dBm

5

-25

0

-48

-46

-44

-42

-40

-38

-36

-34

-32

-30

-28

-26

52

54

56

58

60

62

64

66

68

70

RF input (dBm)

Frequency (GHz)

60 GHz LNA and Mixer in SiGe BiCMOS

  • 60 GHz RF Frontend Results:

  • Chip area: 1.1 mm x 0.8 mm

  • 1 dB compression point: -1.6 dBm (out)

  • Conversion gain: 28 dB

  • In-band gain ripple (57-64 GHz): < 1 dB

IF=5 GHz

Eckhard Grass, IHP


60 ghz receiver frontend in fabrication
60 GHz Receiver Frontend (in Fabrication) Area Networks (WPANs)

  • High-Speed SiGe:C BiCMOS Technology ft/fmax = 200 GHz

  • Down-converter (LNA + mixer) and frequency synthesizer on one chip

  • Area < 2mm2

RF 61-61.5 GHz

IF 5.25 GHz

56 GHzPLL

Crystal 109 MHz

Eckhard Grass, IHP


Receiver board layout
Receiver Board Layout Area Networks (WPANs)

Board material:Rogers 3003 (5 mil) on FR4

Chip connection: Ribbon bonding / wire bonding

On-board antenna: Single-ended, Vivaldi type, Microstrip connection

Vivaldi Antenna

60 GHz RXChip

Crystal

reference

109.375 MHz(56 GHz/512)

IFn

IFp

Eckhard Grass, IHP


Conclusions
Conclusions Area Networks (WPANs)

  • 60 GHz systems can support massive data rates; 7 GHz of unlicensed bandwidth available

    • Oxygen attenuation and attenuation through walls facilitates efficient frequency re-use

    • Creating multiple data streams using MIMO techniques is not a useful option;

    • However, beamforming can significantly improve the link-budget

  • SiGe BiCMOS efficient technology for 60 GHz band

    • 60 GHz frequency synthesizer and RF receiver frontend (LNA + Mixer) were successfully implemented in SiGe BiCMOS technology and tested

    • A complete transceiver was designed and is being fabricated

    • Small wavelength allows on-chip antenna and small form factor

Eckhard Grass, IHP


Acknowledgements
Acknowledgements Area Networks (WPANs)

  • BMBF (Federal Ministry of Education and Research – Germany) for funding the WIGWAM Project (http://www.wigwam-project.com/)

  • WIGWAM Team at IHP: Jean-Pierre Ebert, Klaus Schmalz, Yaoming Sun, Srdjan Glisic, Milos Krstic, Klaus Tittelbach, Wolfgang Winkler

  • WIGWAM IHP Subcontractors: Karin Schuler, Werner Wiesbeck (Uni Karlsruhe), Wilhelm Keusgen, Michael Peter (FhG-HHI Berlin)

  • WIGWAM Consortium - in Particular Project Coordinators:Gerhard Fettweis, Ralf Irmer and Peter Zillmann (TU Dresden)(http://www.wigwam-project.com/)

Eckhard Grass, IHP


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