Doc.: IEEE 802.15-00/136r0 Submission May 2000 Maurice Schiff, ElanixSlide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

May 2000

Maurice Schiff, ElanixSlide 1

doc.: IEEE 802.15-00/136r0

Submission

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

Submission Title: [ Interference/Coexistence of WLAN/WPANs via SystemView]Date Submitted : [ 9 May 2000]Source: [Maurice Schiff] Company: [Elanix, Inc.] and [Michael Dydyk] Company: [Motorola Inc.]Address: [5655 Lindero Canyon Rd. ,Suite 721, Wetlake Village, CA, 91362] [8220 E. Roosvelt St., Scottsdale, AZ, 85257]Voice:[818-597-1414], FAX: [818-597-1427]< E-Mail [[email protected]] [480-441-2074], FAX: [480-441-0830]< E-Mail [[email protected]]Re: [N/A]

Abstract: [This presentation describes a PC based simulation engine that can be used to investigatemany aspects of the WLAN/WPAN PHY layer performance, including BER performance, effects ofother user interference, etc.]

Purpose:[ To provide WLAN/WPAN developers a means for rapidly and accurately investigating theirsystem designs.]

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

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doc.: IEEE 802.15-00/136r0

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Agenda

• Introduction• Overview of SystemView• Bluetooth Model• Interferor Models

– Frequency Hoping Spread Spectrum– Direct Sequence Spread Spectrum

• Results of Simulation• Conclusions

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doc.: IEEE 802.15-00/136r0

Submission

What is SystemView?

• The rapid prototyping tool for system design engineers that want to: – Implement a design with minimum effort– Perform trade studies– Analyze Results

AND– Migrate to Hardware

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SystemView Overview

• Perform Bit-True, Multi-rate, and Mix-Mode simulations in an efficient manner.

• PC Based Software Simulation Tool– Block diagram editor with Application Specific

libraries.• And a “Virtual Work Bench” that offers all the

functions of “Real World” laboratory equipment.

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Key SystemView Benefits

• Simulate all types of modulation• Add any number of interferers with arbitrary modulation

and power levels• Peform complete parameter (BER) studies in a

single run• End to end simulations includeing rf and DSP

portions of the design (mixed mode)• Easy-to-learn and Ease-of-use

– Be productive rapidly– Develop and modify sophisticated user models

quickly

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Block Diagram Editor

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Time Specification Form

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Typical Analysis Displays

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SystemView Filter Design

• Filter Design is Included in Basic SystemView– An extensive filter design window to

generate• FIR Filters• IIR Filters• Communications Filters• Custom Filters• DSP bit true mode

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Filter Design

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Global Parameter Form

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802.11 DSSS With Interference

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802.11 Spectra

SystemView

0

0

10e+6

10e+6

20e+6

20e+6

30e+6

30e+6

40e+6

40e+6

50e+6

50e+6

60e+6

60e+6

-140

-120

-100

Powe

r dBm

Frequency in Hz (dF = 32.23e+3 Hz)

Power Spectrum of Sink 33 (dBm 50 ohms)

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Overlay of DSSS and Interference Spectra

SystemView

0

0

25e+6

25e+6

50e+6

50e+6

75e+6

75e+6

100e+6

100e+6

125e+6

125e+6

-140

-120

-100

-80I n t e r f e r e n c e

D e s i r e d S i g n a l

Pow

er d

Bm

Frequency in Hz (dF = 4.028e+3 Hz)

SIGNAL SPECTUA

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DSSS Eye DiagramSystemView

0

0

20.e-9

20.e-9

40.e-9

40.e-9

60.e-9

60.e-9

80.e-9

80.e-9

100.e-9

100.e-9

120.e-9

120.e-9

140.e-9

140.e-9

160.e-9

160.e-9

-50.e-6

0

50.e-6

Ampl

itude

Time in Seconds

Eye Diagram

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Bluetooth Model with DSSS Interference

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Effect of DSSS Interferer on Bluetooth Performance

SystemView

-100

-100

-98

-98

-96

-96

-94

-94

-92

-92

-90

-90

-88

-88

-86

-86

1.00e-2

1.00e-1B l u e t o o t h B E R v s P w r

w i t h D S S S I n t e r f e r e n c e

BER

Received Power dBm

BER vs Power

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Bluetooth Model With FH Interference

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Effect of FH Interferer on Bluetooth Performance

SystemView

-100

-100

-98

-98

-96

-96

-94

-94

-92

-92

-90

-90

-88

-88

-86

-86

8.00e-3 9.00e-3 1.00e-2 1.00e-2

2.00e-2

3.00e-2

4.00e-2

5.00e-2

6.00e-2 7.00e-2 8.00e-2 9.00e-2 1.00e-1 1.00e-1

2.00e-1

3.00e-1

4.00e-1

B E R v s R c v d P o w e r

w i t h F H I n t e r f e r e n c e

BER

Power in dBm

BER vs SNR for w0

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GSM Receiver Design

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SystemView Optional Libraries

DSPLibrary

LogicLibrary

CommunicationsLibrary

Adaptive FilterLibrary

RF/AnalogLibrary

CDMA/PCSLibrary

User codeLibrary

DVBLibrary

M-Link

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Submission

Conclusions

• Impact on performance of WLAN/WPANs, as related to interference/coexistence, can be predicted apriory using existing simulation tool.

Documents

Doc.: IEEE 802.15-00/136r0 Submission May 2000 Maurice Schiff, ElanixSlide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)