1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Simulation and Analysis of Physical Layer Coexistence
Date Submitted: 19 September 2000
Source: Robert E. Van Dyck Company: National Institute of Standards and Technology
Address: 100 Bureau Drive, Mail Stop 8920, Gaithersburg, Maryland, U.S.A.
Voice: , FAX: ,
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Abstract: Simulation results are presented for the GFSK modulation used in IEEE Baseband simulations of the transmitter, Gaussian and fading channels, and the receiver are described. The effects of co-channel interference are quantified.
Purpose: The information in this document should be used to further TG 2 coexistence studies.
Notice: This document has been prepared to assist the IEEE P 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 P

2. Simulations and Analysis of Physical Layer Coexistence
Robert E. Van Dyck & Amir Soltanian
National Institute of Standards
and Technology
Gaithersburg, Maryland
September 2000

3. doc.: IEEE 802.15-<doc#>
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doc.: IEEE <doc#>
Simulations
Two Channel Models
Additive White Gaussian Noise
Rician Slow Flat Fading Channel
Signal processing-based implementations
Gaussian Frequency Shift Keying
Transmitter and Receiver
8 samples/symbol -> 8 million-samples/sec
Baseband Model
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4. Limiter-Discriminator Detection
Non-coherent detection
Simple receiver model
No phase tracking necessary
Implement differentiators using
6 tap finite impulse response digital filters
Performance essentially equivalent
to 1 bit differential detection

5. Baseband Model of GFSK

6. Receiver IF Filter (Baseband Equivalent)

7. Receiver IF Filter

8. Receiver IF Filter

9. Bit Error Rate of GMSK in AWGN Channel
BT = 0.5
Br = 1.1

10. Bit Error Rate of GFSK in AWGN Channel
BT = 0.5
Br = 1.1

11. Baseband Model of 802.15.1 with a Rician Channel

12. Bit Error Rate of GFSK in Rician Channel
BT = 0.5
Br = 1.1

13. Interference Model

14. Bit Error Rate with Co-channel Interference
AWGN

15. Bit Error Rate with Co-channel Interference
AWGN

16. Co-channel Interference for Fading Channels

17. Bit Error Rate with Co-channel Interference
Flat Fading

18. References
R. F. Pawula, “On the theory of error rates for narrow-band digital FM,” IEEE Trans. on Comm., pp , Nov
R. F. Pawula, S. O. Rice, and J. H. Roberts, “Distribution of the phase angle between two vectors perturbed by Gaussian noise,” IEEE Trans. on Comm., pp , Aug

19. References
M. K. Simon and C. C. Wang, “Differential vs. limiter-discriminator detection of narrow-band FM,” IEEE Trans. on Comm, pp , Nov
M. K. Simon and C. C. Wang, “Differential detection of Gaussian MSK in a mobile radio environment,” IEEE Trans. On Vehic. Tech., pp , Nov
P. Varshney and S. Kumar, “Performance of GMSK in a land mobile radio channel,” IEEE Trans. on Vehic. Tech., pp , Aug. 1991

20. References
M. Chiani, “Performance of BPSK and GMSK with multiple cochannel interferers,” IEEE Int. Symp. on PIMRC, pp , 1996.
Y. T. Su, W.-C. Kao, and J. S. Li, “The effects of Rician fading and multiple CCI on differentially detected GMSK signals,” IEEE Int. Symp. on PIMRC, pp , 1997.
T. Ekvetchavit and Z. Zvonar, “Performance of Phase-locked loop receiver in digital FM systems,” IEEE Int. Symp. on PIMRC , pp , 1998.