May 2000 doc IEEE 802 15 00220 r

May 2000 doc. : IEEE 802. 15 -00/220 r 0 IEEE P 802. 15 Working Group for Wireless Personal Area Networks. TM Physical Layer Model of the Impact of Bluetooth on IEEE 802. 11 b Submission 1 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Physical Layer Simulation Model For Impact of Bluetooth Interferer on 11 Mbps 802. 11 Receiver · Bluetooth interferer modeled as tone jammer · Performance of 802. 11 Receiver depends on the following: – Signal to Interference Ratio (SIR) – Signal to Background Noise Ratio – Frequency of Bluetooth Interferer – Multipath Structure – Receiver Processing Submission 2 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Processing Options • Basic Processing (BP) • BP + MF – Matched Filter (MF) for collecting multipath energy • BP + MF + EQ – Equalizer (EQ) to correct for Intersymbol Interference (ISI) Submission 3 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Tapped Delay Line Channel Model • Channel Impulse Response Submission 4 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Channel Matched Filter Channel D-QPSK Submission Pick Largest 5 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Communication System Analysis Submission 6 Peter J. Voltz, Polytechnic University

July 2000 Submission doc. : IEEE 802. 15 -00/220 r 0 7 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Output of Receiver due to 802. 11 input Where Submission 8 Peter J. Voltz, Polytechnic University

July 2000 Note that if doc. : IEEE 802. 15 -00/220 r 0 is time limited to and the channel is clear, then Seconds, and Which is the cross correlation between the receivers reference codeword and the particular codeword being received, times the phase factor which carries 2 bits. When a multipath channel is present, the non-zero values of for cause intersymbol interference. Submission 9 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Response to Interference Frequency offset, Submission , has two effects 10 Peter J. Voltz, Polytechnic University

July 2000 1. doc. : IEEE 802. 15 -00/220 r 0 Effective amplitude of interferer is multiplied by. 2. The discrete sine wave, , is correlated with the 64 CCK codewords and contributes to outputs. Submission 11 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Simulation Results for three sample channels. Bluetooth Interferer at 802. 11 Band Center. Eb/No = 20 d. B for white noise. Submission 12 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Effect of frequency offset due to digital sine wave correlation effect Submission 13 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Effect of frequency offset due to digital sine wave correlation effect Submission 14 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Effect of frequency offset due to digital sine wave correlation effect Submission 15 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Conclusions • We have modeled the 802. 11 b Receiver except for the Equalizer. • Without the equalizer the effect of interference is heavily dependent on the actual channel model. – At 10 -4 the SIR varies from about 6 d. B to about 18 d. B Submission 16 Peter J. Voltz, Polytechnic University

July 2000 doc. : IEEE 802. 15 -00/220 r 0 Next Steps • Add the Equalizer into the model • See if the variation due to the channel is reduced • Develop a formula for the Symbol Error Rate (SER) as a function of SIR. • Feed that (SER) formula into the MAC model. Submission 17 Peter J. Voltz, Polytechnic University