1. Higher Rate 802.11b: Double the Data Rate
May 2000
Higher Rate b: Double the Data Rate
Chris Heegard
Matthew Shoemake
&
Sid Schrum
Alantro Communications
141 Stony Circle
(707)
May 8, 2000
C. Heegard, et. al., Alantro Communications

2. Double the Data Rate Additive White Gaussian Noise
Month 1998
doc.: IEEE /xxx
May 2000
Double the Data Rate
PBCC/AC
Additive White Gaussian Noise
The PBCC FEC has a “3db” coding gain advantage
Multipath Distortion
A “joint equalizer/decoder” can process much more distortion
Uses trellis structure 25
CCK/Barker
22 Mbps 20 15
Data Rate, Mbps
11 Mbps 10
5.5 Mbps 5
2 Mbps
Noise, Multipath Distortion
C. Heegard, et. al., Alantro Communications
John Doe, His Company

3. Objectives Offer “double the data rate” in the same environment
May 2000
Objectives
Offer “double the data rate” in the same environment
Interoperate with existing IEEE802.11b standard
Same Spectrum
Same Radio
C. Heegard, et. al., Alantro Communications

4. Bit Error Rate in AWGN Comparison of standard rates
May 2000
Bit Error Rate in AWGN
Comparison of standard rates
BER versus Channel SNR
5.5-CCK
2-Barker
11-CCK
5.5-PBCC
11-PBCC
22-AC
C. Heegard, et. al., Alantro Communications

5. Coding Gain in AWGN Comparison of standard rates
May 2000
Coding Gain in AWGN
Comparison of standard rates
BER versus Normalized SNR
22-AC
CCK
PBCC
C. Heegard, et. al., Alantro Communications

6. Packet Error Rate in AWGN
May 2000
Packet Error Rate in AWGN
Comparison of standard rates
PER versus Channel SNR
C. Heegard, et. al., Alantro Communications

7. Coding Gain in AWGN Comparison of standard rates
May 2000
Coding Gain in AWGN
Comparison of standard rates
PER versus Normalized SNR
C. Heegard, et. al., Alantro Communications