1. IEEE P802.22 Wireless RANs Date: 2007-05-16
March 2007
doc.: IEEE yy/xxxxr0
May 2007
Advanced FEC Results
IEEE P Wireless RANs Date:
Authors:
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John Benko, Orange Labs
Patrick Pirat, France Telecom

2. Simulation environment for synching
March 2007
doc.: IEEE yy/xxxxr0
May 2007
Simulation environment for synching
Downlink
FFT size : 2048
Guard sub-carriers: 184 on the left side, 183 on the right side
DC sub-carrier: 1
Pilots: 240
Data sub-carriers: 1440
Sub-channel size: 24 data symbols
Coded Block size: 576
Channel coding: Convolutional as in working document 0.1
Channel model: AWGN and Profile B
Tail-biting encoding, Classical Viterbi Decoding
Further details described in document
John Benko, Orange Labs
Patrick Pirat, France Telecom

3. Stage 1: Simulation results match! Convolutional Code, R=1/2 QPSK
March 2007
doc.: IEEE yy/xxxxr0
May 2007
Stage 1: Simulation results match! Convolutional Code, R=1/2 QPSK
John Benko, Orange Labs
Patrick Pirat, France Telecom

4. Stage 2:Advanced Coding Simulations
March 2007
doc.: IEEE yy/xxxxr0
May 2007
Stage 2:Advanced Coding Simulations
Most simulations are of different block sizes! -Spent a lot of time agreeing how to simulate WRAN channel B Only agreed on sim/ block sizes last week: a) 384 coded bits, with QPSK R=1/2, Channel B, DS Frequency spreading the coded blocks in frequency (not time) b) 1728 coded bits, with 64-QAM R=3/4, Channel B, US Spreading the coded blocks in time (over 12 symbols) Only one company submitted these results!
John Benko, Orange Labs
Patrick Pirat, France Telecom

5. Simulation results from I2R (I)
March 2007
doc.: IEEE yy/xxxxr0
May 2007
Simulation results from I2R (I)
16-QAM
Rate =1/2
Coded Block Size: 288bits
# of test positions: 6
# of iterations:
John Benko, Orange Labs
Patrick Pirat, France Telecom

6. Simulation results of I2R (II)
March 2007
doc.: IEEE yy/xxxxr0
May 2007
Simulation results of I2R (II)
64-QAM
Rate = 1/2
Coded Block Size: 288bits
# of test positions: 6
# of iterations:
John Benko, Orange Labs
Patrick Pirat, France Telecom

7. CTC vs LDPC May 2007 AWGN, R=1/2, QPSK
March 2007
doc.: IEEE yy/xxxxr0
May 2007
CTC vs LDPC
AWGN, R=1/2, QPSK
Duo-Binary TC, 8 iterations, Max-Log-MAP decoding
IEEE e structured LDPC, BP decoding, 50 iterations
N=576 and 2304 (coded blocksize)
John Benko, Orange Labs
Patrick Pirat, France Telecom

8. May 2007 March 2007 doc.: IEEE 802.22-yy/xxxxr0
John Benko, Orange Labs
Patrick Pirat, France Telecom