throbber
September 2004
`
`doc.: IEEE 802.11-04/1014r2
`
`Partial Proposal for 802.11n: ITRI
`Preamble Specification
`
`Yung-Yih Jian, Pangan Ting, Wei-Ping Chuang, Chun-Chun Kuo, Chang-Lung Hsiao
`Industrial Technology Research Institute (ITRI)
`Computer and Communications Research Laboratories (CCL)
`Bldg.14, 195 Sec. 4, Chung Hsing Rd. Chutung, Hsinchu, Taiwan 310, R.O.C
`Phone : +886-3-5914707
`Fax : +886-3-5820371
`e-Mail: {yyjian, pating, joeChuang, godeman, clhsiao}@itri.org.tw
`
`Wei-De Wu
`National Tsing Hua University
`Institute of Communications Engineering
`welder@micro.ee.nthu.edu.tw
`
`Chih-Kai Chen
`Stanford University
`Department of Electrical Engineering
`chihkai@stanford.edu
`Slide 1
`
`Submission
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 1 of 28
`
`

`

`doc.: IEEE 802.11-04/1014r2
`
`September 2004
`
`Outline
`– System block diagram
`– Proposed preamble structure
`– Short training symbol
`• Purpose of short training symbol
`• Construction of short training symbol
`• Numerical Results
`– Long training symbol
`• Purpose of long training symbol
`• Construction of long training symbol
`• Numerical Results
`– Conclusion
`
`Submission
`
`Slide 2
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 2 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`System block diagram ( 2 x 2 case )
`
`1x
`
`2x
`
`IFFT
`
`CP
`
`Remove
`CP
`
`FFT
`
`IFFT
`
`CP
`
`Remove
`CP
`
`FFT
`
`1y
`
`2y
`
`y
`
`
`2
`
`H x
`,j i
`
`
`i
`
`
`
`n
`
`,
`
`j
`
`j
`
`
`
`1, 2
`
`j
`
`i
`
`1
`
`
`Submission
`
`Slide 3
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 3 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`System block diagram ( 3 x 3 case )
`
`1x
`
`2x
`
`3x
`
`IFFT
`
`CP
`
`IFFT
`
`CP
`
`IFFT
`
`CP
`
`Remove
`CP
`
`Remove
`CP
`
`Remove
`CP
`
`FFT
`
`FFT
`
`FFT
`
`1y
`
`2y
`
`3y
`
`y
`
`
`3
`
`H x
`,j i
`
`
`i
`
`
`
`n
`
`,
`
`j
`
`j
`
`
`
`1, 2,3
`
`j
`
`i
`
`1
`
`
`Submission
`
`Slide 4
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 4 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`System block diagram ( 4 x 4 case )
`
`1x
`
`2x
`
`3x
`
`4x
`
`IFFT
`
`CP
`
`IFFT
`
`CP
`
`IFFT
`
`CP
`
`IFFT
`
`CP
`
`j
`
`y
`
`
`4
`
`i
`
`1
`
`
`Remove
`CP
`
`Remove
`CP
`
`Remove
`CP
`
`Remove
`CP
`
`FFT
`
`FFT
`
`FFT
`
`FFT
`
`1y
`
`2y
`
`3y
`
`4y
`
`H x
`,j i
`
`
`i
`
`
`
`n
`
`,
`
`j
`
`j
`
`
`
`1, 2,3, 4
`
`Submission
`
`Slide 5
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 5 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`Proposed Preamble Structure ( 2 x 2 case )
`
`Tx1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n LTS11
`
`802.11n LTS12
`
`Tx2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n LTS21
`
`802.11n LTS22
`
`MIMO frame detect,
`MIMO AGC
`
`Coarse freq. offset
`estimation, MIMO timing
`synchronization
`
`Channel estimation,
`fine frequency offset
`estimation
`
`Proposed Preamble Structure ( 3 x 3 case )
`
`Tx1
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n LTS31
`
`802.11n LTS32
`
`802.11n LTS33
`
`802.11n LTS34
`
`Tx2
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n LTS31
`
`802.11n LTS32
`
`802.11n LTS33
`
`802.11n LTS34
`
`Tx3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n LTS31
`
`802.11n LTS32
`
`802.11n LTS33
`
`802.11n LTS34
`
`MIMO frame detect,
`MIMO AGC
`
`Submission
`
`Coarse freq.
`offset estimation,
`MIMO timing
`synchronization
`
`Slide 6
`
`Channel estimation,
`fine frequency offset estimation
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 6 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`Proposed Preamble Structure ( 4 x 4 case )
`
`Tx1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n
`STS1
`
`802.11n LTS11
`
`802.11n LTS12
`
`802.11n LTS13
`
`802.11n LTS14
`
`Tx2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n
`STS2
`
`802.11n LTS21
`
`802.11n LTS22
`
`802.11n LTS23
`
`802.11n LTS24
`
`Tx3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n
`STS3
`
`802.11n LTS31
`
`802.11n LTS32
`
`802.11n LTS33
`
`802.11n LTS34
`
`Tx4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n
`STS4
`
`802.11n LTS41
`
`802.11n LTS42
`
`802.11n LTS43
`
`802.11n LTS44
`
`MIMO frame detect,
`MIMO AGC
`
`Coarse freq.
`offset estimation,
`MIMO timing
`synchronization
`
`Channel estimation,
`fine frequency offset estimation
`
`Overlapped preambles structure is proposed
`
`Lower overhead caused by preamble
`
`Submission
`
`Slide 7
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 7 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`
`Preamble Parameters
`
`Carrier Frequency
`
`Bandwidth
`
`Sample period
`
`FFT size
`
`Cyclic prefix
`
`STS Modulation / length
`
`LTS Modulation / length
`
`Number of TX antenna
`
`Antenna spacing
`
`Channel model
`
`5 GHz
`
`20 MHz
`
`50 ns
`
`64 (3.2 us)
`
`16 (0.8 us)
`
`QPSK / 32
`
`BPSK / 64
`
`2,3,4
`
`Half wavelength
`
`B,D,E
`
`Submission
`
`Slide 8
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 8 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`Short Training Symbol (STS)
`• Purposes of STS
`– Frame detection, AGC and Coarse frequency offset estimation
`– The new STSs from different Tx antenna have zero cross-
`correlation.
`– The preamble consists of several concatenated copies.
`• Backward compatibility
`– Assume there exists a protection mechanism similar to the case of
`11g and 11b.
`– We propose that the new STSs should not be detected by legacy
`systems.
`– The new STS should have the period longer than the legacy
`systems.
`
`Submission
`
`Slide 9
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 9 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`Backward Compatibility Consideration
`
`Received short training symbol:
`
`( )*
`
`X
`
`
`
`( )*( )*( )*
`
`
`
`X
`
`X
`
`X
`
`+
`
`tM
`
`),2(
`),1(
`),0(
`Conventional frame detection algorithm of 11a systems
`• Without considering channel and noise, the STSs of
`MIMO packet received by 11a system can be written as
` 
`( )s n
`
`
`( )s n
`Where Mt denotes the number of transmit antenna
`i
`• Low detection probability for 11a systems
`)(
`0
` n
`
`Find the STSs such that when received by 11a STA
`
`i
`
`1
`
`
`Submission
`
`Slide 10
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 10 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`Construction of Short Training Symbols
`• The properties of the proposed STSs
`– Period of 32 samples
`– Zero cross-correlation of the STSs
`– Low detection probability for 11a systems
`
`• The short training symbols are designed in frequency
`domain.
`• Time domain waveform of the ith STS is obtained by
`
`j
`
`2
`
`64
`
`nk
`
`
`
` )( ekS
`i
`
`63
`
`
`
`k
`
`0
`
`
`
` )(ns
`i
`
`
`
`1
`64
`
`Submission
`
`Slide 11
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 11 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`Proposed Short Training Symbol ( 3x3 case )
`
`S1,{-26,26} =
`{0, 0, 0, 0, 0, 0, -1-j, 0, 0, 0, 0, 0, 1+j, 0, 0, 0, 0, 0, 1+j, 0, 0, 0, 0, 0,
`)12/13(
`-1-j, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, 0}
`
`S2,{-26,26} =
`{ 0, 0, 1+j, 0, 0,0, 0, 0, 1+j, 0, 0, 0, 0, 0, -1–j, 0, 0, 0, 0, 0, 1+j, 0, 0, 0,
`)12/13(
`0, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, 1–j, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0 }
`
`S3,{-26,26} =
`{ 0, 0, 0, 0, -1-j, 0, 0, 0, 0, 0, 1+j, 0, 0, 0, 0, 0, -1-j, 0, 0, 0, 0, 0, -1-j,
`)12/13(
`0, 0, 0, 0, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, 1-j, 0, 0 }
`
`STS1
`STS2
`STS3
`
`PAPR(dB)
`
`6.57
`5.33
`5.33
`
`Submission
`
`Slide 12
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 12 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`Proposed Short Training Symbol ( 4x4 case )
`S1,{-26,26} =
`{ 0, 0, 0, 0, -1-j, 0, 0, 0, 0, 0, 0, 0, 1+j, 0, 0, 0, 0, 0, 0, 0, 1+j, 0, 0, 0, 0,
`)9/13(
`0, 0, 0, -1+j, 0, 0, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, 0, 0, 0 }
`
`S2,{-26,26} =
`{ 0, 0, 0, 0, 0, 0, -1-j, 0, 0, 0, 0, 0, 0, 0, -1-j, 0, 0, 0, 0, 0, 0, 0, -1-j, 0, 0,
`)9/13(
`0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0, 0, 0 }
`
`S3,{-26,26} =
`{ 0, 0, 0, 0, 0, 0, 0, 0, 1+j, 0, 0, 0, 0, 0, 0, 0, -1-j, 0, 0, 0, 0, 0, 0, 0, -1-j,
`)9/13(
`0, 0, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, 0, 0, -1+j, 0, 0, 0, 0 }
`
`S4,{-26,26} =
`{ 0, 0, 1+j, 0, 0, 0, 0, 0, 0, 0, 1+j, 0, 0, 0, 0, 0, 0, 0, 1+j, 0, 0, 0, 0, 0, 0,
`)9/13(
`0, 0, 0, 0, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, 0, 0, 1-j, 0, 0, 0, 0, 0, 0, 0,1-j, 0, 0 }
`
`STS1
`STS2
`STS3
`STS4
`
`PAPR(dB)
`4.2597
`5.2069
`4.2597
`4.7712
`
`Submission
`
`Slide 13
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 13 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`Proposed Time-Domain STS (1/2)
`
`Submission
`
`Slide 14
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 14 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`Proposed Time-Domain STS (2/2)
`
`Submission
`
`Slide 15
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 15 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`
`Numerical Results
`• Since the nonzero tones of the STSs are disjoint, the cross-
`correlation of each pair of STSs is 0.
`• Each STS has a period of 32 samples ( 1.6 us ) in time
`domain.
`
`Submission
`
`Slide 16
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 16 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`Frame Detection Scenarios (1/2)
`
`
`
`( )*( )*( )*
`
`
`
`Decision
`
`X
`
`X
`
`X
`
`+
`
`),0(
`
`),1(
`
`),2(
`
`Moving Average
`
`Threshold
`
`Received short training symbol:
`
`( )*
`
`X
`
`Conventional frame detection algorithm of 11a systems
`
`Submission
`
`Slide 17
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 17 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`Frame Detection Scenarios (2/2)
`
`Decision
`
`Submission
`
`Slide 18
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 18 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`
`Numerical Results
`
`The detection probability of the proposed
`STSs ( 3 x 3 mode ) in a 11a receiver over
`channel B,D and E which is tested over
`1000 channel realizations.
`Detected prob. over 1000 preambles and 31 IEEE 802.11n channels
`
`The detection probability of the proposed
`STSs ( 4 x 4 mode ) in a 11a receiver over
`channel B,D and E which is tested over
`1000 channel realizations.
`Detected prob. over 1000 preambles and 41 IEEE 802.11n channels
`
`11n Channel B
`11n Channel D
`11n Channel E
`
`6
`
`8
`
`10
`
`12
`
`SNR
`
`14
`
`16
`
`18
`
`20
`
`22
`
`11n Channel B
`11n Channel D
`11n Channel E
`
`6
`
`8
`
`10
`
`12
`
`SNR
`
`14
`
`16
`
`18
`
`20
`
`22
`
`0.4
`
`0.3
`
`0.2
`
`0.1
`
`0
`
`-0.1
`
`4
`
`0.4
`
`0.3
`
`0.2
`
`0.1
`
`0
`
`-0.1
`
`4
`
`Submission
`
`Slide 19
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 19 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`
`Numerical Results
`
`The detection probability of the proposed
`STSs ( 3 x 3 mode ) in a 11n receiver over
`channel B,D and E which is tested over
`1000 channel realizations.
`Detected prob. over 1000 preambles and 33 IEEE 802.11n channels
`
`11n Channel B
`11n Channel D
`11n Channel E
`
`The detection probability of the proposed
`STSs ( 4 x 4 mode ) in a 11n receiver over
`channel B,D and E which is tested over
`1000 channel realizations.
`Detected prob. over 1000 preambles and 44 IEEE 802.11n channels
`
`11n Channel B
`11n Channel D
`11n Channel E
`
`1
`
`0.98
`
`0.96
`
`0.94
`
`0.92
`
`0.9
`
`0.88
`
`6
`
`8
`
`10
`
`12
`
`SNR
`
`14
`
`16
`
`18
`
`20
`
`22
`
`0.86
`
`4
`
`6
`
`8
`
`10
`
`12
`
`14
`
`16
`
`18
`
`20
`
`22
`
`SNR
`
`1
`
`0.98
`
`0.96
`
`0.94
`
`0.92
`
`0.9
`
`0.88
`
`0.86
`
`0.84
`
`0.82
`
`4
`
`Submission
`
`Slide 20
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 20 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`Long Training Symbol (LTS)
`• Purposes of LTS
`– fine frequency offset estimation, Channel estimation
`
`• The proposed LTS
`– 2 x 2 system: the LTS occupies 2 OFDM symbol periods
`– 3 x 3 system: the LTS occupies 4 OFDM symbol periods
`– 4 x 4 system: the LTS occupies 4 OFDM symbol periods
`
`Submission
`
`Slide 21
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 21 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`The Structure of Proposed LTS
`
`L
`
`f
`
`W k
`2
`W k
`4
`
`
`
`
`
`exp(
`
`exp(
`
`
`
`)2/2
`jk
`)4/2
`jk
`
`2 x 2 Mode:
`
`0.8 µs
`
`CP
`
`CP
`
`Tx 1
`Tx 2
`
`3.2 µs
`
`IFFT(L)
`IFFT(L)
`
`3 x 3 Mode:
`
`0.8 µs
`
`3.2 µs
`
`Tx 1
`Tx 2
`Tx 3
`
`CP
`
`CP
`
`CP
`
`IFFT(L)
`IFFT(L)
`IFFT(L)
`
`4 x 4 Mode:
`
`0.8 µs
`
`3.2 µs
`
`Tx 1
`Tx 2
`Tx 3
`Tx 4
`
`CP
`
`CP
`
`CP
`
`CP
`
`IFFT(L)
`IFFT(L)
`IFFT(L)
`IFFT(L)
`
`CP
`
`CP
`
`IFFT(L)
`1IFFT(L)
`W2
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`IFFT(L)
`1IFFT(L)
`W4
`2IFFT(L)
`W4
`
`IFFT(L)
`1IFFT(L)
`W4
`2IFFT(L)
`W4
`3IFFT(L)
`W4
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`IFFT(L)
`2IFFT(L)
`W4
`4IFFT(L)
`W4
`
`IFFT(L)
`2IFFT(L)
`W4
`4IFFT(L)
`W4
`6IFFT(L)
`W4
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`CP
`
`IFFT(L)
`3IFFT(L)
`W4
`6IFFT(L)
`W4
`
`IFFT(L)
`3IFFT(L)
`W4
`6IFFT(L)
`W4
`9IFFT(L)
`W4
`
`t
`
`t
`
`t
`
`Submission
`
`Slide 22
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 22 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`Long Training Symbol (LTS)
`• The proposed LTSs are constructed with a basis sequence
`L.
`• We choose L the same as the long training sequence
`described in 11a
`
`L{-26,26} = { 1, 1, -1, -1, 1, 1, -1, 1, -1, 1, 1, 1, 1, 1, 1, -1, -1, 1, 1, -1, 1, -1, 1, 1, 1, 1, 0,
`1, -1, -1, 1, 1, -1, 1, -1, 1, -1, -1, -1, -1, -1, 1, 1, -1, -1, 1, -1, 1, -1, 1, 1, 1, 1 }.
`
`• The properties of the proposed LTSs are determined by L.
`
`• With the proposed LTSs, the receiver can effectively and
`efficiently estimate the frequency domain responses of
`MIMO channel.
`
`Submission
`
`Slide 23
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 23 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`Proposed Frequency-Domain LTS
`
`Submission
`
`Slide 24
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 24 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`Proposed Time-Domain LTS (w/o CP)
`
`Submission
`
`Slide 25
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 25 of 28
`
`

`

`September 2004
`doc.: IEEE 802.11-04/1014r2
`Proposed Time-Domain LTS (w/ CP)
`
`Submission
`
`Slide 26
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 26 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`
`Numerical Results
`
`The MSE of the channel estimates with
`proposed LTSs for 3x3 mode over channel
`B, D and E.
`
`The MSE of the channel estimates with
`proposed LTSs for 4x4 mode over channel
`B, D and E.
`
`11n Channel B for 4x4 system
`11n Channel D for 4x4 system
`11n Channel E for 4x4 system
`
`100
`
`10-1
`
`10-2
`
`10-3
`
`MSE per nonzero subcarrier
`
`11n Channel B for 3x3 system
`11n Channel D for 3x3 system
`11n Channel E for 3x3 system
`
`10
`
`25
`20
`15
`averaged received SNR
`
`30
`
`35
`
`10-4
`
`5
`
`10
`
`25
`20
`15
`averaged received SNR
`
`30
`
`35
`
`100
`
`10-1
`
`10-2
`
`10-3
`
`MSE per nonzero subcarrier
`
`10-4
`
`5
`
`Submission
`
`Slide 27
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 27 of 28
`
`

`

`September 2004
`
`doc.: IEEE 802.11-04/1014r2
`
`Conclusion
`• We propose STSs with the properties of
`– Period of 32 samples
`– Zero cross-correlation of the STSs
`– Low detection probability for 11a systems
`
`• With the proposed LTSs, the receiver can effectively and
`efficiently estimate the frequency domain responses of
`MIMO channel.
`
`Submission
`
`Slide 28
`
`Pangan Ting, CCL/ITRI
`
`Exhibit 1026
`Panasonic v. UNM
`IPR2024-00364
`Page 28 of 28
`
`

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