Presentation is loading. Please wait.

Presentation is loading. Please wait.

Doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 1 Partial Proposal for 802.11n: ITRI Preamble Specification Yung-Yih Jian,

Published bySara Carson Modified over 8 years ago

Similar presentations

Presentation on theme: "Doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 1 Partial Proposal for 802.11n: ITRI Preamble Specification Yung-Yih Jian,"— Presentation transcript:

1 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 1 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

2 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 2 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

3 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 3 IFFT FFT CP FFT System block diagram ( 3 x 3 case ) The system is operated within 20MHz bandwidth in 5GHz band. FFT size is 64, and the period of a OFDM symbol is 3.2 us. The length of cyclic prefix (CP) is 0.8 us.

4 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 4 802.11n STS1 802.11n STS2 802.11n STS3 802.11n STS2 802.11n STS3 802.11n LTS31802.11n LTS32802.11n LTS33802.11n LTS34 802.11n LTS21802.11n LTS22802.11n LTS23802.11n LTS24 802.11n LTS11802.11n LTS12802.11n LTS13802.11n LTS14 MIMO frame detect, MIMO AGC Coarse freq. offset estimation, MIMO timing synchronization Channel estimation, fine frequency offset estimation Tx1 Tx2 Tx3 Proposed Preamble Structure ( 3 x 3 case ) Overlapped preambles structure is proposed Lower overhead caused by preamble

5 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 5 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.

6 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 6 Backward Compatibility Consideration Without considering channel and noise, the STSs of MIMO packet received by 11a system can be written as Low detection probability for 11a systems Find the STSs such that when received by 11a STA X ( )* X X X + Received short training symbol: Conventional frame detection algorithm of 11a systems

7 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 7 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

8 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 8 Proposed Short Training Symbol ( 3x3 case )

9 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 9 Proposed Short Training Symbol ( 4x4 case )

10 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 10 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.

11 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 11 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. 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.

12 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 12 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. 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.

13 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 13 Long Training Symbol (LTS) Purposes of LTS –fine frequency offset estimation, fine timing, MIMO timing synchronization, 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

14 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 14 The Structure of Proposed LTS Tx 1 Tx 2 Tx 3 Tx 1 Tx 2 Tx 3 Tx 4 Tx 1 Tx 2 L 3 x 3 Mode: 4 x 4 Mode: f t 3.2 µs0.8 µs IFFT( L ) W 4 3  IFFT(L) W 4 6  IFFT(L) IFFT( L ) W 4 2  IFFT(L) W 4 4  IFFT(L) IFFT( L ) W 4 1  IFFT(L) W 4 2  IFFT(L) IFFT( L ) CP IFFT(L) CP 3.2 µs0.8 µs IFFT( L ) W 4 3  IFFT(L) W 4 6  IFFT(L) IFFT( L ) W 4 2  IFFT(L) W 4 4  IFFT(L) IFFT( L ) W 4 1  IFFT(L) W 4 2  IFFT(L) IFFT( L ) CP IFFT(L) CP W 4 9  IFFT(L)W 4 6  IFFT(L)W 4 3  IFFT(L) CP IFFT(L) CP t 2 x 2 Mode: t 3.2 µs0.8 µs IFFT( L ) W 2 1  IFFT(L) IFFT( L ) CP

15 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 15 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 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.

16 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 16 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.

17 doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 17 Thank you!

Download ppt "Doc.: IEEE 802.11-04/1014r0 Submission September 2004 Pangan Ting, CCL/ITRISlide 1 Partial Proposal for 802.11n: ITRI Preamble Specification Yung-Yih Jian,"

Similar presentations

Doc.: IEEE 802.11-04/794r1 Submission Slide 1 André Bourdoux (IMEC) July 2004 Preambles for MIMO channel estimation André Bourdoux Bart Van Poucke Liesbet.

Doc.: IEEE /794r1 Submission Slide 1 André Bourdoux (IMEC) July 2004 Preambles for MIMO channel estimation André Bourdoux Bart Van Poucke Liesbet.
Doc.: IEEE 802.11-12/0115r0 Submission January 2012 Ron Porat, Broadcom 32FFT STF/LTF Sequences Date: 2012-01-16 Authors: Slide 1.

Doc.: IEEE /0115r0 Submission January 2012 Ron Porat, Broadcom 32FFT STF/LTF Sequences Date: Authors: Slide 1.
Implement a 2x2 MIMO OFDM-based channel measurement system (no data yet) at 2.4 GHz Perform baseband processing and digital up and down conversion on Nallatech.

Implement a 2x2 MIMO OFDM-based channel measurement system (no data yet) at 2.4 GHz Perform baseband processing and digital up and down conversion on Nallatech.
May 2015 Submission doc.: 05-15-1082-05-00aj Shiwen He, Haiming Wang PPDU Format for IEEE 802.11aj (45GHz) Authors/contributors: Date: 2015-05-19 Presenter:

May 2015 Submission doc.: aj Shiwen He, Haiming Wang PPDU Format for IEEE aj (45GHz) Authors/contributors: Date: Presenter:
May 2015 Submission doc.: 05-15-1082-04-00aj Shiwen He, Haiming Wang PPDU Format for IEEE 802.11aj (45GHz) Authors/contributors: Date: 2015-05-19 Presenter:

May 2015 Submission doc.: aj Shiwen He, Haiming Wang PPDU Format for IEEE aj (45GHz) Authors/contributors: Date: Presenter:
May 2015 Submission doc.: 05-15-1082-03-00aj Shiwen He, Haiming Wang PPDU Format for IEEE 802.11aj (45GHz) Authors/contributors: Date: 2015-05-19 Presenter:

May 2015 Submission doc.: aj Shiwen He, Haiming Wang PPDU Format for IEEE aj (45GHz) Authors/contributors: Date: Presenter:
1 Data-carrier Aided Frequency Offset Estimation for OFDM Systems.

1 Data-carrier Aided Frequency Offset Estimation for OFDM Systems.
Submission doc.: IEEE 802.11-14/0081r1 Date: 2015-01-13 Considerations on 11ax Auto-detection Methods January 2015 Jaeyoung Song, KAISTSlide 1 Authors:

Submission doc.: IEEE /0081r1 Date: Considerations on 11ax Auto-detection Methods January 2015 Jaeyoung Song, KAISTSlide 1 Authors:
Doc.: IEEE 802.11-14/1211r0 Submission September 2014 Yongho Seok, NEWRACOM Ack Procedure for OFDMA Date: 2014-09-14 Authors: Slide 1.

Doc.: IEEE /1211r0 Submission September 2014 Yongho Seok, NEWRACOM Ack Procedure for OFDMA Date: Authors: Slide 1.
Doc.: IEEE 802.11-14/1228r0 Submission September 2014 xxx, NEWRACOM Issues on 256-FFT per 20MHz Date: 2014-09-14 Authors: Slide 1.

Doc.: IEEE /1228r0 Submission September 2014 xxx, NEWRACOM Issues on 256-FFT per 20MHz Date: Authors: Slide 1.
1 CFO Estimation with ICI Cancellation for OFDM Systems 吳宗威.

1 CFO Estimation with ICI Cancellation for OFDM Systems 吳宗威.
Doc.: IEEE 802.11-14/1399r0 Submission November 2014 Multi-Carrier Training Field for OFDM Transmission in 802.11aj (45GHz) Authors/contributors: Date:

Doc.: IEEE /1399r0 Submission November 2014 Multi-Carrier Training Field for OFDM Transmission in aj (45GHz) Authors/contributors: Date:
1 IEEE 802.16m Synchronization Channel IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/823r3 Date Submitted: 2008-07-09.

1 IEEE m Synchronization Channel IEEE Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/823r3 Date Submitted:
1 IEEE 802.16m Synchronization Channel IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/823r1 Date Submitted: 2008-07-09.

1 IEEE m Synchronization Channel IEEE Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/823r1 Date Submitted:
Doc.: IEEE 802.11-15/0099 Submission Payload Symbol Size for 11ax January 2015 Ron Porat, BroadcomSlide 1 Date: 2015-01-12 Authors:

Doc.: IEEE /0099 Submission Payload Symbol Size for 11ax January 2015 Ron Porat, BroadcomSlide 1 Date: Authors:
Wireless Communication Technologies 1 Outline 2.5.1 Introduction 2.5.2 OFDM Basics 2.5.3 Performance sensitivity for imperfect circuit 2.5.4 Timing and.

Wireless Communication Technologies 1 Outline Introduction OFDM Basics Performance sensitivity for imperfect circuit Timing and.
NTU Confidential Baseband Transceiver Design for the DVB-Terrestrial Standard Baseband Transceiver Design for the DVB-Terrestrial Standard Advisor : Tzi-Dar.

NTU Confidential Baseband Transceiver Design for the DVB-Terrestrial Standard Baseband Transceiver Design for the DVB-Terrestrial Standard Advisor : Tzi-Dar.
Doc.: IEEE 802.11-04/0abcr0 Submission Sept 2004 Mustafa Eroz, Hughes Network SystemsSlide 1 HNS Proposal for 802.11n Physical Layer Mustafa Eroz, Feng-Wen.

Doc.: IEEE /0abcr0 Submission Sept 2004 Mustafa Eroz, Hughes Network SystemsSlide 1 HNS Proposal for n Physical Layer Mustafa Eroz, Feng-Wen.
Doc.: IEEE 802.11-04/0075r0 Submission January 2004 H. Sampath, PhD, Marvell SemiconductorSlide 1 Pros and Cons of Circular Delay Diversity Scheme for.

Doc.: IEEE /0075r0 Submission January 2004 H. Sampath, PhD, Marvell SemiconductorSlide 1 Pros and Cons of Circular Delay Diversity Scheme for.
Doc.: IEEE 802.11-98/383 Submission November1998November 1998 Jamshid Khun-Jush, ETSI-BRANSlide 1 BRAN#11 PHY Decisions & Issues to Resolved with 802.11.

Doc.: IEEE /383 Submission November1998November 1998 Jamshid Khun-Jush, ETSI-BRANSlide 1 BRAN#11 PHY Decisions & Issues to Resolved with

Similar presentations

Ads by Google