5/7/2019 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [modulation summary for TG4a] Date Submitted: [2 August 2005] Source: [Ismail Lakkis] Company [Wideband Access, Inc.] Voice:[+1 858 642 9114], E-Mail: [ilakkis@widebandaccess.com] Abstract: [Pulse Compression proposal] Purpose: [Assist the group in the selection of a modulation scheme] Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15. Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Options I, II, III & IV Options I, II, III & IV are the result of collaboration with: Ismail Lakkis Wideband Access Inc. Saeid Safavi Wideband Access Inc. Andy Molisch Mitsubishi Electric Philip Orlik Mitsubishi Electric Zafer Sahinoglu Mitsubishi Electric Matt Welborn Freescale Semiconductor Shahriar Emami Freescale Semiconductor Francois Shin I2R Michael Mc Laughlin decaWave Ryuji Khono NICT Vern Berthour Time Domain Corp. Ismail Lakkis (Wideband Access, Inc.)
Bipolar & Ternary Scrambling 5/7/2019 Bipolar & Ternary Scrambling Ismail Lakkis (Wideband Access, Inc.)
Bipolar Burst & Burst PMM 5/7/2019 Bipolar Burst & Burst PMM Average PRF = 15.4375 MHz Average PRI = 64.77 ns Target data rate (before FEC) = 1.93 Mbps Target data rate (after FEC) = 0.965 Mbps bit duration = 518.2 ns number of pulses per bit for a 1.93 MHz data rate = 8 ON pulses Option I: Bipolar burst for coherent Burst PPM for non-coherent Option II: Burst PPM + polarity for Coherent (2 bits/Symbol) Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Option I Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Option I - Performance Modulation – Same as slide 5 right column for both coherent and non-coherent receivers (method for beacon transmission/heterogeneous PAN) FEC polynomial = [23 35] ; soft decision; trace back depth = 33; Acquisition assumed for both receivers Non-coherent receiver – simple energy detector Coherent receiver – 10 tap rake Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Option I - Performance Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Option I - Performance Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Option II Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Option III Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Option IV Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Receiver Structure Ismail Lakkis (Wideband Access, Inc.)
5/7/2019 Option V (NICT) Joint optimization of spreading rate and SOC rate (Super-Orthogonal Convolutional code) Improved performance over spreading followed by rate ½ convolutional code ? Ismail Lakkis (Wideband Access, Inc.)
Option VI: STM Time-Hopping (TH) Impulse Radio (IR) Flexible receiver: 5/7/2019 Option VI: STM Time-Hopping (TH) Impulse Radio (IR) Flexible receiver: Non-coherent (PPM) Coherent (PPM + BPSK) Extension: Diff. coherent (PPM + DBPSK) Ts Tc Tf +1 -1 Ismail Lakkis (Wideband Access, Inc.)
Option VI: STM System Parameters Frame levels (Nf) = 16 5/7/2019 Option VI: STM System Parameters Frame levels (Nf) = 16 Guard time/frame (Tg) = 14Tc = 28 ns TH sequence length (LPN) = 8 PN sequence (used in simulations) = [1,-2,3,-4,-2,3,-5,1] Symbol time (Tg + Nf *Tc) * LPN = 484.8 ns Ismail Lakkis (Wideband Access, Inc.)
Option 7 / 8 / 9 PRFpeak (MHz) Coherent Non-Coherent (Option 7) 5/7/2019 Option 7 / 8 / 9 PRFpeak (MHz) Coherent Non-Coherent (Option 7) (Option 8) (Option 9) 30.875 Same as Option II 2 coded bit / 32 chip (4-ary 32-TOK sequence) 4 info. bit / 128 chip (based on 16-ary 32-TOK sequence) (based on 16-ary 127-TOK sequence) 61.75 Not Applicable 4 info. bit / 256 chip 247 4 info. bit / 1024 chip Ismail Lakkis (Wideband Access, Inc.)
Modulation & Coding (Option 7) 5/7/2019 Modulation & Coding (Option 7) Coded Bits Bit-to- Symbol Symbol- to-Chip Symbol Repetition Pulse Generator Scrambling {0,1,-1} Ternary Sequence Bit to symbol mapping: group every 2 coded bits into a symbol (after ½ rate Conv Encoding) Symbol-to-chip mapping: Each 2-bit symbol is mapped to one of 4 32-chip sequence, according to 4-ary Ternary Orthogonal Keying Symbol Repetition: for data rate and range scalability Scrambling: with bipolar sequence @ 30.875MHz, to suppress cross correlation sidelobes due to excessive delay spread Pulse Genarator: Transmit Ternary pulses @ 30.875MHz Ismail Lakkis (Wideband Access, Inc.)
PBTS Seq #1 1 zero padding Symbol-to-Chip Mapping (Option 7): 5/7/2019 Symbol-to-Chip Mapping (Option 7): Gray coded 4-ary Ternary Orthogonal Keying Symbol Cyclic shift to right by n chips, n= 32-Chip value 00 + 0 + + 0 0 0 - + - + + 0 0 + + 0 + 0 0 - 0 0 0 0 - 0 + 0 - - 0 01 8 0 0 - 0 + 0 - - + 0 + + 0 0 0 - + - + + 0 0 + + 0 + 0 0 - 0 0 0 11 16 + 0 + 0 0 - 0 0 0 0 - 0 + 0 - - + 0 + + 0 0 0 - + - + + 0 0 + 0 10 24 - + - + + 0 0 + + 0 + 0 0 - 0 0 0 0 - 0 + 0 - - + 0 + + 0 0 0 0 PBTS Seq #1 1 zero padding Ismail Lakkis (Wideband Access, Inc.)
Modulation & Coding (Option 8) 5/7/2019 Modulation & Coding (Option 8) Info. Bits Bit-to- Symbol Symbol- to-Chip Symbol Repetition Pulse Generator Scrambling {0,1,-1} Ternary Sequence Bit to symbol mapping: group every 4 information bits into a symbol (No ½ rate Conv Encoding) Symbol-to-chip mapping: Each 4-bit symbol is mapped to one of 16 N-chip sequence, according to 16-ary Ternary Orthogonal Keying Symbol Repetition: for data rate and range scalability Scrambling: with bipolar sequence @ PRFpeak, to suppress cross correlation sidelobes due to excessive delay spread Pulse Genarator: Transmit Ternary pulses @ PRFpeak(either 30.875, 61.75 or 247MHz) Ismail Lakkis (Wideband Access, Inc.)
N-Chip value before Scrambling 5/7/2019 Symbol-to-Chip Mapping (Option 8): Gray coded 16-ary Ternary Orthogonal Keying Symbol Cyclic shift N-Chip value before Scrambling 0000 +0++000-+-++00++0+00-0000-0+0--0 0001 2 --+0++000-+-++00++0+00-0000-0+00 0011 4 +0--+0++000-+-++00++0+00-0000–00 0010 6 –0+0--+0++000-+-++00++0+00-00000 0110 8 00-0+0--+0++000-+-++00++0+00-000 0111 10 0000-0+0--+0++000-+-++00++0+00–0 0101 12 0-0000-0+0--+0++000-+-++00++0+00 0100 14 +00-0000-0+0--+0++000-+-++00++00 1100 16 +0+00-0000-0+0--+0++000-+-++00+0 1101 18 0++0+00-0000-0+0--+0++000-+-++00 1111 20 +00++0+00-0000-0+0--+0++000-+-+0 1110 22 -++00++0+00-0000-0+0--+0++000-+0 1010 24 -+-++00++0+00-0000-0+0--+0++0000 1011 26 00-+-++00++0+00-0000-0+0--+0++00 1001 28 +000-+-++00++0+00-0000-0+0--+0+0 1000 30 0++000-+-++00++0+00-0000-0+0--+0 PRFpeak (MHz) N-chip / symbol What +,-,0 represents 30.875 128 + = ++++ - = ---- 0 = 0000 61.75 256 + = ++++0000 - = ----0000 0 = 00000000 247 1024 + = ++++0000 00000000 00000000 00000000 - = ----0000 00000000 0 = 00000000 00000000 Ismail Lakkis (Wideband Access, Inc.)
Modulation & Coding (Option 9) 5/7/2019 Modulation & Coding (Option 9) Info. Bits Bit-to- Symbol Symbol- to-Chip Symbol Repetition Pulse Generator Scrambling {0,1,-1} Ternary Sequence Bit to symbol mapping: group every 4 information bits into a symbol (No ½ rate Conv Encoding) Symbol-to-chip mapping: Each 4-bit symbol is mapped to one of 16 128-chip sequence, according to 16-ary Ternary Orthogonal Keying Symbol Repetition: for data rate and range scalability Scrambling: with bipolar sequence @ 30.875MHz, to suppress cross correlation sidelobes due to excessive delay spread Pulse Genarator: Transmit Ternary pulses @ 30.875MHz Ismail Lakkis (Wideband Access, Inc.)
PBTS Seq#1 Symbol-to-Chip Mapping (Option 9): 5/7/2019 Symbol-to-Chip Mapping (Option 9): Gray coded 16-ary Ternary Orthogonal Keying Symbol Cyclic shift 128-Chip value 0000 0000+++-++-0+0+0-00++00-++0+--0-00+0++000+-0+++-0-+0-0--0--00+00 +000+-+0000+0-++--00+0+0+--00--0+000-00+-+-000-0-0000++00000+000 0001 8 00000+000000+++-++-0+0+0-00++00-++0+--0-00+0++000+-0+++-0-+0-0-- 0--00+00+000+-+0000+0-++--00+0+0+--00--0+000-00+-+-000-0-0000++0 0011 16 0-0000++00000+000000+++-++-0+0+0-00++00-++0+--0-00+0++000+-0+++- 0-+0-0--0--00+00+000+-+0000+0-++--00+0+0+--00--0+000-00+-+-000-0 0010 24 ... 0110 32 0111 40 0101 48 0100 56 1100 64 1101 72 1111 80 1110 88 1010 96 1011 104 1001 112 0-00++00-++0+--0-00+0++000+-0+++-0-+0-0--0--00+00 +000+-+0000+0- ++--00+0+0+--00--0+000-00+-+-000-00000++00000+000000+++-++-0+0+0 1000 120 -++-0+0+0-00++00-++0+--0-00+0++000+-0+++-0-+0-0--0--00+00 +000+- +0000+0-++--00+0+0+--00--0+000-00+-+-000-00000++00000+000000+++0 PBTS Seq#1 Ismail Lakkis (Wideband Access, Inc.)