01448r0P802-15_TG3-Trellis-Coding-for-QPSK-16-32-64-QAM

7/18/2019 01448r0P802-15_TG3-Trellis-Coding-for-QPSK-16-32-64-QAM

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Project: IEEE P802.15 Working Group for Wireless Personal Area

Project: IEEE P802.15 Working Group for Wireless Personal Area

Netorks !WPANs"Netorks

!WPANs"

#u$%ission &itle:Trellis Coding for QPSK, 16/32/64-QAM Transmission modes'ate #u$%itte(: 12 Oco!er 2""1

#ource:#e$%an Karaog&'

A((ress:(roadcom Cor)oraion, 1621* Alon Par+a$, r.ine, CA 261

)oice:4 *0* 6160

E*+ail:e$%an!roadcomcom

,e:

A$stract:T%is )ro)osal descri!es an 0-Sae Trellis Code s&ia!le for QPSK, 16/32/64-QAM

ransmission modes deli.ering 11, 33, 44, ** M!)s

Purpose:

Notice:T%is doc&men %as !een )re)ared o assis %e P0"21* is offered as a !asis for

disc&ssion and is no !inding on %e conri!&ing indi.id&al5s or organi'aion5s T%e maerial in %is

doc&men is s&!ec o c%ange in form and conen afer f&r%er s&d$ T%e conri!&or5s reser.e5s

%e rig% o add, amend or i%dra maerial conained %erein

,elease:T%e conri!&or ac+noledges and acce)s %a %is conri!&ion !ecomes %e

)ro)er$ of and ma$ !e made )&!licl$ a.aila!le !$ P0"21*

'oc.: IEEE 802.15*01-8r0


2/13

'oc.: IEEE 802.15*01-8r0

Signal Consellaions

1/*A+ &+ ! +$it-s"

2*A+ &+ ! +$it-s"

/*A+ &+ !55 +$it-s"

P#3 !22 +$it-s unco(e(4

11 +$it-s co(e( "


3/13

'oc.: IEEE 802.15*01-8r0

QPSK, 16/32/64-QAM Se Pariioning

D0 D4 D2

D0

D6

D2

D1

D1

D5

D3

D3 D7

1/4 24 /*A+ #et

Partitioning(

(8(2 (

P#3 #et

Partitioning(


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'oc.: IEEE 802.15*01-8r0

0-Sae M&li-7ae TCM ncoder

2*A+

/*A+

2-8 O&)&

o P&lse S%a)ing

9iler

!2

!3

!4

1,3,4,*

!is/s$m!ol

QPSK, 16/32/64 QAM TCM

Mode Selecion

#u$set

#election

!'044'6"

T 7 T T7

1/*A+

!o

!1

#%$ol #election

fro% #u$sets

P#3

5:" for QPSK


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'oc.: IEEE 802.15*01-8r0

Trellis Sae Transiions for 16,32,64-QAM

'0 '2 ' '/

'5 '6 '1 '

'2 '0 '/ '

'6 '5 ' '1

' '/ '0 '2

'1 ' '5 '6

'/ ' '2 '0

' '1 '6 '5

Minim&m disance error e.en occ&rs !eeen code se;&ences'0*'0*'0 and'2*'1*'/

S;&ared &clidean disance !eeen %ese se;&ences


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'oc.: IEEE 802.15*01-8r0

Trellis Sae Transiions for QPSK

Minim&m disance error e.en occ&rs !eeen code se;&ences< '0*'0*'0*'0and '2*'1*'0*

'2

S;&ared &clidean disance !eeen %ese se;&ences< 2(27 (27 07 2(2

A))ro=imae coding gain< 10log!5-2" 9 ( !co%pare( to unco(e( P#3"

'0 '2

'1 '

'2 '0

' '1

'0 '2

'1 '

'2 '0

' '1

#0

#1

#2

#

#

#5

#/

#6


7/13

'oc.: IEEE 802.15*01-8r0

O)imal 0-Sae M&li-7ae TCMncoder

2*A+

/*A+

2-8 O&)&

o P&lse S%a)ing

9iler

!2

!3

!4

1,3,4,*

!is/s$m!ol

QPSK, 16/32/64 QAM TCM

Mode Selecion

#u$set

#election

!'044'6"

T 7 T T7

1/*A+

!o

!1

#%$ol #election

fro% #u$sets

P#3

5:" for QPSK

' IEEE 802 1 01-8 0


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'oc.: IEEE 802.15*01-8r0

O)imal Trellis Sae Transiions forQPSK

Minim&m disance error e.en occ&rs !eeen code se;&ences< '0*'0*'0*'0*'0and '2*'1*'*'0*

'2

S;&ared &clidean disance !eeen %ese se;&ences< 2(27 (27 (27 07 2(2

A))ro=imae coding gain< 10log! /-" 9 .8 ( !co%pare( to unco(e( P#3"

'0 '2

'1 '

'2 '0

' '1

'0 '2

'1 '

'2 '0

' '1

' IEEE 802 15 01-8 0


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'oc.: IEEE 802.15*01-8r0

7ecei.er Sensii.i$

Receiver Sensitivity:AWGN14 MHz BW+ Noise Figure (15 dB) + SNR10-5BER

-68 dBm for 64-QAM TCM, 55 Mbit/sec



-75 dBm for QPSK (uncoded), 22 Mbit/sec

-78 dBm for BPSK (uncoded), 11 Mbit/sec

-82 dBm for QPSK-TCM (optimal code), 11 Mbit/sec

' IEEE 802 15 01-8 0


10/13

'oc.: IEEE 802.15*01-8r0

Com)arison of S>7 7e;&iremens

Operating at 10-5BER

22 Mbps uncoded QPSK modulation requires 12.6 dB SNR

11 Mbps uncoded BPSK modulation requires 9.6 dB SNR

11 Mbps QPSK-TCM modulation requires 5.5 dB SNR

When uncoded QPSK operates at 10-5BER

11 Mbps uncoded BPSK achieves 10-9BER

11 Mbps QPSK-TCM achieves 10-21BER

' IEEE 802 15 01-8 0


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'oc.: IEEE 802.15*01-8r0

?eader and Pa$load Coding

224 4 4 55 +$ps !P#34 1/-2-/*A+ &+" &rans%ission +o(es

Header (MAC+PHY) Payload

P#3 P#34 1/-2-/*A+ &+

11 +$ps P#3*&+ &rans%ission +o(e

P#3*&+ P#3*&+P#3

Header (MAC+PHY)Repeat

Header (MAC+PHY) Payload

'oc : IEEE 802 15 01-8r0


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'oc.: IEEE 802.15*01-8r0

Concl&sions

Use of QPSK-TCM for 11 Mbps transmission modeallows the same signal constellation used in the base

QPSK mode

No mention of BPSK signalling, constellation, EVM spec, etc.

Same 8-State TCM code is used for transmission

modes 11, 33, 44, 55 Mbps

QPSK-TCM achieves 4 dB more coding gain

compared to 11 Mbps uncoded BPSK modulation

'oc : IEEE 802 15 01-8r0


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'oc.: IEEE 802.15*01-8r0

7eferences

Channel Coding with Multilevel/Phase Signals, G. Ungerboeck,

IEEE Transactions on Information Theory, January 1982

Documents

01448r0P802-15_TG3-Trellis-Coding-for-QPSK-16-32-64-QAM