TurboConcept
1, av. du Technopôle
29280 PLOUZANE
FRANCE
phone : +33 2 29 00 19 88
fax : +33 2 29 00 18 03
www.turboconcept.com
TC3000
Turbo Product Code decoders
Introducing turbo product codes with BCH “t=2” codes
Customisable bitrate : 7 to 25 Mbits/s
Turbo codes improves a transmission link by an additional gain of 2 to 3 decibels, compared
to classical FEC solutions.
TC3000 is a family of IP Cores offering powerful and flexible turbo product codes. TC3000 is
the first IP Core implementing Hamming and double-error-correcting BCH product codes. A
highly generic approach allows TC3000 to be precisely optimised for a target application.
Features
•
•
•
•
•
•
•
•
Very High FEC performance :
Hamming and "BCH-t=2"
codes
Bitrate customisable :
7 to 25 Mbits/s
typical @ 5 iterations
Large block sizes :
up to 65 kbits
On-the-fly change of the code
Shortening facilities to adjust packet size and coding rate
Single-chip PLD IP Core : Altera APEX, no external memory required
Latency reduction by bank-swapping
Two selectable configuration interface
Bitrate/Complexity trade-off
bitrate @ 5iter.
25 Mbit/s
TC3014
TC3024
14 Mbit/s
TC3012
TC3022
7 Mbit/s
TC3011
TC3021
2k
5k
10k
parity and hamming product codes
parity, hamming and BCH t=2 product codes
20k Logic Elements
This document contains preliminary information. Information is subject to change without notice.
TC3000 is covered by several patents.
Flexibility
TC3000 family offers 3 levels of flexibility :
TC3000 family member
VHDL generic parameters
before synthesis
On-the fly parameters
from block to block
9
9
9
9
9
9
9
9
9
9
9
BCH t=2 code support (YES/NO)
Choice on bitrate
Maximum row code length
Maximum column code length
Input Quantization width
1 or 2 input buffers
Row code
Column code
Shortening values
Max. number of iterations
Stopping feature enabled
FEC performance
Very high FEC performance are obtained for various block sizes and coding rates. The FEC behaviour
of the “BCH t=2” codes makes them particularly attractive for quasi-error free applications.
Ö
Gaussian channel and QPSK modulation. Results given with 5
-5
iterations.
Product Code
(32,26) x (32,26)
(32,21) x (32,21)
(64,57) x (64,57)
(64,51) x (64,51)
(128,120) x (128,120)
(128,113) x (128,113)
(256,247) x (256,247)
(256,239) x (256,239)
Rate Eb/N0 @BER=10
0.660
2.9 dB
0.431
2.4 dB
0.793
3.2 dB
0.635
2.6 dB
0.879
3.8 dB
0.779
3.3 dB
0.931
4.5 dB
0.872
4.0 dB
Eb/N0 @BER=10
-8
3.6 dB
N.A.
3.6 dB
2.9 dB
4.2 dB
3.4 dB
4.8 dB
N.A.
Block Diagram
Input
Interface
DCK
DBLK
DEN
D[D_WIDTH-1:0]
DRDY
Input
Buffer #1
Input
module
Input
Buffer #0
Decoder
module
Output
Buffer
Output
module
QCK
QBLK
QEN
Q
QRDY
Output
Interface
Global
Signals
CK
RSTB
MSELECT
Configuration module
TC3000
Dedicated
Configuration
I/Os
MDATA[7:0]
MADDR[3:0]
MCSn
T_C[1:0]
ITMAX[3:0]
ITSTOP
M_R[3:0]
T_R[1:0]
M_C[3:0]
Implementation results
Product
Codes supported
Hamming
BCH t=2
Row max.
length
TC3011
TC3014
TC3022
9
9
9
9
Generic parameter setting
Column
Data bank
max. length
width swap
64
64
4
NO
64
64
4
NO
128
128
4
NO
64
64
4
NO
MRDn
MWRn
Microcontroller
Interface
LE
2025
6926
8115
8932
ESB
22
36
88
24
Implementation results
APEX20K Fmax
Typical Bitrate
device
MHz
@(64,57)², 5 iterations
200 C7
82
8 Mbits/s
200 C7
72
25 Mbits/s
400 C7
67
23.5 Mbits/s
400 C7
79
14 Mbits/s
This document contains preliminary information. Information is subject to change without notice.
TC3000 is covered by several patents.
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