AHA4541 View Datasheet(PDF) - Unspecified
Part Name
Description
Manufacturer
AHA4541 Datasheet PDF : 4 Pages
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CODE TYPES
comtech aha corporation
Table 1 shows a partial list of the codes supported by this product. Note that this is not a complete list
of base codes. In addition, each of the codes listed can be shortened to achieve smaller block size with only
minor changes to code rate.
Table 1: Partial Code List
CODE
(X)x(Y)x(Z)
(128,127)x(128,126)+
(128,120)x(128,126)+
(128,120)x(128,120)
(64,57)x(16,15)x(16,15)
(128,127)x(64,62)+
(128,120)x(64,62)+
(128,120)x(64,57)
(32,26)x(16,15)x(16,15)
(64,63)x(64,62)+
(64,57)x(64,57)
(64,63)x(32,30)+
(64,57)x(32,26)
(32,26)x(32,26)
BLOCK SIZE
(bits)
16384
16384
16384
16384
8192
8192
8192
8192
4096
4096
2048
2048
1024
DATA SIZE
(bits)
16002
15120
14400
12825
7874
7440
6840
5850
3906
3249
1890
1482
676
RATE
0.977
0.923
0.879
0.783
0.961
0.908
0.84
0.714
0.954
0.793
0.923
0.724
0.660
CODING GAIN
(dB)
4.3*
5.5*
6.6*
7.2
4.4*
5.5*
6.8
7.2
4.5*
7.1
4.5*
6.9
6.3
* Estimated Coding Gain is measured on a Binary Input Additive White Gaussian Noise (AWGN) channel at 10-6 Bit
Error Rate (BER) with maximum decoder iterations that support a data rate of 311 Mbps. Only TPC codes with
code rates above 0.86 meet the 311 Mbps data rate.
+ enhanced TPC (includes hyper diagonal axis).
Figure 1: Turbo Product Code Encoder/Decoder
ENCODER
ENC_DATA
CRC
Insertion
Scrambler
TPC
Encoder
Helical
Interleaver
Sync
Constellation
Insertion
Mapper
DECODER
DEC_DATA
CRC
Verification
Descrambler
TPC
Decoder
Helical
Deinterleaver
Sync
Detection
Soft
Metric
Computation
XMIT_DATA
REC_DATA
uP_INT
Microprocessor Interface,
Control and Status
Registers
AHA4541
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