Digital Signal Processing Reference
In-Depth Information
Chapter 7
HI-SPEED ERROR CORRECTING CODE LSI
FOR MOBILE PHONE
Yuuichi Hamasuna
1
, Masayasu Hata
2
, Ichi Takumi
3
1
DDS Inc., Otohbashi, Nakagawa-ku, Nagoya 454-0012 Japan;
2
Chubu University, Kasugai,
Aichi 487-8501 Japan;
3
Nagoya Institute of Technology, Gokiso, Nagoya, Aichi 466-5588
Japan.
Email:hamasuna@dds.co.jp
Abstract:
In recent years, the transmission speed of a cellular phone of the next generation
has reached 100Mbps, and the transmission speed of optical communication
amounts to 40 Gbps. Accordingly, demand for robust error correction code
with high-speed processing of a Gbps class is increasing. The proposed code
“High dimensional torus knot code” performs well in a field with many errors.
In a performance comparison with the Reed-Solomon code, the performance of
the proposed code is better than the Reed-Solomon code in an environment
with error. Moreover, doing a simulation in a CDMA communication
environment, fluttering of error property has not occurred with the product
code of convolutional codes (as inner code: the rate is 1/2) and the proposed
code (as outer code: the rate is 0.53). Alternatively, under the same conditions,
a fluttering error occurred in the Turbo cord. By applying the LSI technology,
we developed ASIC of the proposed code, and FPGA for the high-speed
MPEG communication device. We developed the three-dimensional, size-nine
3Dm9 and 4Dm5 chip. More specifically, the 3Dm9-code chip (developed in
2001) having a rate of 0.70 and block length of 729 bits was burnt onto a 100-
kilogate, 0.35-micron-order LSI chip, and the 4Dm5-code chip (r=0.41,
block=625, developed in 1999) was burnt onto a 50-kilogate, 0.6-micron-order
LSI chip. Moreover, the 3Dm9-code chip was operated at a clock speed of
66.6MHz with throughput of 48Gbps. Finally, after applying the developed
FPGA, the high-speed MPEG communication device can transmit a movie
signal of 33Mbps.
Keywords:
High-Dimensional Discrete Torus Knot Code, Robust error correction code,
High-throughput(48 Gbps) Coder and Decoder, Wired logic
