Digital Signal Processing Reference
In-Depth Information
distance of of uncoded 4-PSK. Therefore, the required Eb/No of
the proposed code with 8-PSK TCM is estimated as 2.0 to 2.5dB for 4Dm5
and 4Dm6 codes to obtain The value is sufficiently competitive to that
of the Turbo code with interleaver of 1024, especially for high-grade BER
ranges less than The performance is also similar to the concatenated
code of the Reed-Solomon (204,188) with the 3/4 punctured convolution
code for digital TV and for space communications [2,3,4,5].
Figure 7-5.
Results of the simulation in CDMA environment.
4.
HARDWARE IMPLEMENTATION
The proposed code consists of a simple parity check code. Therefore, we
discovered the simple relation between parity and data digits. Accordingly, a
significant part of the encoding and decoding processes are substituted with
wired connections between memory cells. We developed a program to
