The Dicode PPM (DiPPM) Essay Example | Topics and Well Written Essays - 500 words

The Dicode PPM (DiPPM) - Essay Example The results from the simulation tests have revealed that when the RS decoder is used it increases the transmission efficiency of the DiPPM to a large extent by decreasing the number of photons. In addition, the system using the RS code has also been shown to provide an improvement of 5.12 dB as compared to the systems which do not employ the RS code. Such an improvement is observed when the code functions at the optimum rate of (3/4) and at a code length.Further, the results have also shown that at this optimum code rate, the DiPPM system achieves maximum transmission efficiency. However, when the system is operated below this optimum level, there is an increase in the number of redundant symbols which in turn negatively affects the performance of the system. It is only above the optimum coding rate that the redundant symbols are found to decrease which implies that the amount of correcting symbols also decrease thereby reducing the transmission efficiency. From the results, it is al so evident that the DiPPM system while using the RS code required only about 14.3 x 103 photons per pulse when it is operated at a bandwidth equal to or above 0.9 times the PCM data rate. On a comparative basis when the DiPPM system uses the MLSD system it achieves a reduction in a number of photons per pulse when it is operated at a bandwidth of less than 1 normalization. From this, it is evident that the DiPPM system when using the RS code outperforms that of the MLSD system when it is operated at a high bandwidth.