VI. CONCLUSION
A novel BIPCM-ID system has been developed using a polar encoder (at the transmitter) and a polar decoder (at the receiver) within a BICM-ID design. This system has been analyzed over AWGN channels with N = 128 for coderate= 1/2 over BPSK and 16PSK modulation schemes. Implementing the system with these parameters, it has been observed that under proper configurations (parameter values),
1) with 5 iterations of ID, BER performance can be improved from its contemporary BIPCM system by at least 3.8 dB over BPSK modulation for very low BER.
2) with 5 iterations of ID, BER performance can be improved from its contemporary BIPCM system by at least 3 dB over 16PSK modulation for very low BER.
High code diversity is very important to be able to well utilize the potential of a BIPCM-ID system. With a higher number of codewords concatenated for bit interleaving, higher code diversity and lower correlation amongst transmitted bits of the same codeword is achieved. The performance of BIPCM-ID can further be improved by increasing the number of ID iterations. Using a differential modulation scheme removes the error floor altogether. Polar Codes as a stand-alone error correction technique are provably capacity achieving codes for B-DMCs especially BEC. They are not specifically designed for high performance error correction over continuous channels. However, by developing a BIPCM-ID system it has been proved that with the help of some additional error correcting modules, Polar Coding can be a high performance error correction method over continuous channels like AWGN as well.
