Ping Li, Xia Shao, Wei dang Zhang
How to improve the channel coding capacity and reduce the bit error rate have been the main research directions of channel coding. In order to improve the bit error rate (BER) performance based on a formula derived from the Union Bound which can estimate the bit error rate for every position in the codeword sequence, this paper presented a new method to optimize the bit energy. By the new energy allocation, the energy of each bit in the codeword is optimized. The simulation shows that BER performance can be improved noticeable not only at high signal noise ratio (SNR), but also at low and moderate SNR.