Weighting factor estimation methods for partial transmit sequences OFDM to reduce peak power

摘要

OFDM modulation has attracted attention for fourth-generation mobile communication systems and high-speed wireless LANs. However, it has a very serious problem of large peak power. PTS(partial transmit sequences)has been proposed as one solution to this problem. In PTS, the OFDM subcarriers are divided into several clusters, and the phase of each cluster is rotated by a complex weight to minimize the PAPR(peak-to- average power ratio). However, the weight of the phase rotation must be sent to the mobile terminal by using a side informa- tion channel.