Abstract:

For improving system bandwidth efficiency, an orthogonal pulses designing method with high efficiency based on timelimited prolate spheroidal wave functions is proposed. Frequency band is divided into multiple subbands which are overlapped in frequency domain. Bandpass and timelimited prolate spheroidal wave functions are derived from each subband based on the frequencytime domain pulse designing method. Orthogonal pulses are constructed by an orthogonalization method. The pulses’ spectrum is mixed in the same subband and overlapped in adjacent subband. Theory analysis and simulation results show that the orthogonal pulses have good energy concentration in frequency domain and the maximum system bandwidth efficiency is as great as 2 Baud/Hz.