一种新的时分复用技术-重叠时分复用

In order to promote the spectral efficiency of the system, a new time division multiplexing technique which is called overlapped time division multiplexing (OVTDM) is proposed in this paper. This technique makes use of the constraint relationship between symbols to achieve high spectral efficiency using BPSK modulation input. Moreover, the performance of the OVTDM is better than that of QAM under the condition of the same spectral efficiency. The scheme obtains the optimal coding gain because it fully utilizes the coding constraints formed naturally. Simulation results show that the advantage of OVTDM over QAM becomes more and more obvious with the increase of the spectral efficiency.