Overlapping Multiplexing Research In Independent Source

As we all know, the validity and reliability are two important indicators for the communication system, in order to improve the effectivenesswe, we can use multiple access technologies, and we can use signal detection and decoding algorithm to improve the reliability. The overlapping ideas is an innovation to the existing technologies, it not only has a higher spectrum efficiency, and also ideal in reliability. The papers do further research on OVTDM and OVCDM on the basis of previous.The first chapter introduces the development of the mobile communication system in recent decades, and the error probability decoding development. Then there is the arrangement of the paper.The second chapter introduces the basic principle of overlapping ideas proposed by the Professor Li, as well as OVTDM basic principles introduced the power spectral density and channel capacity. Detailed description then done on the performance of different coding matrix OVCDM and cascaded OVCDM.The third chapter design a product structure OVCDM (P-OVCDM) program, for the decoding algorithm, we design a known pilot decoding algorithm and a decoding algorithm for a single/two directions, and the maximum measure decoding algorithm. We can see the four algorithms has its own advantages and disadvantages from the simulation results, and there is a long way to go in the decoding algorithm.The Fourth chapter introduces the basic principles of Turbo codes, encoding and decoding program, and then introduced in the P-OVTDM and S-OVTDM, In addition, the paper also design Turbo-P-OVTDM and Turbo-S-OVTDM system.The fifth chapter are a summary of the content and the vision for the future.