| dc.description.abstract | Recently there is a new noncoherent trellis codes, called differential trellis coded modulation used in the different states differ in different coding and split by collection designed trellis codes, in order to achieve better error performance. In this thesis, this incoherent trellis extends to multiple antennas system called differential space-time trellis code, first we STBC as an example, the 8PSK, 32 group may make a collection of signal segmentation, then do the fence in the state 4,8,16 difference coding, and several different states from the trellis code to do the analysis, compared with the original uncoded modulation differential space-time,
a larger minimum noncoherent distance, and obtained a computer program simulation results also show a better performance of its errors. In addition, we also use the super-orthogonal space-time trellis codes, and make the collection division and in different states do differ coding, depending on the distance analysis, we found differential quadrature empty super state in 4,8 differential space-time fence gate code and 8,16 state trellis codes when the same minimum noncoherent distance, and simulation results show that there is very close to the error performance. | en_US |