Research On HOM Scheme Desioning And PAPR Technology Of Precoded EGPRS2

Precoded EGPRS2which bases on precoded technique was approved as EGPRS2evolution standard by GERAN group in2010. It attracts major companies such asEricsson, HuaWei, Nokia, Marvell etc., and they made contribution to the evolution ofPCE2down link. In the view of the above background, this thesis analyses the problemsbrought about by the introduction of precoded schem and gives the correspondingsolution, such as new coding schem designing and PAPR solution.In the view of link simulation, a partition region decision of symmetry andnon-symmetry constellation is advanced. Moreover, two CSI recover schemes arediscussed, each performance is simulated in six paths Tux channel, and gets the feasiblescheme for the PCE2system. Meanwhile, performances of the PCE2link are simulatedin the thesis.In the new coding schem aspect, considering the tap model of OFDM system andthe characteristic of GSM channel, the thesis put forward two schemes, Zero PaddedHigh Order Modulation and Repeat Padded High Order Modulation, to resolve theuneven characteristic of channel. It also ameliorates of ZP-HOM and RP-HOM schems.Such as, it improves the DFT size to reduce the DFT and IDFT realization complexitybut nearly sacrifices the performance in ZP-HOM, it also redesign the position of thepilot in RP-HOM to get more superior performance.In the PAPR respect, the PAPR of the system is big due to the introduction ofOFDM, it make the amplifier components difficulty to realize. This thesis advances aPWPC (PTS with Pilot and Clipping) scheme to solve the PAPR issue. Compared withthe Ericsson PAPR solution, the PWPC can achiece the PAPR goal with lowerperformance loss.