Research And Simulation Of Physical Uplink Control Channel Based On LTE-Advanced System

With the deep development of wireless communication system in thirty years,people put forward higher requrements to communication technology, in order toemphasize the convenience of the channels, the richness of species and the agility oftiming. So LTE(Long Term Evolution) is the most advanced technology now, whichcan reduce the complexity of the system and system delay, increase data rate andsystem capacity. And LTE-Advanced, as the evolution of LTE, increases theperformance of the mobile communication system through the new technology suchas carrier aggregation、enhanced MIMO、relay and comp.As one of the most significant uplink physical channel in LTE-Advanced, thePUCCH(physical uplink control channel) carries the control message of uplink, whichcan support the transportation of uplink and downlink channels. The schedulingmessages cannot operate until the control messages decode correctly, which is veryimportant in LTE system. PUCCH is a narrow band with code multiplex, theinterference of the users is the important reason which has a great affect to the systemperformance. So this article analyzes the key technology of PUCCH and the basictechnology principle. The related work is summarized as follows:(1) According to the protocol of3GPP physical layer, this article researches anddesigns the scheme of LTE-A PUCCH sender, including the channel coding、modulation、generating ZC sequence、data modulation、spreading、transport diversityand generating SC-FDMA symbol. Focus on research the transport diversity, which isto avoid inter-cell interference from the PUCCH. There are four schme, it is STBC、SFBC、FSTD、SORTD.(2) Accord to the scheme of sender, this article researches and designs the schemeof receiver, including front-end processing、 the resource remapping、 channelestimation、signal detection、despreading、descrambling、demodulation、ACK/NACKdetection and channel decoding. Focus on research the channel estimation and signaldetection algorithm of the receiver, and then Put forward an improved detectingalgorithm based on traditional detecting algorithm, which takes advantages of sortingserial interference cancellation algorithm.(3)Arithmetic simulation based on PUCCH, including the basic procceding of thesender and the reciver, in order to detect the system performance. It mainly includesmodulation serious kinds of the trsport diversity, getting the advantage anddisadvange so that we can get the best scheme of transmit diversity of PUCCH. Then use different channel estimation and signal detection algorithm to compare andanalyze the performance. And approve the feasibility of the improved algorithmthrough modulating the performance of the algorithm.