The Design And Implementation Of Receiver Of Uplink Control Channel Of TD-LTE-A

TD-LTE-Advanced is the long term evolution of TD-LTE, 3GPP organization has formulated the standard Release10 of TD-LTE-Advanced. In TD-LTE-Advanced system, PUCCH is in charge of transmission of uplink's control signaling and directly impact whether the data can be transmitted and received in PUSCH channel. So the study of PUCCH receiving algorithm of PUCCH of TD-LTE-Advanced is very important.The paper designs baseband receiver of physical uplink control channel(PUCCH) and implement of fixed-point algorithms in TD-LTE-Advanced system. According to the relevant 3GPP protocol standards, the thesis elaborates design strategy from the level of system for PUCCH. it also introduces channel's structure of PUCCH and common channel estimation algorithms such as LS, MMSE, linear interpolation and wiener interpolation. Through simulation, the complexity and code error rate of the above mentioned algorithms are compared. The simulation results show: 1).when LS algorithm is applied to channel estimation of reference signal, computation complexity can be reduced markedly while system requirement can be satisfied. 2).when the two-dimensional wiener interpolation algorithm is applied to channel estimation of data symbol, transmission rate of data symbols can be reduced and the performance on code error rate can be improved. These simulation results can help us to optimize the design of PUCCH baseband receiver from the theoretical direction.In TD-LTE-Advanced system, According to the type of transmission uplink control signaling, PUCCH channel is divided into seven types, which is PUCCH format 1/1a/1b/2/2a/2b/3. This thesis provides baseband receiver algorithm for PUCCH in TD-LTE-Advanced system and utilize relate software to simulate the performance of code error rate in transmitting-receiving link system. Through comparing transmission performance in the cases of single antenna and multiple antennas in transmitters, the simulation results show that transmitting diversity can improve the performance of code error rate. Furthermore, combining with float-point receiver algorithm, the thesis construct a TD-LTE-A physical lay uplink system platform in UNIX system. Through quantifying the receiving algorithm, the thesis provides the fixed-point arithmetic implementations on the DSP platform, and exploits the relationship between signal-noise rate and time on the same platform to obtain the system requirement of fixed-point algorithm.