Design of an adaptive precoding/STBC baseband transceiver on a reconfigurable architecture  

一种应用于可重构结构的自适应预编码/空时分组编码基带收发系统设计（英文）

作　　者：Ye Yunfei Wu Ning Ge Fen Zhou Fang 

机构地区：[1]CoUege of Electrical and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China [2]College of Innovation, Nanjing Institute of Railway Technology, Nanjing 210031, China

出　　处：《Journal of Southeast University(English Edition)》2017年第3期266-272,共7页东南大学学报（英文版）

基　　金：The National Natural Science Foundation of China(No.61376025);the Industry-Academic Joint Technological Innovations FundP roject of Jiangsu(No.BY2013003-11);the Scientific Innovation Research of College Graduates in Jiangsu Province(No.KYLX_0273)

摘　　要：Precoding and space-time block coding （STBC）techniques using the uniform channel decomposition （UCD）are proposed to improve the bit error rate （BER） of themultiple-antenna communication system, but at a cost of areduced data rate. In order to achieve a higher overall systemperformance, a novel adaptive transceiver architecture whichflexibly combines both UCD and UCD ＋ STBC technologies isproposed. The channel state information （CSI） feedback pathwas added to the precoder to select which coding method wasto be used, i.e. UCD alone or UCD ＋ STBC. With thesmaller constellation sizes, Matlab simulation results showthat, the adaptive transceiver architecture will select the UCD-only mode under the higher SNR conditions in order to achievea higher bit rate. The UCD ＋ STBC mode will be selectedunder the lower SNR conditions （e. g., SNR 〈 10 dB） inorder to maintain good BER performance at the cost of areduced data rate. This architecture was implemented andverified using both UMC 0.18 ASIC process technology and aXilinx xc4vlx Virtex-4 FPGA at 150 MHz. The simulationresults demonstrate that the required number of reconfigurablearithmetic unit slices grows linearly with the channel matrixsize, while the number of adder array unit and reconfigurablelogic unit slices increases slightly with the constellation size.Precoding and space-time block coding( STBC)techniques using the uniform channel decomposition( UCD)are proposed to improve the bit error rate( BER) of the multiple-antenna communication system, but at a cost of a reduced data rate. In order to achieve a higher overall system performance, a novel adaptive transceiver architecture which flexibly combines both UCD and UCD + STBC technologies is proposed. The channel state information( CSI) feedback path was added to the precoder to select which coding method was to be used, i. e. UCD alone or UCD + STBC. With the smaller constellation sizes, Matlab simulation results showthat, the adaptive transceiver architecture will select the UCDonly mode under the higher SNR conditions in order to achieve a higher bit rate. The UCD + STBC mode will be selected under the lower SNR conditions( e. g., SNR < 10 dB) in order to maintain good BER performance at the cost of a reduced data rate. This architecture was implemented and verified using both UMC 0. 18 ASIC process technology and a Xilinx xc4 vlx Virtex-4 FPGA at 150 MHz. The simulation results demonstrate that the required number of reconfigurable arithmetic unit slices grows linearly with the channel matrix size, while the number of adder array unit and reconfigurable logic unit slices increases slightly with the constellation size.

关 键 词：PRECODING uniform channel decomposition (UCD) space-time block coding (STBC) ADAPTIVE transceiver reconfigurable BASEBAND architecture 

分 类 号：N0[自然科学总论—科学技术哲学]