计算机科学 ›› 2025, Vol. 52 ›› Issue (6A): 240900128-4.doi: 10.11896/jsjkx.240900128
张璐麟, 郑兴, 彭宇辉, 项楠天, 施昌涵, 苏江涛
ZHANG Lulin, ZHENG Xing, PENG Yuhui, XIANG Nantian, SHI Changhan, SU Jiangtao
摘要： 多输入多输出系统(MIMO)是5G通信的关键技术,为无线通信提供了空间分集和空间复用的能力,可以大幅度提高无线通信的性能。但是,该技术也使MIMO的信号检测变得十分复杂。为了降低MIMO信号检测复杂度,提出幅值-相位差分联合调制(A-DPM)方案。A-DPM利用相位差和幅值携带信息,系统通过MIMO预编码和最大比合并(MRC)使接收端可以获得最大的信号功率,而相位差分消除了多径信道和奇异值分解(SVD)预编码对符号造成的相位旋转,同时使载波的残余频率偏移造成的时变的相位旋转变为非时变相位旋转。因此,A-DPM接收端不需要进行复杂的MIMO信道估计,简化了接收端信号检测过程。在多径瑞利信道以及存在残余频率偏移和采样周期偏移的环境下,仿真验证证实了多天线A-DPM方案具有空间分集效果,且误码率性能优于空时分组码(STBC)系统,解调复杂度低于STBC系统。
中图分类号:
| [1]EMRE TELATAR.Capacity of Multi-antenna Gaussian Channels[J].European Transactions on Telecommunications,1999,10(6):585-595. [2]FOSCHINI G J.Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas[J].Bell Labs Technical Journal,1996,1(2):41-59. [3]ZHANG J X,JIANG J,ZHANG X F,et al.B MIMO Communication System Based on MATLAB[J].Journal of Shanxi Datong University(Natural Science Edition),2023,39(4):11-16,28. [4]PROAKIS J G,SALEHI M.Digital communications[M].McGraw-hill,2008. [5]HANZO L,ALAMRI O,EL-HAJJAR M,et al.Near-capacity multi-functional MIMO systems:sphere-packing,iterative detection and cooperation[M].John Wiley & Sons,2009. [6]FOSCHINI G J.Layered space-time architecture for wirelesscommunication in a fading environment when using multi-element antennas[J].Bell labs Technical Journal,1996,1(2):41-59. [7]ZHANG W X.Research on The Impact of Correlation on Channel Capacity of MIMO Wireless Communication Systems[D].Nanjing:Nanjing University of Information Science and Technology,2011. [8]NGUYEN T N,LAI X,TRAN B,et al.Performance analysis of the VBLAST algorithm for MIMO-OFDMA systems on spatial correlated channels[C]//2014 International Conference on Computing,Management and Telecommunications(ComManTel).IEEE,2014:146-151. [9]TOMURA K,SANADA Y,KOBAYASHI Y.MIMO detection with block parallel Gibbs sampling and maximum ratio combining[C]//2020 IEEE Region 10 Conference(TENCON).IEEE,2020:496-500. [10]BRENNAN D G.Linear diversity combining techniques[J].Pro-ceedings of the IEEE,2003,91(2):331-356. [11]FINCKE U,POHST M.Improved methods for calculating vectors of short length in a lattice,including a complexity analysis[J].Mathematics of Computation,1985,44(170):463-471. [12]WANG B,WU J,YIN H,et al.On maximum-likelihood detection via improved sphere decoding[C]//2022 31st Wireless and Optical Communications Conference(WOCC).IEEE,2022:47-51. [13]ABDZADEH-ZIABARI H,SHAYESTEH M G.Robust timing and frequency synchronization for OFDM systems[J].IEEE Transactions on Vehicular Technology,2011,60(8):3646-3656. [14]VAN DE BEEK J J,SANDELL M,BORJESSON P O.ML estimation of time and frequency offset in OFDM systems[J].IEEE Transactions on Signal Processing,1997,45(7):1800-1805. [15]YAO Y,GIANNAKIS G B.Blind carrier frequency offset estimation in SISO,MIMO,and multiuser OFDM systems[J].IEEE Transactions on Communications,2005,53(1):173-183. [16]SPETH M,FECHTEL S A,FOCK G,et al.Optimum receiver design for wireless broad-band systems using OFDM.I[J].IEEE Transactions on cCmmunications,1999,47(11):1668-1677. [17]ZHANG D,PAN P,YOU R,et al.SVD-based low-complexity hybrid precoding for millimeter-wave MIMO systems[J].IEEE Communications Letters,2018,22(10):2176-2179. [18]LI T,JIANG L,CHEN B W.A Performance Analysis of Maximal Ratio Combining under Condition of Non Identically Distributed Nakagami-m Fading Channels[J].Journalof Air Force Engineering University(Natural Science Edition),2018,19(6):84-89. |
|
||
首页