CN106911375A - 低复杂度差分检测方法 - Google Patents
低复杂度差分检测方法 Download PDFInfo
- Publication number
- CN106911375A CN106911375A CN201710091442.5A CN201710091442A CN106911375A CN 106911375 A CN106911375 A CN 106911375A CN 201710091442 A CN201710091442 A CN 201710091442A CN 106911375 A CN106911375 A CN 106911375A
- Authority
- CN
- China
- Prior art keywords
- antenna
- detecting method
- symbol
- detection
- alignment matrix
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0652—Feedback error handling
- H04B7/0656—Feedback error handling at the transmitter, e.g. error detection at base station
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Quality & Reliability (AREA)
- Electromagnetism (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
本发明属于无线通信技术领域,具体涉及差分空间调制(differential spatial modulation,DSM)通信系统中的一种信号检测方法。本发明提出一种低复杂度差分检测方法。相比于传统的逐块搜索的ML检测,本发明提出的检测算法采用逐符号检测。具体来说,首先跟传统的空间调制检测一样,先在每个时隙分别进行估计,得到每个时隙激活天线的序号和相应的符号。然后,这Nt个估计的天线索引共同决定激活的天线矩阵的索引。
Description
技术领域
本发明属于无线通信技术领域,具体涉及差分空间调制(differential spatialmodulation,DSM)通信系统中的一种信号检测方法。
背景技术
对于DSM系统,传输的比特分别用于调制天线排列矩阵和激活天线上传输的L-PSK符号。理论上来说,所有的可能的天线排列矩阵有Nt!个,但是实际上只能选用其中个用来调制信息,剩余的天线排列矩阵视为无效,其中,表示取整函数。天线排列矩阵Aq(q=1,2,...,Q)是Nt×Nt的满秩矩阵,Aq的每一列都只有一个非零元素。因此,每个天线排列矩阵Aq一对一地对应一个天线序列向量其中(j=1,2,...,Nt)代表着Aq的第j列元素中非零元素的位置。Q个天线排列矩阵Aq(q=1,2,...,Q)对应Q个天线序列向量
在每Nt个时隙里,发送一个Nt×Nt的空时矩阵Xk,传递B=log2(Q)+Ntlog2(L)比特的信息。其中,B1=log2(Q)个比特用于在Q个可能的天线排列矩阵中选择一个Aq,另外B2=Ntlog2(L)个比特用于调制Nt个L-PSK符号所以,得到第k个发送矩阵为:其中,diag[·]表示将向量对角化为矩阵。
DSM系统的差分调制为:Sk=Sk-1Xk,其中,初始化S0为(Nt×Nt)的对角矩阵。
在接收端,收到的第k个接收矩阵表示为:Yk=HkSk+nk,其中,和分别表示信道矩阵和噪声矩阵,它们的元素分别满足和的复高斯分布。假定信道参数在Nt个时隙里保持不变,有Hk-1≈Hk。收到的Yk可以表示为:Yk=Yk- 1Xk+Nk,其中,Nk=nk-nk-1Xk。
DSM的ML检测可以表示为:其中,χ是所有有效的DSM发射矩阵的集合,随着Nt指数增长。因此,当DSM系统的传输速率较高时,ML检测并不实用。
发明内容
本发明提出一种低复杂度差分检测方法。相比于传统的逐块搜索的ML检测,本专利提出的检测算法采用逐符号检测。具体来说,首先跟传统的空间调制检测一样,先在每个时隙分别进行估计,得到每个时隙激活天线的序号和相应的符号然后,这Nt个估计的天线索引共同决定激活的天线矩阵的索引。
低复杂度差分检测方法,包括以下步骤:
S1、对于i=1,2,...,Nt,利用HL-ML检测算法得到Nt个初步估计的序号和符号 最终可以得到和其中, 是Yk的第i列,是Yk-1的第li列,是数字解调程序;
S2、对于所有可能的天线索引向量依次与S1得到的进行比较,记Nq为与Lq的相同元素数目,可以得到N=[N1,...,Nq,...,NQ],将所述N中的元素按照降序排列,得到其中,和分别是N中的最大元素和最小元素,记mq为与相应的天线排列矩阵的序号,得到m=[m1,...,mq,...,mQ];
S3、如果认为得到的有效,与之相应的即为最终的检测结果;
S4、如果认为得到的无效,定义QM作为N中的最大元素的数量,选择m=[m1,...,mq,...,mQ]中的前P种有效的天线排列矩阵进行进一步的检测,其中,P≥QM, 是天线排列矩阵Aq对应的天线索引向量Lq的第j个元素,j=1,2,...,Nt。
本发明的有益效果是:
本发明结合HL-ML检测和ML检测,首先通过逐时隙进行HL-ML检测得到激活天线和传输符号的初步结果,减少计算复杂度,在初步检测结果不理想的情况下,扩大搜索空间进行进一步的检测以提高检测精度。本发明相对于ML检测而言,大大缩小了最大后验概率检测的搜索空间,从而大大降低了运算复杂度;并可达到与ML概率检测近似的检测精度。
附图说明
图1是不同天线配置下的初步检测得到的天线序号向量有效的概率随着信噪比的变化。图(a)是Nt=4,Nr=4,图(b)是Nt=6,Nr=6。
图2是不同天线配置下不同检测算法的性能对比图。图(a)是Nt=4,Nr=4,图(b)是Nt=6,Nr=6。
图3是不同天线配置下不同检测算法的计算复杂度对比图。图(a)是Nt=4,Nr=4,图(b)是Nt=6,Nr=6。
具体实施方式
下面将结合实施例和附图,对本发明方法进行进一步说明。
本发明结合HL-ML检测和ML检测,首先通过逐时隙进行HL-ML检测得到激活天线和传输符号的初步结果,减少计算复杂度,在初步检测结果不理想的情况下,扩大搜索空间进行进一步的检测以提高检测精度。本发明相对于ML检测而言,大大缩小了最大后验概率检测的搜索空间,从而大大降低了运算复杂度;并可达到与ML概率检测近似的检测精度。
S1、对于i=1,2,...,Nt,利用HL-ML检测算法得到Nt个初步估计的序号和符号 最终可以得到和其中, 是Yk的第i列,是Yk-1的第li列,是数字解调程序;
S2、对于所有可能的天线索引向量依次与S1得到的进行比较,记Nq为与Lq的相同元素数目,可以得到N=[N1,...,Nq,...,NQ],将所述N中的元素按照降序排列,得到其中,和分别是N中的最大元素和最小元素,记mq为与相应的天线排列矩阵的序号,得到m=[m1,...,mq,...,mQ];
S3、如果认为得到的有效,与之相应的即为最终的检测结果;
S4、如果认为得到的无效,需要进行进一步的检测。这种情况下N中的最大元素可能不止一个。定义QM作为N中的最大元素的数量,选择m=[m1,...,mq,...,mQ]中的前P种有效的天线排列矩阵进行进一步的检测,其中,P≥QM, 是天线排列矩阵Aq对应的天线索引向量Lq的第j个元素,j=1,2,...,Nt。
图1是不同天线配置下的初步检测得到的天线序号向量有效的概率随着信噪比的变化。图(a)是Nt=4,Nr=4,图(b)是Nt=6,Nr=6。图2和图3中ML表示传统的ML检测方法,LBD表示本发明提供的低复杂度检测方法。图2是不同天线配置下不同检测算法的性能对比图。图(a)是Nt=4,Nr=4,图(b)是Nt=6,Nr=6。图3是不同天线配置下不同检测算法的计算复杂度对比图。图(a)是Nt=4,Nr=4,图(b)是Nt=6,Nr=6。
Claims (1)
1.一种低复杂度差分检测方法,其特征在于,包括以下步骤:
S1、对于i=1,2,...,Nt,利用HL-ML检测算法得到Nt个初步估计的序号和符号 最终可以得到和其中, 是Yk的第i列,是Yk-1的第li列,是数字解调程序;
S2、对于所有可能的天线索引向量依次与S1得到的进行比较,记Nq为与Lq的相同元素数目,可以得到N=[N1,...,Nq,...,NQ],将所述N中的元素按照降序排列,得到其中,和分别是N中的最大元素和最小元素,记mq为与相应的天线排列矩阵的序号,得到m=[m1,...,mq,...,mQ];
S3、如果认为得到的有效,与之相应的即为最终的检测结果;
S4、如果认为得到的无效,定义QM作为N中的最大元素的数量,选择m=[m1,...,mq,...,mQ]中的前P种有效的天线排列矩阵进行进一步的检测,其中,P≥QM, 是天线排列矩阵Aq对应的天线索引向量Lq的第j个元素,j=1,2,...,Nt。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710091442.5A CN106911375A (zh) | 2017-02-21 | 2017-02-21 | 低复杂度差分检测方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710091442.5A CN106911375A (zh) | 2017-02-21 | 2017-02-21 | 低复杂度差分检测方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN106911375A true CN106911375A (zh) | 2017-06-30 |
Family
ID=59209237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710091442.5A Pending CN106911375A (zh) | 2017-02-21 | 2017-02-21 | 低复杂度差分检测方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106911375A (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108289013A (zh) * | 2018-01-05 | 2018-07-17 | 中国计量大学 | 一种基于补码技术的差分空间调制协作系统抗干扰方法 |
CN109547077A (zh) * | 2019-01-22 | 2019-03-29 | 重庆京东方智慧电子系统有限公司 | 一种无线通信方法及通信设备 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090097584A1 (en) * | 2006-03-17 | 2009-04-16 | Hitoshi Takai | Wireless transmission system, wireless transmission method, and wireless station and transmitting station used therein |
CN104298649A (zh) * | 2014-09-24 | 2015-01-21 | 江苏中兴微通信息科技有限公司 | 一种低复杂度的快速并行矩阵求逆方法 |
CN104660379A (zh) * | 2015-02-04 | 2015-05-27 | 电子科技大学 | 一种基于可靠性判决的空间调制检测方法 |
-
2017
- 2017-02-21 CN CN201710091442.5A patent/CN106911375A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090097584A1 (en) * | 2006-03-17 | 2009-04-16 | Hitoshi Takai | Wireless transmission system, wireless transmission method, and wireless station and transmitting station used therein |
CN104298649A (zh) * | 2014-09-24 | 2015-01-21 | 江苏中兴微通信息科技有限公司 | 一种低复杂度的快速并行矩阵求逆方法 |
CN104660379A (zh) * | 2015-02-04 | 2015-05-27 | 电子科技大学 | 一种基于可靠性判决的空间调制检测方法 |
Non-Patent Citations (1)
Title |
---|
LIXIA XIAO 等: ""A Low-Complexity Detection Scheme for Differential Spatial Modulation"", 《IEEE COMMUNICATIONS LETTERS》 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108289013A (zh) * | 2018-01-05 | 2018-07-17 | 中国计量大学 | 一种基于补码技术的差分空间调制协作系统抗干扰方法 |
CN108289013B (zh) * | 2018-01-05 | 2021-01-08 | 中国计量大学 | 一种基于补码技术的差分空间调制协作系统抗干扰方法 |
CN109547077A (zh) * | 2019-01-22 | 2019-03-29 | 重庆京东方智慧电子系统有限公司 | 一种无线通信方法及通信设备 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Ali et al. | Unsupervised feature learning and automatic modulation classification using deep learning model | |
CN101268647B (zh) | 用于处理来自多个源的通信的装置和方法 | |
CN108989262B (zh) | 一种基于apsk调制的低复杂度非相干空间调制检测方法 | |
US8488721B2 (en) | Adaptive QRD-M algorithm based signal detecting method by using constellation set grouping in spatial multiplexing multiple-input multiple-output system | |
CN111628833B (zh) | 基于卷积神经网络的mimo天线数目估计方法 | |
JP5854694B2 (ja) | 受信装置、受信方法、及び受信プログラム | |
JP2001298387A (ja) | ユニタリ時空信号コンステレーションを用いた無線通信の方法 | |
Park et al. | Learning how to demodulate from few pilots via meta-learning | |
CN106911375A (zh) | 低复杂度差分检测方法 | |
KR102107571B1 (ko) | 깊은 신경망을 이용한 대용량 mimo 신호 검출 방법 및 장치 | |
Ye et al. | Bilinear convolutional auto-encoder based pilot-free end-to-end communication systems | |
Zhang et al. | Transformer-based detector for OFDM with index modulation | |
KR102262392B1 (ko) | 깊은 신경망을 이용한 대용량 mimo 신호 검출 방법 및 장치 | |
Mao et al. | Deep learning in physical layer communications: Evolution and prospects in 5G and 6G networks | |
Ahn et al. | Deep neural network-based joint active user detection and channel estimation for mMTC | |
CN114337883A (zh) | 协方差矩阵Cholesky分解的CNN协作频谱感知方法及系统 | |
CN113938234A (zh) | 一种低复杂度稀疏化大规模mimo检测方法 | |
Kim et al. | Symbol decision method of color-independent visual-MIMO system using a dynamic palette | |
Liu et al. | Performance of deep learning for multiple antennas physical layer network coding | |
Kang et al. | Deep Learning-Based Bootstrap Detection Scheme for Digital Broadcasting System | |
US8081577B2 (en) | Method of calculating soft value and method of detecting transmission signal | |
CN113411282B (zh) | 一种基于任意阶空时分组码的mimo系统信号检测方法 | |
Duan et al. | A model‐driven robust deep learning wireless transceiver | |
Omondi et al. | Variational autoencoder-enhanced deep neural network-based detection for MIMO systems | |
CN115499278B (zh) | 基于轻量级神经网络的mimo信号调制识别方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170630 |
|
WD01 | Invention patent application deemed withdrawn after publication |