Lattice reduction assisted linear detection method in generalized spatial modulation
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A generalized spatial modulation and linear detection technology, which is applied in the field of linear detection assisted by lattice-based reduction in generalized spatial modulation, can solve problems such as not meeting LR requirements
Inactive Publication Date: 2017-09-08
HARBIN INST OF TECH
View PDF7 Cites 6 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] The purpose of the present invention is to solve the problem that the existing V-BLAST linear detection process cannot be directly used in GSM and the traditional QAM modulation does not meet the LR requirements, and propose a lattice-based reduction-assisted linear detection method in generalized spatial modulation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach 1
[0033] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the specific process of a lattice-based reduction-assisted linear detection method in generalized spatial modulation in this embodiment is as follows:
[0034] Since MMSE equalization can be written in the form of ZF equalization under a certain matrix transformation, ZF equalization represents linear equalization in the following.
[0035] Step 1. Set an LR-assisted linear detection 8-QAM constellation diagram in GSM. The 8-QAM constellation diagram includes quadrature branch and in-phase branch. There are 9 grid points on the coordinate axes of quadrature branch and in-phase branch. : (-1,1), (0,1), (1,1), (-1,0), (0,0), (1,0), (-1,-1), (-1 ,0), (-1,1), where (0,0) is the constellation point adopted by the inactive antenna, and other constellation points are selected by the active antenna according to the bit content of the modulation symbol information; for example:
[0036] ...
specific Embodiment approach 2
[0045] Embodiment 2: This embodiment differs from Embodiment 1 in that: the LR algorithm in the step 2 uses a complex LLL algorithm; the LLLs are A.K. Lenstra, H.W. Lenstra, and L. Lovász.
[0046] Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0047] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the new channel matrix H obtained according to step two in step three LR Perform ZF equalization on the received signal y to obtain an intermediate estimate The specific process is:
[0048]
[0049] in Indicates rounding each dimension component of the vector; for H LR The conjugate transpose of ; * is the conjugate transpose.
[0050] Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a lattice reduction assisted linear detection method in generalized spatial modulation. The invention relates to a lattice reduction assisted linear detection method in generalized spatial modulation. The invention aims to solve the problems that the linear detection process of existing V-BLAST (Vertical Bell Labs Layered Space-Time) cannot be directly used for GSM (Generalized Spatial Modulation) and conventional QAM (Quadrature Amplitude Modulation) does not meet the LR (Lattice Reduction) requirement. The lattice reduction assisted linear detection method has the specific process of 1, setting a LR assisted linear detection 8-QAM constellation diagram in the GSM; 2, obtaining a new channel matrix HLR and a unimodular matrix T; 3, obtaining an intermediate estimated value (with reference to the specification); 4, according to the unimodular matrix T obtained in the step 2 and the intermediate estimated value obtained in the step 3, calculating out an estimated value (with reference to the specification) of a transmission symbol X; 5, obtaining a spatial symbol estimated value (with reference to the specification); and 6, detecting out a modulation signal symbol (with reference to the specification) from the estimated value (with reference to the specification) of the transmission symbol X, and according to the spacial symbol estimated value (with reference to the specification) and the modulation signal symbol (with reference to the specification), completing lattice reduction assisted linear detection in the generalized spatial modulation. The lattice reduction assisted linear detection method disclosed by the invention is used for the field of wireless communication signal detection.
Description
technical field [0001] The invention relates to a lattice reduction assisted linear detection method in generalized space modulation. Background technique [0002] Spatial modulation (SM) technology is a very promising MIMO transmission technology in future mobile communication networks. This technique can meet communication system throughput requirements with high power efficiency and low complexity. Compared with the traditional MIMO system, the SM data stream bits are divided into two parts: spatial information bits and modulation symbol information bits. When using the channel to send information each time, the antenna serial number to be activated is determined according to the spatial information bits, and then the number of antennas to be activated is determined according to the modulation symbol bits. for amplitude and phase modulation. In the SM system, only one radio frequency link is required for each communication, which not only reduces the hardware cost, but ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more