Selection method of roll-off coefficient of pulse shaping filter in generalized frequency division multiplexing technique based on scanning and scaling
A generalized frequency division multiplexing and pulse shaping technology, applied in baseband systems, baseband system components, shaping networks in transmitters/receivers, etc., can solve the problem of not being able to fully exert the functions of GFDM systems, and achieve fast convergence speed , the effect of high service quality
Active Publication Date: 2021-08-31
TIANJIN NORMAL UNIVERSITY
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, there is still a lack of simple and effective roll-off coefficient optimization options, and the functions of the GFDM system cannot be fully utilized in practical applications.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] A method for selecting a roll-off coefficient of a pulse-shaping filter in a generalized frequency-division multiplexing technology based on scanning and scaling, comprising the following steps:
[0024] Step 1: Configure the scanning and scaling method and the GFDM system. The specific configuration parameters are shown in Table 1. The feasible space of the roll-off coefficient α is Ω=[0, 1], and the maximum number of scanning layers is l max is 2, and the number of scanning samples per layer Ns is 11;
[0025] Table 1 embodiment parameter configuration
[0026] parameter value Feasible space Ω for roll-off coefficient α [0，1] The maximum number of scanning layers l max
2 Number of scan samples per layer Ns 11 Maximum number of iterations MFE 50 Modulation method μ 4(QAM) pulse shaping filter RRC or Xia1 Number of subcarriers K 64 Number of sub-symbols M 9 Cyclic prefix length Ncp 16 channel ...
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 method for selecting the roll-off coefficient of the pulse shaping filter in the generalized frequency division multiplexing technology based on scanning and zooming. The scanning operation is to sample the value range of the roll-off coefficient α, and the corresponding Pulse shaping filter for test evaluation. The scaling operation is to reduce the value range of α or enlarge the value range of α according to the evaluation results of the sampling points. Let α * Indicates the optimal roll-off coefficient. If the range of α is reduced every time, it is α * The closure of the method converges to a small neighborhood containing the optimal solution. The smaller the neighborhood, the smaller the impact of the roll-off coefficient within its range on the performance of the GFDM system. If it is small enough, it can be regarded as the optimal solution . If after the shrinking operation, the candidate neighborhood does not contain α * , after the method converges to the local optimum, the enlargement operation can realize the movement and expansion between the neighborhoods, so that the method finally converges to α * . This method can select appropriate roll-off coefficients for different pulse shaping filters to achieve a lower symbol error rate.
Description
technical field [0001] The invention belongs to the technical field of generalized frequency division multiplexing, and in particular relates to a method for selecting a roll-off coefficient of a pulse shaping filter in the generalized frequency division multiplexing technology based on scanning and zooming. Background technique [0002] Wireless communication is moving towards the fifth generation of mobile communication technology (5G). Many countries have set up 5G technology promotion groups to conduct research and development of next-generation communication technologies and standards, striving to achieve faster, more convenient and more stable service quality. Generalized Frequency Division Multiplexing (GFDM) is one of the multi-carrier alternatives for 5G. Compared with Orthogonal Frequency Division Multiplexing (OFDM), it has high spectral efficiency, less out-of-band power leakage, and no synchronization of subcarriers. advantage. [0003] In GFDM, the transmitted...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03G06F30/20
CPCG06F30/20H04L25/03828
Inventor 张秀张新
Owner TIANJIN NORMAL UNIVERSITY