Optimized power distribution method suitable for MIMO and OFDM communication systems

A technology for optimizing power and allocation methods, applied in the field of communication, can solve problems that affect channel error correction coding performance and model power allocation problems are not considered, and achieve the effects of enhancing error correction performance, compensating for performance deterioration, and improving efficiency and reliability

Active Publication Date: 2022-02-15
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the gradual complexity and flexibility of modern mobile communication protocols represented by cellular mobile communication, in order to adapt to more complex application scenarios, the distribution of channel coding and MIMO precoding is required to be more diversified, which will cause different Differential eff

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
  • Optimized power distribution method suitable for MIMO and OFDM communication systems
  • Optimized power distribution method suitable for MIMO and OFDM communication systems
  • Optimized power distribution method suitable for MIMO and OFDM communication systems

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Originally, based on the data transmission and reception process of the present invention, specific includes:

[0031] Step 1. Select the LDPC code for the code length 1024, the degree distribution of its rows and columns is

[0032] λ (x) = 0.45x + 0.337X2 + 0.213x 5

[0033] ρ (x) = 0.511x 4 + 0.431X 5 + 0.058X 6

[0034] Where D v = 6, D c = 7;

[0035] Step 2. BPSK modulation is performed on the encoded 1024 symbols;

[0036] Step 3. The time frequency and air dimensions of the selected frame format are n t = N f = 16, N s = 4, according to the channel status information sent by the receiver, expand the channel information array H by linear interpolation m For each set of time-frequency signals, the precoding method of singular value decomposition, SVD is used, and the corresponding precoding matrix W, a total of 256 precoding matrices, and obtaining the 256 group pre-coded Channel power gain, there are 4 channel power gains in each group, followed ...

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

No PUM Login to view more

Abstract

The invention belongs to the technical field of communication, and particularly relates to an optimized adaptive power distribution method based on irregular LDPC code transmission in MIMO and OFDM communication systems. According to the method, under the condition that the average power of each transmitting antenna of the MIMO system is kept unchanged, an optimized power distribution value is calculated theoretically by using a channel condition obtained by estimating channel state information and cooperating with a corresponding precoding scheme, and the transmitting power of a symbol subjected to LDPC coding and modulation is adjusted by using the power distribution value, therefore, the error correction performance of the LDPC code under the transmission model is optimized, so that the transmission efficiency is improved, and the transmission reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to an optimal self-adaptive power allocation method when transmitting based on irregular LDPC codes in MIMO and OFDM communication systems. Background technique [0002] Low-density parity-check codes (Low-density parity-check codes, LDPC) is a linear block code, proposed by R.Gallager in 1962 (R.Gallager.Low-density parity-check codes[J].IRETransactions on Information Theory, 1962, 8(1):21-28). In 2001, Mackay et al. re-researched and confirmed that LDPC codes have the performance of approaching the Shannon limit (D.J.C.MacKay and R.M.Neal.Near Shannon limitperformance of low density parity check codes[J].IEE Electron.Lett.,1997,33(6): 457-458.). Subsequently, it attracted the attention of a large number of researchers. Among them, T.J.Richardson proposed that the LDPC code can be theoretically analyzed and optimized using the density evolution theory (T.J.Richardson, R.L.Urb...

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
no application Login to view more
IPC IPC(8): H04L5/00H04L1/00H04B7/0426H04B7/0456
CPCH04L5/0007H04L5/0023H04L5/006H04L1/0061H04B7/0426H04B7/0456Y02D30/70
Inventor 林灯生陈文楷邹亚梅
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap