Unlock instant, AI-driven research and patent intelligence for your innovation.

Subcarrier mapping method of space-frequency block codes

A technology of sub-carrier mapping and space-frequency grouping, applied in the sub-carrier mapping field of uplink SFBC, can solve the problems of increasing PAPR, destroying single-carrier characteristics, and SFBC being unsuitable for diversity mode, achieving low PAPR and meeting the needs of system design.

Inactive Publication Date: 2010-06-09
ZTE CORP
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the sub-carrier destroys the single-carrier characteristics in the multiple access mode, it significantly increases the PAPR at the UE side, so the existing SFBC is not suitable as an uplink diversity mode

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
  • Subcarrier mapping method of space-frequency block codes
  • Subcarrier mapping method of space-frequency block codes
  • Subcarrier mapping method of space-frequency block codes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention proposes a new SFBC subcarrier mapping method. When performing uplink two-antenna diversity, the symbols sent by one antenna are arranged completely according to the symbols after DFT, and the symbols sent by the other antenna are arranged according to the Fourier transform property. , after performing conjugate operation, reverse order arrangement, cyclic shift and phase rotation operation on the symbols after DFT, the symbol sequence is transmitted through another antenna, wherein the operations have no order relationship, and the phase rotation angles of adjacent symbols in the sequence are different e jhπ , h is an odd number, the number of bits for the cyclic shift is an even number, or no cyclic shift is performed or the number of bits for the cyclic shift is 0.

[0023] The present invention is further illustrated below by specific examples.

[0024] The operation steps of the subcarrier mapping method of SFBC in Embodiment 1 of the present...

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 provides a subcarrier mapping method of space-frequency block codes (SFBC), comprising the following steps of: transmitting a first sign sequence of the space-frequency block codes to be coded through an antenna; carrying out conjugate operation, reverse array, cyclic shift and phase rotation on the first sign sequence to obtain a second sign sequence; and transmitting the second sign sequence through another antenna, wherein various operations have no sequential relationship, the angle difference of the phase rotation of adjacent signs in the sequence is ejhphi, h is odd number and the digit of the cyclic shift is even number. The subcarrier mapping method maintains the single carrier characteristic of transmitting signs, enables the SFBC to achieve low peak-to-average power ratio (PAPR) in the uplink diversity, and meets the design requirement on the system.

Description

technical field [0001] The present invention relates to a long term evolution (Long term evolution, referred to as LTE) system and a long term evolution advanced system (Long term evolution advanced system, referred to as LTE-Advanced), in particular, relates to an uplink SFBC in LTE and LTE-Advanced systems (Space Frequency Block Code, Space Frequency Block Code) subcarrier mapping method. Background technique [0002] In the LTE system, user equipment (User Equipment hereinafter referred to as UE) is limited in power and requires a low peak-to-average power ratio (Peak-to-Average Power Ratio, hereinafter referred to as PAPR). In the LTE standard, the downlink adopts a two-antenna method -----SFBC (Space Frequency Block Code, Space Frequency Block Code). [0003] When SFBC is used in the uplink, the subcarrier mapping method of traditional SFBC in the multiple access mode SC-FDMA (Single Carrier Frequency Division Multiplexing) currently adopted by LTE is as follows: figu...

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): H04L1/06H04L27/26H04L27/38
CPCH04L5/0039H04L27/2621H04L1/0606H04L5/0023H04L27/2602
Inventor 姜静孙云锋于辉
Owner ZTE CORP
PatSnap Eureka logo

PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.

X (Twitter)LinkedInYouTubeSubstack

© 2026 PatSnap. All rights reserved. 

Terms of Service

 | 

Privacy policy

 | 

Modern Slavery Act Transparency Statement