Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for moving quantization noise introduced in fixed-point calculation of fast fourier transforms

A technology of quantization noise and representation transformation, applied in the field of communication networks, can solve problems such as quantization noise, large quantization noise, and system performance deterioration

Active Publication Date: 2011-04-27
TELEFON AB LM ERICSSON (PUBL)
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, when FFT / IFFT is calculated using fixed-point calculations, quantization noise appears in the result
This quantization noise is greater in some regions than others and can degrade system performance

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
  • Method for moving quantization noise introduced in fixed-point calculation of fast fourier transforms
  • Method for moving quantization noise introduced in fixed-point calculation of fast fourier transforms
  • Method for moving quantization noise introduced in fixed-point calculation of fast fourier transforms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will now be described more fully with reference to the accompanying drawings, in which embodiments of the invention are shown. However, this invention should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numerals refer to like elements throughout.

[0031] As used herein, the term "comprises" or "comprises" is expandable and includes one or more stated features, integers, elements, steps, components or functions, but does not exclude the presence or addition of one or more other features , integers, elements, steps, components, functions, or groups thereof.

[0032] As used herein, the term "and / or" includes any combination of one or more of the associated listed items.

[0033] The terms used herein are for describing specific embodiments only, and are...

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 discloses a method in an electronic communication device for processing a digital signal within a wireless communication network in order to transform the digital signal from a first domain representation to a second domain representation in a communication device, comprising the steps of: transforming (86, 98) the signal from the first domain to the second domain resulting in a signal of a first order of values with quantization noise in at least one area of the second domain, and performing (88, 100) a cyclic shift on the transformed signal to move the quantization noise in the second domain, resulting in a first shifted signal.

Description

technical field [0001] The present invention relates to methods and arrangements in communication networks. In particular, the invention relates to processing digital signals in wireless communication networks. Background technique [0002] In 3GPP's Long Term Evolution (LTE), a new flexible air interface is currently being standardized. The LTE system will provide spectrum flexibility in the sense that it can handle carrier bandwidths varying between 1.25 MHz and 20 MHz, and frequency division duplex FDD and time division duplex TDD are supported to enable use of paired and unpaired spectrum, expected LTE is a smooth evolution path for 3G standards such as WCDMA, TD-CDMA and TD-SCDMA. LTE is also expected to provide significant performance improvements compared to current 3G standards by using, for example, various advanced antenna technologies. [0003] In the downlink of LTE, the physical layer is based on Orthogonal Frequency Division Multiplexing (OFDM). Here, infor...

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): H04L27/26G06F17/14G06F7/76
CPCH04L27/2607H04L27/2628G06F17/142H04L27/2636
Inventor A·斯基曼H·萨林
Owner TELEFON AB LM ERICSSON (PUBL)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com