GMSK (Guassian Minimum Shift Keying) modulation device and method

A technology for modulating signals and data, applied in the field of GMSK modulation devices, can solve the problems of large chip area and large ROM space occupation, and achieve the effect of small chip area and reduced ROM occupation

Inactive Publication Date: 2010-09-15
广州市广晟微电子有限公司
View PDF7 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of realizing the present application, the inventor finds that there are at least the following problems in the prior art: the look-up table in the look-up table method for realizing GMSK mo...

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
  • GMSK (Guassian Minimum Shift Keying) modulation device and method
  • GMSK (Guassian Minimum Shift Keying) modulation device and method
  • GMSK (Guassian Minimum Shift Keying) modulation device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0077] figure 1 Shown is a schematic structural diagram of a GMSK modulation device implemented by using a look-up table method in the prior art. The working process of the GMSK modulation device includes: after the input signal is shifted by the first data processing module 101, the obtained highest bit (the position shown by A in the figure) data is sent to the accumulator 102 for accumulation operation, and The accumulative result is sent into the address interfaces shown in e and f of the data reading module 104 respectively in high and low order, wherein position e shown in the figure is a high address interface; Arrangement to high order (i.e. the order shown in E, D, C, B in the figure), and send it into the high four-bit address interface arranged from high to low in the data reading module 104 (i.e. a, b, c in the figure , d arrangement sequence shown in the position). The three output signals generated by the counter 103 are sent into the low three-bit address inte...

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 GMSK (Guassian Minimum Shift Keying) modulation device and method. The GMSK modulation device comprises a first data processing module, a first data generation module, a second data generation module, a data acquisition module and a second data processing module. Compared with the prior art, the GMSK modulation device provided by the embodiment of the invention does not use an accumulated phase bypass of a baseband signal as an address acquiring modulation signal data inside a lookup table, the lookup table only stores the modulation signal data related to the real-time phase information of the baseband signal, the final modulation signal data of the baseband signal is obtained by the modulation signal data looked up from the lookup table through angle rotation, therefore the ROM (Read Only Memory) occupying quantity of the lookup table is greatly reduced, the less capacity of the storage space of the ROM is, the smaller volume of the ROM is, and then the smaller area of an occupied chip is, thus the GMSK modulation device is more suitable for an super-large-scale integration.

Description

technical field [0001] The present application relates to the technical field of mobile communication, in particular to a GMSK modulation device and method. Background technique [0002] The basic working principle of GMSK (Gaussian-filtered Minimum Shift Keying, Gaussian-filtered Minimum Shift Keying) modulation is to shape the baseband signal through a Gaussian filter first, and then perform minimum frequency shift keying (MSK) modulation, because the spectrum of GMSK modulation The characteristic is better than the spectrum characteristic of MSK signal, so it is widely used in the field of mobile communication. [0003] The key to GMSK modulation is to determine the phase of the final output modulated signal according to the input bit. [0004] At present, the table look-up method is mainly used to realize GMSK modulation, and the modulated signal can be expressed as s(t)=Acos(2pf c t+j(t)), -? t<+□. j(t) can be expressed as Among them, a i is the value of the i...

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): H04L25/03H04L27/20
Inventor 叶晖梁晓峰
Owner 广州市广晟微电子有限公司
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