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

Oscillator arrangement, method, computer program and communication device

A technology of oscillator and reference oscillator, applied in power oscillator, wireless communication, automatic control of power, etc., can solve problems such as high power consumption

Active Publication Date: 2016-07-20
TELEFON AB LM ERICSSON (PUBL)
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Circuits designed for very low phase noise can have relatively high power dissipation compared to circuits that accept more phase noise

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
  • Oscillator arrangement, method, computer program and communication device
  • Oscillator arrangement, method, computer program and communication device
  • Oscillator arrangement, method, computer program and communication device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0048] Cellular UE Radio: f RO1 =26MHz, f LO1 = 2.6GHz. N 1 = f LO1 / f RO1 =100→N dB，1 =40dB

[0049] PN RO1fRO1 =-140dBc / Hz→PN RO1fLO1 =PN RO1fRO1 +N dB，1 =-100dBc / Hz

[0050] PN CO1fLO1 =-120dBc / Hzf offset，1 =1MHz→

[0051] PN RO1fLO1 =PN CO1fLO1 =-100dBc / Hzf offset，1 =BW loop，1 =100kHz

[0052] Integrated phase noise:

[0053] IPN 1 =-100dBc / Hz+10log10(BW loop，1 )+10log10(π / 2)=-48dBcπ / 2 factor is the equivalent noise bandwidth of the first-order system.

[0054] The integrated phase noise power roughly defines the reciprocal of the minimum achievable EVM or the maximum achievable SNR when most of the phase noise power resides within the bandwidth of the signal. Therefore, in the example above, it is impossible for the SNR to be better than 48dB (assuming no correction / tracking of the phase noise frequency range is considered).

[0055] Example 2:

[0056] mmW radio: f RO2 =60MHz,f LO2 = 60GHz. N 2 = f LO2 / f RO2 =1000→N dB，2 =60dB

[0057] PN...

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

A reference oscillator arrangement is provided for a communication apparatus capable of communicating according to a plurality of transport formats. The reference oscillator arrangement comprises a reference oscillator controller; a resonator core comprising a reference resonator and a driving circuit for the reference resonator, wherein the resonator core is arranged to provide an oscillating signal at a frequency of the reference resonator; and a reference oscillator buffer arrangement, connected to the resonator core, comprising an active circuit arranged to provide a reference oscillator output based on the oscillating signal. The reference oscillator controller is arranged to receive information about an applied transport format and control the driving circuit and / or the active circuit based on the information about the applied transport format. An oscillator arrangement, a communication device, methods therefor and a computer program are also disclosed.

Description

technical field [0001] The present invention generally relates to a reference oscillator arrangement, an oscillator arrangement, a method of controlling such an arrangement, a computer program implementing the method, and a communication device comprising such an arrangement. Background technique [0002] Radio frequency (RF) transmitters (TX) and receivers (RX) use RF local oscillators (LOs) to drive mixers, which in turn are used to up-mix and down-mix signals. The LO signal generated by a frequency synthesizer such as a phase locked loop (PLL) exhibits phase noise which ultimately limits the achievable performance of the radio link. The problem with phase noise is twofold. First, phase noise with a small frequency offset from the LO frequency generally leads to limitations on the error vector magnitude (EVM), and in the case of Orthogonal Frequency Division Multiplexing (OFDM) transmission, it is easy to understand that the subcarriers will interfere with each other. S...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/32H03L7/099
CPCH03B5/32H03L7/099H03B2200/0062H03B2201/038H03B2200/009H03L7/1075H04W28/14
Inventor 拉尔斯·松德斯特伦何凝罗伯特·巴尔德麦尔
Owner TELEFON AB LM ERICSSON (PUBL)
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com