GB201218807D0 - Method and apparatus for reducing interference - Google Patents

Method and apparatus for reducing interference

Info

Publication number
GB201218807D0
GB201218807D0 GB201218807A GB201218807A GB201218807D0 GB 201218807 D0 GB201218807 D0 GB 201218807D0 GB 201218807 A GB201218807 A GB 201218807A GB 201218807 A GB201218807 A GB 201218807A GB 201218807 D0 GB201218807 D0 GB 201218807D0
Authority
GB
United Kingdom
Prior art keywords
reducing interference
interference
reducing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB201218807A
Other versions
GB2507099A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renesas Electronics Corp
Original Assignee
Renesas Mobile Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renesas Mobile Corp filed Critical Renesas Mobile Corp
Priority to GB201218807A priority Critical patent/GB2507099A/en
Publication of GB201218807D0 publication Critical patent/GB201218807D0/en
Publication of GB2507099A publication Critical patent/GB2507099A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • H04B1/001—Channel filtering, i.e. selecting a frequency channel within the SDR system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators
    • H03M7/3031—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path
    • H03M7/3042—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path the modulator being of the error feedback type, i.e. having loop filter stages in the feedback path only

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Noise Elimination (AREA)
GB201218807A 2012-10-19 2012-10-19 Performing noise shaping of a transmitter's DAC to reduce the quantisation noise in a receiver band Withdrawn GB2507099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201218807A GB2507099A (en) 2012-10-19 2012-10-19 Performing noise shaping of a transmitter's DAC to reduce the quantisation noise in a receiver band

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201218807A GB2507099A (en) 2012-10-19 2012-10-19 Performing noise shaping of a transmitter's DAC to reduce the quantisation noise in a receiver band

Publications (2)

Publication Number Publication Date
GB201218807D0 true GB201218807D0 (en) 2012-12-05
GB2507099A GB2507099A (en) 2014-04-23

Family

ID=47359146

Family Applications (1)

Application Number Title Priority Date Filing Date
GB201218807A Withdrawn GB2507099A (en) 2012-10-19 2012-10-19 Performing noise shaping of a transmitter's DAC to reduce the quantisation noise in a receiver band

Country Status (1)

Country Link
GB (1) GB2507099A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9853654B2 (en) * 2015-02-25 2017-12-26 Qualcomm Incorporated Error-feedback digital-to-analog converter (DAC)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7061989B2 (en) * 2004-05-28 2006-06-13 Texas Instruments Incorporated Fully digital transmitter including a digital band-pass sigma-delta modulator
US7787563B2 (en) * 2004-12-08 2010-08-31 Texas Instruments Incorporated Transmitter for wireless applications incorporation spectral emission shaping sigma delta modulator
US20060217082A1 (en) * 2005-03-22 2006-09-28 Georg Fischer Shaping noise in power amplifiers of duplex communication systems
US20080219331A1 (en) * 2007-03-07 2008-09-11 Matsushita Electric Industrial Co., Ltd. Methods and apparatus for reducing the effects of DAC images in radio frequency transceivers
EP2139121A1 (en) * 2008-06-24 2009-12-30 Alcatel-Lucent Deutschland AG A method for signal transmission and reception, a transmitter, a radio frequency system, a base station, a mobile station and a communication network therefor
DE102009024284A1 (en) * 2009-06-05 2010-12-09 Rheinisch-Westfälische Technische Hochschule Aachen Sigma-delta modulator for high frequency-transmitter of communication device, has loop-filter designed as notch filter, where noise transfer function of modulator has local minimum with frequency that lies in proximity of receiving band

Also Published As

Publication number Publication date
GB2507099A (en) 2014-04-23

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)