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Variable scaling of 16-bit fixed point fast fourier forward and inverse transforms to improve precision for implementation of discrete multitone for asymmetric digital subscriber loops

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04K-001/10
출원번호 US-0742226 (1996-10-31)
발명자 / 주소
  • Mannering Dennis G.
  • Gatherer Alan
  • Shaver Donald P.
출원인 / 주소
  • Texas Instruments Incorporated
대리인 / 주소
    Franz
인용정보 피인용 횟수 : 130  인용 특허 : 14

초록

A discrete multitone (DMT) digital subscriber loop (xDSL) telecommunication system has a transmitter portion including a bit encoder, inverse fast Fourier transform (FFT), parallel-to-serial converter, digital-to-analog converter and line driver for transmitting data signals to a twisted pair teleph

대표청구항

[ What is claimed is:] [1.] In a discrete digital multitone (DMT) digital subscriber loop (xDSL) telecommunications system having a transmitter portion including a bit encoder, an inverse fast Fourier transform (IFFT), parallel-to-serial converter, digital-to-analog converter and line driver for tra

이 특허에 인용된 특허 (14)

  1. Cioffi John (Cupertino CA), ADSL compatible discrete multi-tone apparatus.
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  14. Hunt Ronald R. (San Jose CA) Chow Peter S. (Mountain View CA), Updating of bit allocations in a multicarrier modulation transmission system.

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