Invention Grant
US08098996B2 Adaptable duobinary generating filters, transmitters, systems and methods 有权
适应性二进制生成滤波器,发射机,系统和方法

  • Patent Title: Adaptable duobinary generating filters, transmitters, systems and methods
  • Patent Title (中): 适应性二进制生成滤波器,发射机,系统和方法
  • Application No.: US11861236
    Application Date: 2007-09-25
  • Publication No.: US08098996B2
    Publication Date: 2012-01-17
  • Inventor: Ilya Lyubomirsky
  • Applicant: Ilya Lyubomirsky
  • Applicant Address: US CA Sunnyvale
  • Assignee: Infinera Corporation
  • Current Assignee: Infinera Corporation
  • Current Assignee Address: US CA Sunnyvale
  • Agent Ross M. Carothers; David L. Soltz
  • Main IPC: H04B10/04
  • IPC: H04B10/04
Adaptable duobinary generating filters, transmitters, systems and methods
Abstract:
A variety of adaptable electronic duobinary generating filters to be used in communication systems are provided, each filter generating an adaptable electronic duobinay signal which is optimized for system impairments. According to one exemplary implementation, an adaptable electronic duobinary generating filter comprises an adaptable delay-and-add circuit, having an adaptable electronic delay element having a delay αT: 1/T being the bit rate of the binary data input into the adaptable delay-and-add circuit, and α being an adaptation parameter which can be optimized depending on the system impairments. In one optional implementation, the adaptable electronic delay element can be programmably adaptable to optimize against deterministic system impairments. In another optional implementation, the adaptable electronic delay element can be dynamically adaptable to optimize against dynamically varying system impairments. Additionally, in one embodiment, an adaptable electronic duobinary drive circuitry based on the adaptable electronic duobinary generating filter can drive an adaptable optical duobinary transmitter in a fiber-optic communication system to produce an adaptable optical duobinary signal, where the adaptation parameter α is optimized to mitigate certain deleterious fiber-optic transmission system impairments, such as distortions due to narrow optical filtering. Corresponding optical duobinary systems and methods are provided. Similarly, the adaptable electronic duobinary generating filter can be used to form an adaptable electronic duobinary transmitter for an electronic duobinary communication system, to optimize the electronic duobinary signal generated.
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