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Multiple antenna system

  • US 7,394,883 B2
  • Filed: 08/25/2004
  • Issued: 07/01/2008
  • Est. Priority Date: 03/08/2004
  • Status: Expired due to Fees
First Claim
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1. A multiple-antenna system including a base station apparatus and a plurality of antenna apparatuses connected to the base station via optical cables, the system comprising:

  • a first antenna apparatus and a second antenna apparatus connected to each other via an electric cable, each of the first and second antenna apparatuses receiving a reference pulse from the base station apparatus via the optical cables and estimating a time difference between the received reference pulse and the reference pulse supplied from the counterpart antenna apparatus via the electric cable, at least one of the first and second antenna apparatuses adjusting signal transmission timing based on the time differences estimated by the first and second antenna apparatuses.

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