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Method and apparatus to generate virtual sector wide static beams using phase shift transmit diversity

  • US 9,450,659 B2
  • Filed: 09/19/2012
  • Issued: 09/20/2016
  • Est. Priority Date: 11/04/2011
  • Status: Expired due to Fees
First Claim
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1. A transmitter, comprising:

  • a first antenna and a first transformer associated with the first antenna; and

    a second antenna and a second transformer associated with the second antenna, the first transformer and the second transformer being configured to receive a same signal and phase shift the signal to produce a plurality of phase shifted signals, each of the phase shifted signals having a phase that changes over time, the first antenna and the second antenna being spaced apart by a desired column distance and mapped to a first logical antenna port, the first antenna and the second antenna being configured to send the plurality of phase shifted signals such that (i) a first resultant beam formed signal from the first logical antenna port has a transmit power equal to a sum of a transmit power of the first antenna and a transmit power of the second antenna, and (ii) the first resultant beam formed signal has a same time averaged beam shape as a beam formed signal from one of the first antenna and the second antenna.

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  • 4 Assignments
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