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Constrained hopping in wireless communication systems

  • US 8,571,132 B2
  • Filed: 12/21/2005
  • Issued: 10/29/2013
  • Est. Priority Date: 12/22/2004
  • Status: Expired due to Fees
First Claim
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1. In a wireless OFDMA communication that estimates multiple channels in a MIMO system operating over a given frequency band, wherein channel estimation is more efficient for allocating resources when users'"'"' symbols are transmitted in a hopping pattern over the full band, a method comprising:

  • a) transmitting a user'"'"'s symbols in a hopping pattern over the full broadband;

    b) receiving from a receiver a plurality of pilot signals in a more than one subband and a neighboring subband of a frequency band having an in range portion defined by a contiguous range of frequencies adjacent to the edge of the subband and an out of range portion defined by the remaining frequencies in the neighboring subband;

    c) receiving a channel quality indicator (CQI) indicative of channel quality of each subband observed in a wireless device;

    d) estimating a channel response-based on some of the plurality of pilot signals in more than one subband and the pilot signal in the range portion of the neighboring subband; and

    e) assigning the transmission to occur in either the signal subband or to operate in more than one subband based on a determination of the channel quality indicator.

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