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Filtering and guard band for non-synchronized transmission

  • US 20080240028A1
  • Filed: 01/07/2008
  • Published: 10/02/2008
  • Est. Priority Date: 01/08/2007
  • Status: Active Grant
First Claim
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1. A method for communication, the method comprising the steps of:

  • enabling a wireless terminal to access a wireless communication system comprised of a plurality of wireless terminals and a plurality of base stations by selecting a sequence from a group of certain sequences for random access;

    allocating at least one sub-carriers on an uplink channel for at least one random access channel, with the uplink channel comprising at least one data channel, and each data channel comprising a continuous set of data sub-carriers;

    filtering the at least one random access channel by applying a Raised Cosine filter;

    mapping the selected sequence to the at least one random access channel to generate a random access channel signal; and

    transmitting the random access channel signal to one of said base stations.

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