×

Method and system for power controlled effective allocation of sub-bands in ultra-wideband communication

  • US 20070091983A1
  • Filed: 05/31/2006
  • Published: 04/26/2007
  • Est. Priority Date: 06/01/2005
  • Status: Active Grant
First Claim
Patent Images

1. A method for power efficient channel allocation in a multi-band multi-user ultra-wideband (UWB) system, including a plurality of K users, a plurality of S sub-bands, and a plurality of N sub-carriers, wherein each kth of said plurality of K users requests transmission with a data transmission rate Rk, including the steps of:

  • defining a sub-band assignment matrix A including a plurality of aks elements, wherein k=1, 2, . . . , k, and s=1, 2, . . . , S, said aks represents the duration of a data packet which the kth user is allowed to transmit on the sth sub-band;

    establishing a power allocation matrix P including a plurality of Pks elements, each Pks representing the transmit power of the kth user at each sub-carrier of the sth sub-band;

    calculating said sub-band assignment matrix A and said power allocation matrix P under pre-defined constraints to allocate the users'"'"' transmissions to respective sub-bands, thereby minimizing the overall transmit power in said UWB system; and

    , adapting said sub-band assignment matrix A and said power allocation matrix P to said respective sub-bands'"'"' conditions, if said allocation of the users'"'"' transmissions to said respective sub-bands deviates from a predetermined allocation criteria.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×