Patent ID: 8009598

Claim:
A method of radio resource allocation for determining the transmission powers and subcarrier fractions for mobile stations in a downlink mobile MIMO-OFDMA system with a channel matrix, a predetermined user capacity condition, and a plurality of default transmission powers, comprising the steps of: performing a matrix operation on said channel matrix to generate a diagonal matrix; performing a first subcarrier fraction allocation by maximizing a sum capacity function according to said default transmission powers and said predetermined user capacity condition to allocate a plurality of first subcarrier fractions of said mobile stations; performing a first transmission power allocation according to said first subcarrier fractions of said mobile stations to allocate a plurality of first transmission powers of said mobile stations; and performing a second subcarrier fraction allocation by maximizing said sum capacity function according to said first transmission powers and said predetermined user capacity condition to allocate a plurality of second subcarrier fractions of said mobile stations, wherein said sum capacity function is associated with said diagonal matrix, said transmission powers, and said subcarrier fractions.