Patent ID: 7650116

Claim:
A method of interference cancellation in radio communication signals received by a radio access unit of a radio communication system, said radio access unit comprising receiver means and antenna means, said antenna means having a plurality of directionally separated antenna elements for adaptively receiving radio communication signals transmitted by a plurality of remote mobile radio communication units, said method comprising the steps of: a) obtaining radio signals received by each of said antenna elements; b) determining first weighing factors for optimally selecting radio signals of a first mobile radio communication unit among said radio signals obtained in step a); c) weighing said radio signals obtained in step a) by said first weighing factors providing a first radio signal of said first radio communication unit; d) determining second weighing factors for optimally selecting radio signals of a second mobile radio communication unit among said radio signals obtained in step a); e) weighing said radio signals obtained in step a) by said second weighing factors providing a second radio signal of said second radio communication unit; f) subtracting from said second radio signal provided in step e) said first radio signal provided in step c) weighed by said second weighing factors, providing a corrected second radio signal, and g) repeating steps d) to f) for a further mobile radio communication unit by determining further weighing factors, providing a further radio signal of said further radio communication unit and providing a corrected further radio signal by each time subtracting from said further radio signal said previously obtained corrected radio signals weighed by said further weighing factors by reconstructing the first and second radio signals and accumulating the reconstructed first and second radio signals which reduces interference to the further radio signal from the first and second radio signals, till a stop criterion has been satisfied.