Patent ID: 7058146

Claim:
A method of interference mitigation by coordinated transmission in a wireless communication system having at least a first transmitter, a second transmitter and a receiver, said receiver being located within a coverage area, said method comprising the following steps: a) determining a time delay between reception at a predetermined point in said coverage area that is not coincident with the first or second transmitters of a first signal S 1 transmitted from said first transmitter at a first frequency f 1 and a second signal S 2 transmitted from said second transmitter at said first frequency f 1 ; and b) introducing a transmission delay τ between the transmission of said first signal S 1 and the transmission of said second signal S 2 such that said first signal S 1 and said second signal S 2 are received coherently at said predetermined point, whereby said first signal S 1 and said second signal S 2 are received substantially coherently by said receiver, thereby aiding in interference mitigation.