Patent ID: 8837525

Claim:
A method for communications in a network having at least one reference device and at least one non-reference device, comprising: (a) sending a downlink-pilot signal via a downlink channel from said non-reference device to said reference device, (b) generating a downlink-channel estimate at said reference device from said downlink-pilot signal, (c) sending at least one uplink signal from a set of uplink signals from said reference device to said non-reference device, said uplink signal set comprising a plurality of said uplink signals including a first uplink-pilot and a second uplink-pilot, at least one of said uplink signals consisting of a phase information of said downlink-channel estimate at said reference device, and (d) evaluating a carrier-phase difference (CPD) from said phase information of said downlink-channel estimate in said uplink signals received by said non-reference device, whereby said non-reference device will have the value of said CPD.