Patent ID: 7738429

Claim:
A uplink synchronization method, comprising: during downlink, a UE setting up downlink synchronization; UE undertaking downlink channel estimation; UE, according to the downlink channel estimation, constructing transport matrix A and uplink synchronization code matrix d to be transmitted by UE; UE obtaining uplink pilot frequency transmission data s based on the matrix A and the matrix d, wherein s contains latest downlink channel fading and multi-path information; during uplink, a NodeB receiving the uplink pilot frequency transmission data s, and setting up uplink synchronization, wherein the uplink pilot frequency transmission data s, the transport matrix A and the uplink synchronization code matrix d have a following relationship: d=A*s=n wherein n is noise component, and wherein, by using a method of Zero-Force Block Linear Equalizer the uplink pilot frequency transmission data s is calculated via a formula as below: Ŝ c,ZF-BLE =( A H A ) −1 A H d=R ZF −1 A H d wherein I is a unit matrix, A H d is a matching filter process, and R MMSE −1 is a de-correlation multi-user detection operation.