Patent ID: 7333774

Claim:
A method for location-assisted wireless communications, the method comprising: a) performing a calibration procedure comprising: i) determining a location of a first mobile transceiver in a service area of a base station located at a base station location; ii) measuring channel characteristics of a wireless channel between the base station and the first mobile transceiver, wherein the wireless channel comprises multiple spatial signal paths between the base station location and the location of the first mobile transceiver, and wherein the measured channel characteristics comprise multiple angle of arrival parameters representing measured angles of arrival of signals propagating through the multiple spatial signal paths, and multiple time delay parameters representing measured time delays of the signals propagating through the multiple spatial signal paths; and iii) storing in a database channel information comprising the measured channel characteristics indexed by the location of the first mobile transceiver; and b) performing real-time wireless communications comprising: v) obtaining a current location of a second mobile transceiver; vi) retrieving from the database stored channel characteristics corresponding to the current location of the second mobile transceiver, wherein the stored channel characteristics comprise L stored angle of arrival parameters θ 1 , . . . , θ L corresponding to L multiple spatial signal paths between the base station location and the current location of the second mobile transceiver, and L stored time delay parameters τ 1 , . . . , τ L corresponding to the L multiple spatial signal paths between the base station location and the current location of the second mobile transceiver; vii) receiving at the base station signals transmitted over a wireless channel from the second mobile transceiver at the current location, wherein the received signals propagate over the L multiple spatial signal paths between the base station location and the current location of the second mobile transceiver; and viii) performing space-time structured reception to improve reception of the received signals, wherein the space-time structured reception comprises processing the received signals using the L stored angle of arrival parameters θ 1 , . . . , θ L corresponding to the L multiple spatial signal paths between the base station location and the current location of the second mobile transceiver, and the L stored time delay parameters τ 1 , . . . , τ L corresponding to the L multiple spatial signal paths between the base station location and the current location of the second mobile transceiver.