MODAL ADAPTIVE ANTENNA USING PILOT SIGNAL IN CDMA MOBILE COMMUNICATION SYSTEM AND RELATED SIGNAL RECEIVING METHOD
One or more input signals are used to generate a Pseudo noise generator and re-inject the signal to obtain a more efficient method of control of a receiver using adaptive antenna array technology. The antenna array automatically adjusts its direction to the optimum using information obtained from the input signal by the receiving antenna elements. The input signals may be stored in memory for retrieval, comparison and then used to optimize reception. The difference between the outputs of the memorized signals and the reference signal is used as an error signal.
1 . In a multi-mode antenna system comprising a radiating element and one or more parasitic elements positioned adjacent to the radiating element, wherein the one or more parasitic elements are selectively configured about a plurality of possible antenna modes to vary a resulting radiation pattern of the antenna system, a method for configuring the antenna for optimum performance, the method comprising:
receiving a plurality of radio signals;
storing said radio signals in memory;
weighting each of the plurality of radio signals stored in memory; and
combining the weighted signals in a summing circuit to generate an output signal.
2 . The method of claim 1 , wherein the method further comprises:
configuring the antenna system in a first mode of said plurality of possible antenna modes;
receiving a first pilot signal with the antenna system in the first mode;
configuring the antenna system in a second mode;
receiving a second pilot signal with the antenna system in the second mode; and
estimating antenna performance for each of the first and second modes.
3 . The method of claim 2 , wherein said weighted signals are evaluated at an adaptive processor based on the antenna performance for each of the first and second modes.