Apparatus and method for receiving radio signals according to variable weighting factors

A radio reception apparatus comprising:

• a comprising signals received by a plurality of antenna elements and weighted by corresponding weighting factors;
• a first weighting factor calculator that calculates a first weighting factor from a first known signal positioned in a front portion of a slot in a received signal;
• a second weighting factor calculates a second weighting factor from a second known signal positioned in a rear portion of the slot in the received signal;
• and
• a comparator that compares a reception quality of a first combined signal and a second combined signal, produced by the combiner using the first weighting factor and the second weighting factor, respectively, the comparator selecting the one of the first combined signal and the second combined signal having a better reception quality.

A radio reception method comprising:

• receiving signals through a plurality of antenna elements;
• weighting each of the received signals by a corresponding weighting factor;
• combining the weighted signals to obtain a combined signal;
• calculating a first weighting factor from a first known signal positioned in a front portion of a slot in the received signal;
• calculating a second weighting factor from a second known signal positioned in a rear portion of the slot in the received signal;
• comparing a reception quality of a first combined signal, obtained using the first weighting factor, with a reception quality of a second combined signal, obtained using the second weighting factor, and selecting one of the first combined signal and the second combined signal based on the better reception quality.

A radio reception apparatus comprising:

• a combiner that weights signals, received through a plurality of antenna elements, using weighting factors, and that combines the weighted signals;
• a position detector that determines a position in a received signal at which an interference signal mixes into the received signal;
• a first weighting factor calculator that calculates a first weighting factor from the received signal before the position determined by the position detector;
• a second weighting factor calculator that calculates a second weighting factor from the received signal after the position determined by the position detector;
• and
• a switch that switches the weighting factors used in the combiner from the first weighting factor to the second weighting factor at the position determined by the position detector.

A radio reception apparatus comprising:

• a receiver that receives signals by an adaptive array antenna comprising a plurality of antenna elements, each received signal comprising a slot in which a plurality of known signals are positioned;
• a combiner that weighs the received signals using corresponding weighting factors and that combines the weighted signals into a combined signal;
• a detector that detects a known signal from the plurality of known signals that overlaps with an interference signal;
• and
• a calculator that calculates the weighting factors, based on the detected known signal, the calculated weighting factors minimizing the interference signal in the combined signal.

A radio reception method comprising:

• receiving signals by an adaptive array antenna comprising a plurality of antenna elements, each received signal comprising a slot in which a plurality of known signals are positioned;
• weighting the received signals by corresponding weighting factors and combining the weighted signals;
• detecting, from among the plurality of known signals, a known signal that overlaps with an interference signal;
• and
• calculating the weighting factor using the detected known signal to minimize the interference signal included in the combined signal.