Method and apparatus for detecting signals, and transmitting apparatus and receiving apparatus using the same

A method for detecting signals, the method comprising:

• sampling respectively a plurality of symbols contained in a signal to be received, at an interval less than or equal to that of a symbol;
• generating respectively a plurality of correlation values by performing correlation processing on the plurality of symbols sampled by said sampling;
• associating respectively the plurality of correlation values to timings to be sampled included in an interval of one symbol;
• performing statistical processing over the plurality of symbols on the plurality of associated correlation values at the respective timings;
• selecting a maximum value from among the plurality of correlation values on which the statistical processing has been performed at the respective timings;
• performing averaging processing on the plurality of correlation values on which the statistical processing has been performed at the respective timings;
• and
• determining detection of the signal to be received, based on the maximum value selected by said selecting and the average correlation value on which the averaging processing has been performed.

A receiving apparatus, comprising:

• a sampling unit which samples respectively a plurality of symbols contained in a signal to be received, at an interval less than or equal to that of a symbol;
• a correlation unit which generates respectively a plurality of correlation values by performing correlation processing on the plurality of symbols sampled by said sampling unit;
• a statistical processing unit which associates respectively the plurality of correlation values to timings to be sampled included in an interval of one symbol, and performs statistical processing over the plurality of symbols on the plurality of associated correlation values at the respective timings;
• a selector which selects a maximum value from among the plurality of correlation values on which the statistical processing has been performed at the respective timings;
• an averaging processing unit which performs averaging processing on the plurality of correlation values on which the statistical processing has been performed at the respective timings;
• a detector which determines detection of the signal to be received, based on the maximum value selected by said selector and the average correlation value on which the averaging processing has been performed;
• and
• a processing unit which processes the plurality of symbols in the event that the detection of the signal to be received is determined.

A transmitting apparatus, comprising:

• a sampling unit which samples respectively a plurality of symbols contained in a signal to be received, at an interval less than or equal to that of a symbol;
• a correlation unit which generates respectively a plurality of correlation values by performing correlation processing on the plurality of symbols sampled by said sampling unit;
• a statistical processing unit which associates respectively the plurality of correlation values to timings to be sampled included in an interval of one symbol, and performs statistical processing over the plurality of symbols on the plurality of associated correlation values at the respective timings;
• a selector which selects a maximum value from among the plurality of correlation values on which the statistical processing has been performed at the respective timings;
• an averaging processing unit which performs averaging processing on the plurality of correlation values on which the statistical processing has been performed at the respective timings;
• a detector which determines detection of the signal to be received, based on the maximum value selected by said selector and the average correlation value on which the averaging processing has been performed;
• and
• a transmitter which transmits a predetermined signal in the event that the signal to be received is not detected.