Wireless communication apparatus and power consumption reducing method thereof
AssigneeNEC Corporation
InventorMotoyasu Taguchi
Life of this patent
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Abstract
In a CDMA communication apparatus, two receiving circuits provided in correspondence with the antennas demodulate signals received by the antennas to thereby output reception signals. Two delayprofile circuits provided in correspondence with the receiving circuits shift phases of the reception signals from the receiving circuits every predetermined interval, correlate the reception signals with respect to the known data to thereby output correlation value data. A searcher circuit retrieves peaks from at least two correlation value data derived from the delayprofile circuit and compares the peaks detected from the correlation value data with each other, and substantially stops the operation of at least one of the plural receiving circuits based on the comparison result.
Claims23
A Code Division Multiple Access (CDMA) wireless communication apparatus, comprising:
- a plurality of receivers for receiving signals to output reception signals;
- and
- a controller for substantially stopping operation of at least one of said plural receivers based upon the reception signals received by said receivers,
- wherein each of said plurality of receivers includes a demodulator for demodulating a signal received by an antenna to output a demodulated signal and a correlator for correlating the demodulated signal with respect to a predetermined data to thereby output a correlation value, and
- wherein said controller substantially stops the operation of the reception system having a lower correlation value in such a case that a difference between the correlation values outputted from the respective reception systems exceeds a predetermined threshold value.
A power consumption reducing method of a Code Division Multiple Access (CDMA) wireless communication apparatus, comprising:
- receiving signals at a plurality of reception systems to output a plurality of reception signals;
- and
- substantially stopping operation of at least one of said plural reception systems based upon said plurality of reception signals,
- wherein said stopping operation substantially stops the operation of the reception system having a lower correlation value in such a case that a difference between the correlation values outputted from the respective reception systems exceeds a predetermined threshold value.
A Code Division Multiple Access (CDMA) communication apparatus, comprising:
- at least two antennas;
- at least two receiving circuits provided in correspondence with said antennas, for demodulating signals received by said antennas to thereby output reception signals;
- at least two delayprofile circuits provided in correspondence with said receiving circuits, for correlating said reception signals with respect to a predetermined data to thereby output correlation value data;
- and
- a searcher circuit for detecting peaks from at least two correlation value data derived from said delayprofile circuits, wherein said searcher circuit includes first stopping means for comparing the peaks detected from the correlation value data with each other to obtain a comparison result, and for substantially stopping operation of at least one of said plural receiving circuits based on said comparison result,
- wherein said searcher circuit substantially stops the operation of at least one of the receiving circuits having a lower correlation value in such a case that a difference between the correlation values outputted from the respective reception systems exceeds a predetermined threshold value.
A power consumption reducing method of a Code Division Multiple Access (CDMA) communication apparatus, comprising:
- demodulating signals received by at least two antennas to thereby output reception signals;
- shifting phases of said reception signals every predetermined interval and then correlating said reception signals with respect to a predetermined data to thereby output correlation value data;
- detecting peaks from at least two correlation value data;
- comparing the peaks detected from said at least two correlation value data with each other to obtain a comparison result;
- and
- substantially stopping processing said signal received by at least one of said antennas based on said comparison result.
A Code Division Multiple Access (CDMA) receiving apparatus, comprising:
- two reception systems for receiving signals, demodulating the received signals, and correlating the demodulated reception signals with respect to a predetermined data to thereby output a correlation value;
- and
- a control unit for substantially stopping operation of at least one of said two reception systems based upon the correlation values outputted from the respective reception systems,
- wherein said controller substantially stops the operation of the reception system having a lower correlation value in such a case that a difference between the correlation values outputted from the respective reception systems exceeds a predetermined threshold value.
A power consumption reducing method of a Code Division Multiple Access (CDMA) communication apparatus, comprising:
- demodulating signals received by at least two antennas to thereby output reception signals;
- shifting phases of said reception signals every predetermined interval and then correlating said reception signals with respect to a predetermined data to thereby output correlation value data;
- detecting peaks from at least two correlation value data;
- comparing the peaks detected from said at least two correlation value data with each other to obtain a comparison result;
- and
- substantially stopping processing said signal received by at least one of said antennas based on said comparison result,
- wherein said stopping step substantially stops the operation of at least one receiving circuit of a plurality of receiving circuits having a lower correlation value in such a case that a difference between the correlation values outputted from the respective reception systems exceeds a predetermined threshold value.
A Code Division Multiple Access (CDMA) receiving apparatus, comprising:
- two reception systems for receiving signals, demodulating the received signals, and correlating the demodulated reception signals with respect to a predetermined data to thereby output a correlation value;
- and
- a control unit for substantially stopping operation of at least one of said plural reception systems based upon the correlation values outputted from the respective reception systems,
- wherein said control unit substantially stops the operation of the reception system having a lower correlation value in such a case that a difference between the correlation values outputted from the respective reception systems exceeds a predetermined threshold value.
Dependencies are inferred from the claim text.