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US 7,031,739 B1Granted
Code division multiple access communication apparatus and method thereof
AssigneeNEC Corporation
InventorMinoru Imura
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AssigneeNEC Corporation
InventorMinoru Imura
Estimating the term…
A CDMA communication apparatus according to the present invention is constructed of a plurality of spreading units, an adding unit, a coefficient setting unit, a multiplying unit, and a transmission unit. The plural spreading units spread a plurality of transmission data containing a pilot signal and a data signal by using different codes from each other to output spread signals. The adding unit adds a plurality of spread signals derived from the respective spreading units to each other so as to output an additional signal. The coefficient setting unit outputs a coefficient set in such a manner that transmission power of the pilot signal is made substantially coincident with transmission power of the data signal. The multiplying unit multiplies, in particular, a pilot signal portion contained in the addition signal outputted from the adding unit by the coefficient outputted from the coefficient setting unit. The transmission unit transmits the signal outputted from the multiplying unit.
A spread multi-code communication apparatus for transmitting a plurality of transmission data by spreading said plurality of transmission data by employing different codes from each other, comprising:
A Code Division Multiple Access (CDMA) communication apparatus in which, with respect to a plurality of transmission data, each having a data signal and a pilot signal, said pilot signal is spread by way of a first spreading code which is commonly used to the respective transmission data, said data signal is spread by way of second spreading codes which are different from each other as to the respective transmission data, and all of the spread transmission data are added to each other, whereby the added transmission data is transmitted, comprising:
A spread multi-code communication method for transmitting a plurality of transmission data by spreading said plurality of transmission data by employing different codes from each other, said method comprising:
A Code Division Multiple Access (CDMA) communication method in which, with respect to a plurality of transmission data, each having a data signal and a pilot signal, said pilot signal is spread by way of a first spreading code which is commonly used to the respective transmission data, said data signal is spread by way of second spreading codes which are different from each other as to the respective transmission data, and all of the spread transmission data are added to each other, whereby the added transmission data is transmitted, said method comprising:
Dependencies are inferred from the claim text.