|発明の名称||ASYNCHRONOUS CODE MODULATED SIGNAL RECEIVER|
PROBLEM TO BE SOLVED: To provide an asynchronous code modulation signal receiver with a simpler configuration than that of prior arts and capable of more accurately decoding an asynchronous code modulation signal.
SOLUTION: The asynchronous code modulation signal receiver employs a prescribed code modulation system using a plurality of predetermined codes and receives and decodes a code modulation signal subjected to code modulation according to a data signal as a received signal. An orthogonal signal frequency conversion circuit 20 of the asynchronous code modulation signal receiver converts the received signal into two signals substantially orthogonal to each other, and a digital correlation unit 10 multiplies the codes with the two converted signals, summs the products and calculates a likelihood of a correlation value with the codes on the basis of an output value signal as a result of the summation. A synchronization discrimination unit 11 determines and outputs a decoded data signal by discriminating a synchronization point of the received signal with the codes on the basis of the calculated likelihood of the correlation value.
- 国立大学法人 京都工芸繊維大学 研究推進課 知的財産係
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