RECEPTION EQUIPMENT RECEPTION METHOD AND TERMINAL EQUIPMENT FOR PORTABLE TELEPHONE SYSTEM

Japanese Patent JP3796870

B2

PROBLEM TO BE SOLVED: To enable inverse spreading by multiplying a complex conjugate to a signal and to attain the reduction of circuit scale concerning a spread spectrum system receiver.
SOLUTION: This equipment is provided with a selector 55 for selecting either the orthogonal detection output of I channel or the orthogonal detection output of Q channel and outputting it to a path for providing the demodulation output of I channel and a selector 56 for selecting either the orthogonal detection output of Q channel or the orthogonal detection output of I channel and outputting it to a path for providing the demodulation output of Q channel. The selectors 55 and 56 are switched corresponding to whether the PN code of I channel and the PN code of Q channel are coincident or not. The output of selector 55 to the path for providing the demodulation output of I channel and a PN code PNQ of Q channel are exclusively ORed and this result is defined as the inverse spreading output of I channel. The output of the selector 56 to the path for providing the demodulation output of Q channel and a PN code PNI of I channel are exclusively ORed and this result is defined as the inverse spreading output of Q channel.

JP2018174491	ARTIFICIAL SATELLITE
JP5494394	Receiver
JP5186600	Frequency offset estimation / compensation methods and systems for mobile communications

Jun Iwasaki

JP891997A

July 12, 2006

January 21, 1997

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ソニー株式会社

H04B1/7087; H03K19/21; H04B1/69; H04B1/707; H04B7/26; H04J11/00; H04W88/02; (IPC1-7): H04B1/707; H03K19/21; H04B7/26; H04J11/00

JP9153883A
JP3165646A
JP5167559A

Masatomo Sugiura

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