Demodulating method and apparatus, receiving method and apparatu

Details Demodulating method and apparatus, receiving method and apparatu Demodulating method and apparatus, receiving method and apparatu

1998-01-15

2000-07-04

Kizou, Hassan

Multiplex communications

Generalized orthogonal or special mathematical techniques

Plural diverse modulation techniques

370208, G08C 1302

Patent

active

060848510

ABSTRACT:
A selector that selects an orthogonally detected output signal of I channel and an orthogonally detected output signal of Q channel and that outputs the selected signals to a path for obtaining a demodulated output signal of I channel is provided. In addition, a selector that selects an orthogonally detected output signal of Q channel and an orthogonally detected output signal of I channel and that outputs the selected signals to a path for obtaining a demodulated output signal of Q channel is provided. These selectors are switched corresponding to whether or not a PN code of I channel is the same as a PN code of Q channel. An output signal of the selector of the path for obtaining the demodulated output signal of I channel and the PN code of Q channel PNQ are ex-ORed and output as a de-spread output signal of I channel. An output signal of the selector of the path for obtaining the demodulated output signal of Q channel and the PN code PNI of I channel are ex-ORed and output as a de-spread output signal of Q channel.

REFERENCES:
patent: 5305349 (1994-04-01), Dent
patent: 5329547 (1994-07-01), Ling
patent: 5579304 (1996-11-01), Sugimoto et al.

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