Amplitude-phase correction circuit, receiving device and transmi

Details Amplitude-phase correction circuit, receiving device and transmi Amplitude-phase correction circuit, receiving device and transmi

1997-08-13

2000-05-30

Hunter, Daniel S.

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

455102, 455116, 455115, H04Q 1700

Patent

active

060700564

ABSTRACT:
A phase deviation can be prevented at the time of processing carried out when a multi-carrier signal is transmitted. A multi-carrier signal is filtered in a filter (103), and thereafter subjected to fast Fourier transform to produce symbol sequence data. The amplitude and phase of a signal obtained as the symbol sequence data are corrected. As its amplitude-phase correction circuit (211), a correction value storing portion for storing a value to cancel a change amount of the signal caused by an amplitude characteristic and a phase characteristic of the filtering in its pass band, and a multiplier for multiplying an output value of the fast Fourier transform by a value stored in the correction value storing portion are provided.

REFERENCES:
patent: 3845390 (1974-10-01), De Jager et al.
patent: 4943980 (1990-07-01), Dobson et al.
patent: 5128964 (1992-07-01), Mallory
patent: 5444697 (1995-08-01), Leung et al.
patent: 5541552 (1996-07-01), Suzuki et al.
patent: 5896420 (1999-04-01), Kaku et al.

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