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Patent Searching and Data


Title:
FDMA TRANSMITTER-RECEIVER
Document Type and Number:
Japanese Patent JPH09200164
Kind Code:
A
Abstract:

To simply configure a filter group with a different pass band with a small hardware amount by converting a received frequency division multiplex signal into a time division multiplex signal, reproducing the signal into a frequency division multiplex signal again after demultiplexing and re-multiplexing and providing an output.

The transmitter-receiver is provided with a 2-channel multiplex trans-demultiplexer (TDMAX) 5, a 6-channel multiplex TDMUX 6, a 6-channel multiplex trans-multiplexer (TMUX) 7, and a 2-channel multiplex TMUX8. The TMUX converts the multiplexed time division multiplex (TDM) signal into a frequency division multiplex (FDM) signal. Furthermore, the inversion to above, FDM TDM conversion is realized by the TDMUX. Then an FDM signal in channels 1, 4 are converted into TDM signals by the TDMUX6, demultiplexed and re-multiplexed into a channel dependent signal by a speech signal demultiplexer/multiplexer circuit 9 and assembled again into the FDM signal by the TMUX 7 and the resulting signal is transmitted.


Inventors:
ONISHI MAKOTO
FUJIWARA YUKINARI
Application Number:
JP1996000006927
Publication Date:
July 31, 1997
Filing Date:
January 19, 1996
Export Citation:
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Assignee:
HITACHI ELECTRONICS
International Classes:
H04J1/00; H04B7/26; H04J1/05; H04J4/00; (IPC1-7): H04J1/00