Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels
Patent
1995-07-20
1997-12-16
Kizou, Hassan
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via frequency channels
370210, 375350, H04J 102
Patent
active
056993633
ABSTRACT:
A digital signal processing apparatus for frequency multiplexing and demultiplexing of narrow band FDM signals has a first block fine processing stage (11) connected in series to a first block coarse processing stage (16, 17) and in parallel therewith a second block fine processing stage (11a) connected in series to a second block coarse processing stage (16, 17). The two stages 11 and 11a are coupled together at one side remote from the two coarse processing stages (16, 17) to provide a first port (14) and the stages (16 and 17) at the side remote from the port (14) provide a plurality of ports (15). Each stage (11, 11a) is a FIR lowpass filter and each stage (16, 17) incorporates a polyphase filter (16) in connection with a Fast Fourier Transform Unit (17).
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Cornfield Paul Simon
Wishart Alexander Walker
Casey Donald C.
Kizou Hassan
MMS Space Systems Unlimited
Yao Kwang Bin
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