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VARIABLE TRANSMISSION RATE DIGITAL MODEM WITH MULTI-RATE FILTER BANK
VARIABLE TRANSMISSION RATE DIGITAL MODEM WITH MULTI-RATE FILTER BANK
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机译：具有多速率滤波器组的可变传输速率数字调制解调器
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摘要
A signal demultiplexer includes serially-connected 2-demultiplexingfilter banks, including band-stop filters and down-samplers for cullingsampling frequencies of output signals from filters to 1/2. When the2-demultiplexing filter bank operates on four types of filters, first tofourthfilters in an ascending order of frequencies, 2-demultiplexing filter bank isarranged in one of two configurations so that a first filter bank contains atleast the first filter or the second filter, or a second filter bank containsatleast the third filter or the fourth filter. The filter banks are connected insuch a way that signals processed through the first filter are processed bythe first 2-demultiplexing filter bank in a next-stage; signals processedthrough the second filter are processed by the second 2-demultiplexing filterbank in a next-stage. Signals processed through the third filter areprocessed by the first 2-demultiplexing filter bank in a next-stage; andsignals processed through the fourth filter are processed by the second2-demultiplexing filter bank in a next-stage.
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