Filter bank for the frequency division multiplexin

专利名称：Filter bank for the frequency division

multiplexing or demultiplexing of channelsignals

发明人：GOCKLER, HEINZ, DIPL.-ING.申请号：EP115677.0申请日：190825公开号：EP0365785A2公开日：19900502

专利附图：

摘要：The invention relates to a filter bank for frequency-division demultiplexing andmultiplexing of L-channel signals, consisting of L-type transversal filters (non-recursive

filters, filters with a finite duration of the pulse response (FIR)), with complex-valuedcoefficients, for real-value input signals and with complex-value output signals orconversely, with a sampling rate which is reduced or increased by a factor of M at theoutput, the L-filters being implemented by cascading several filters, in which

arrangement the sampling rate is reduced or increased by a factor of Mq in each cascadestage, and is characterised by the fact that, in each case, in the individual filter cascadespreceding the same cascade stage, a complex multiplier is inserted which multiplies thecomplex-valued output signal of the filter of the preceding cascade stage by thecomplex sequence of a complex carrier oscillation. Such filter banks are predominantlyused for multiplexing or demultiplexing for single FDM channels in transmultiplexers, forexample in satellite engineering. The aim of the invention is a unification of the overallarrangement of the filter bank by reducing the plurality of different filters or differentfilter coefficients, respectively. An improved characteristic with respect to the design,test, production is achieved, and better possibilities for introducing redundancy (which isof particular importance in the satellite application). In many cases, a reduction in thecomputing effort is additionally achieved.

申请人：ANT NACHRICHTENTECHNIK GMBH

地址：Gerberstrasse 33 D-71522 Backnang DE

国籍：DE

更多信息请下载全文后查看