| 摘要 |
PURPOSE:To release the increase in a memory capacity and to facilitate the realization of a system by realizing the production of a multi-band limiting waveform with the production based on digital processing of N-dimension component waveform and addition and synthesis. CONSTITUTION:A modulation wave before band limit is decomposed into element waveforms, plural component waveforms resulting from applying relevant prescribed band limits stored in advance to the decomposed element waveforms respectively are read from a component waveform production ROM and synthesized to generate desired multi-band limiting waveform. That is, waveforms BA1,..., BAN after band limit corresponding to the input of the N-dimension component waveform are subjected to time division switching according to an N-dimension switching signal SEL and fed sequentially to a component waveform generation ROM 1 as a block address BA and the readout memory block is designated and the ROM is scanned and read by a scan address SA. The readout component waveform output is outputted in parallel by a demultiplexer 4 and the outputs are added and synthesized by an adder 5. Thus, the multi-band limiting waveform generating system is realized, in which the hindrance of an exponential increase in the memory capacity is released. |
