Title:
【発明の名称】デジタル信号処理装置及び方法
Document Type and Number:
Japanese Patent JP3090522
Kind Code:
B2
Abstract:
Apparatus for and a method of digital signal processing utilises a technique known as sub-band decomposition and reconstruction. A plurality of input channels are provided each of which is mixed with a vernier frequency correction. In a multiplexer implementation, an FFT weighted overlap-add demultiplexer (c) is provided for decomposing each input channel into sub-bands. The sub-band outputs are decimated by a factor (d) to the common input sampling rate of a multiplexer, the sub-bands from each channel then being passed into the appropriate ports of an FFT weighted overlap-add multiplexer (f) by means of a switch matrix (e). The multiplexer (f) reconstructs the individual channels, interpolates each channel up to the output sampling rate of the FDT signal, mixes each channel up to its assigned carrier frequency in the FDM and multiplexes the channels. This provides a computationally efficient architecture with the flexibility to accommodate channels of differing bandwidths.
Inventors:
Alexander walker with heart
Francis The Julian Lake
Paul Christopher Marston
Francis The Julian Lake
Paul Christopher Marston
Application Number:
JP4153492A
Publication Date:
September 25, 2000
Filing Date:
February 27, 1992
Export Citation:
Assignee:
British Aerospace Public Limited Company
Matla Marcony Space U.K. Limited
Matla Marcony Space U.K. Limited
International Classes:
H03H17/00; H03H17/02; H04B7/185; H04J1/05; (IPC1-7): H04J1/05
Domestic Patent References:
| JP61220519A | ||||
| JP63303507A | ||||
| JP3291032A | ||||
| JP444432A |
Attorney, Agent or Firm:
Shigeru Yagita (1 outside)
Shigeru Yagita (2 outside)
Shigeru Yagita (2 outside)