DISCRETE FOURIER TRANSFORM AND DIGITAL CHANNELIZER HAVING EFFECTIVE ARCHITECTURE FOR ITS OPERATION

摘要

PROBLEM TO BE SOLVED: To divide input bandwidth such as a broadband signal into at least a part of N pieces of available channels by being connected to at least one of P pieces of actual inputs including a conjugate signal and processing the conjugation as what represents one of N pieces of inputs. SOLUTION: A discrete Fourier transforming part includes calculating parts 302 and 305'. Even though N pieces of inputs (e.g. frequency domain signals) having conjugates and N/2 (no conjugation for an even N) respectively represent that only a frequency signal 7 is used instead of a frequency domain signal 5, they can respectively be represented by their conjugates in their output, and subsequently, the conjugates are processed instead of the frequency domain signal that is not an actual output. Further, at least one conjugate such as to represent one of inputted signals is processed by using at least one processing device 602. Thus, a conjugate is processed as one representing one of N pieces of inputs by being connected to P pieces of actual outputs.