发明名称 |
ROM-Based complex multiplier useful for FFT butterfly arithmetic unit |
摘要 |
A four-port digital complex multiplier useful for FFT butterfly arithmetic units and in which ROM's are employed as square function look-up tables. Each of the four ports is responsive to a respective one of the component values of two complex numbers. The square-function look-up memories are responsive to various ones of the input ports and cooperate with quarter-square-multipliers to provide component complex products. An output subtractor and an output summer, responsive to mutually exclusive pairs of the quarter-square multipliers, provide a respective real and imaginary component of the product of the two complex numbers.
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申请公布号 |
US4344151(A) |
申请公布日期 |
1982.08.10 |
申请号 |
US19800142594 |
申请日期 |
1980.04.21 |
申请人 |
ROCKWELL INTERNATIONAL CORPORATION |
发明人 |
WHITE, STANLEY A. |
分类号 |
G06F7/48;G06F17/14;(IPC1-7):G06F7/52;G06F1/02 |
主分类号 |
G06F7/48 |
代理机构 |
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代理人 |
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