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Cancellation of spurious intermodulation products produced in nonlinear channels by frequency hopped signals and spurious signals
Cancellation of spurious intermodulation products produced in nonlinear channels by frequency hopped signals and spurious signals
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机译:通过跳频信号和杂散信号消除非线性信道中产生的杂散互调产物
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摘要
A method and apparatus for intermodulation product (IMP) cancellation. In one embodiment, the method comprises: acquiring copies of source signals that create IMPs in a passband of interest; creating copies of the IMPs for use as IMP cancellation signals by either multiplying the source signals together as a series of digital samples such that the multiplied signals create a near real and continuous time copy of the IMPs or creating a sum of the source signals in near real and continuous time and convolving the sum of the source signals with a mathematical model to effectively multiply the signals together to create a copy of the IMPs; adjusting one or both of phase and amplitude of the copies; and using the copies to cancel the IMPs inband of the passband of interest.
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