Abstract: Integrated circuits may include a constant false alarm rate (CFAR) detection circuit, which may identify targets among clutter and noise in a range-Doppler map. The CFAR detection circuit may compute power values for each cell in the range-Doppler map and scan the range-Doppler map cell by cell. For this purpose, the CFAR detection circuit may compute a target value for a cell-under-test and surrounding cells and a noise value for one or more regions in local proximity of the cell-under-test on the range-Doppler map. For example, the CFAR detection circuit may perform a two-dimensional filtering to compute the target value and compute a sum of accumulated power values weighted by predetermined coefficients. The predetermined coefficients may taper at edges of the range-Doppler map and/or at edges of the regions. The CFAR detection circuit may declare a target based on a comparison of the target value and noise value.

Abstract: A technique for peak suppressing and pre-distorting the input signal to wireless amplifiers to improve the linearity of the amplifier and subsequently significantly improving the power efficiency of the amplifier is described. The input to the amplifier, prior to being applied to the amplifier, is modified by a peak suppression and pre-distortion circuit. The peak suppression and pre-distortion circuit uses samples of the output of the amplifier to adaptively adjust a lookup table that is being used for pre-distortion. The input and output of the peak suppression and pre-distortion circuit are at the amplifier frequency. The peak suppression and pre-distortion is performed in digital domain at baseband.