Evaluation of Image Response Signal Power Resulting from I-Q Channel Imbalance

A simple relationship is obtained that gives the ratio of the image to the desired signal in terms of the amplitude and phase imbalance between the I and Q channels in a quadrature transmission and signal reconstruction processor.     

Adaptive A/D converter for improved DS/SS jam resistance

The use of polar nonlinear processing to reject a constant carrier envelope (and possibly wideband) jammer of a DS/SS spread spectrum link is explored, with the additional objective of ensuring constant false alarm rate (CFAR) in the reception of the associated DS/SS synchronization preamble. It is shown that the constant carrier envelope jammer can be rejected very effectively, with CFAR, whether it is transmitted continuously or pulsed at some maximally damaging duty cycle