Successive interference canceling for CDMA

A communication device, comprising:

• an interference cancellation filter that is operable to reduce ingress or narrowband interference within a signal thereby generating a filtered signal, wherein the interference cancellation filter generates inter-code interference within the signal;
• and
• an interference cancellation functional block includes a de-spread functional block, a derotator, a slicer, a rerotator, a re-spread functional block, and a convolution functional block;
• and wherein:
• the de-spread functional block is operable to de-spread the filtered signal thereby generating a de-spread signal;
• the derotator is operable to operable to compensate for any rotation of a constellation to which a symbol of the signal is mapped thereby generating a derotated signal;
• the slicer is operable to slice the derotated signal thereby generating a sliced signal;
• the rerotator is operable to operable to reintroduce the rotation of the constellation into the sliced signal thereby generating a rerotated signal;
• the re-spread functional block is operable to re-spread the rerotated signal thereby generating a re-spread signal;
• the convolution functional block is operable to convolve the re-spread signal to reproduce the inter-code interference generated by the interference cancellation filter thereby generating a convolved signal;
• and
• the convolved signal is combined with the filtered signal thereby generating a cleaned signal.

A method for performing interference cancellation within a signal, the method comprising:

• employing an interference cancellation filter to filter a signal to reduce ingress or narrowband interference within the signal thereby generating a filtered signal, wherein the filtering generates inter-code interference within the signal;
• de-spreading the filtered signal thereby generating a de-spread signal;
• slicing the de-spread signal thereby generating a sliced signal;
• re-spreading the sliced signal thereby generating a re-spread signal;
• convolving the re-spread signal, that includes reproducing the inter-code interference generated by the interference cancellation filter, thereby generating a convolved signal;
• and
• combining with the filtered signal thereby generating a cleaned signal.