If you're going to do anything in the way of signal processing you will need much more advanced math skills. You're going to need to know calculus, fourier transforms, laplace transforms along with their discrete versions (dft, fft, z). These are extremely useful, powerful mathematical techniques for analyzing data. The mathematics behind them are amazing and elegant. Examples of their use include the enabling of the 'digital' content age through video and audio compression. That's just one example, they can be used to analyze any data stream. It is amazing using DSP to find data in a sea of noise.