8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and modifying DSP based systems. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EH184A Digital Signal Processing Evidence shall show an understanding of digital signal processing, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: T1. DSP development technologies T2. Infinite Impulse Response (IIR) filter encompassing: pole-zero placement method to obtain coefficients for a simple first-order and second-order low-pass and band-pass IIR filter. direct-form realisation of a simple IIR filter suitable for sin(x)/x compensation. DSP system T3 High-order IIR filter encompassing: filter design package to obtain the coefficients for a high-order IIR filter high-order IIR filter would be realised using a cascade or a parallel combination of first-order or second-order IIR filter blocks. effect of coefficient quantisation errors and calculation rounding-off errors on filter performance. IR filters and symmetrical FIR filters T4 Discrete Fourier Transform (DFT) to a signal encompassing: discrete correlation. signal-detection. correlation used to generate DFT. window-function when generating the DFT. T5 Concept of complex signals encompassing: positive-frequency and a negative frequency signal. exponential and polar form of sinusoidal signal and a complex sinusoidal signal. spectra of a general signal having equal real and imaginary components. (An “analytic” or “quadrature” signal). analytic signals simplification filtering operations T6 Fast Fourier Transform (FFT) encompassing: Decimation in Time FFT, and the “twiddle factor”. sample-frequency and number of signal samples needed for a FFT. FFT routine. T7 FIR filtering using FFT encompassing: overlap, save method of implementing a long FIR filter using the FFT and the inverse FFT. limitations on the stored frequency-response coefficients and the resulting impulse-response. T8 Data-rate conversion encompassing: data-rate conversion (decimation) simplification of the anti-alias filter requirement data-rate conversion (interpolation) of the DSP system simplification the reconstruction-filter requirement and reduces the need for sin(x)/x compensation. T9 Modulation and de-modulation techniques encompassing: Spectra where real signals and analytic (quadrature) signals are modulated by a sinusoidal function. amplitude-modulated signal single-sideband signal T10 Digital processing steps in practical DSP applications T11 Currently available DSP support chips |