Instructional Objectives PreRequisite Introduc tion
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Instructional Objectives PreRequisite Introduc tion

1 Introduc tion brPage 4br Analog Processing Analog Processing Measurand Sensor Conditioner Analog Processor LPF ADC Signal Processing DSP DAC Analog Processor LPF Digital Pro cessing Fig 71 The basic Signal Processing Platform brPage 5br Example FIR

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Instructional Objectives PreRequisite Introduc tion




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Presentation on theme: "Instructional Objectives PreRequisite Introduc tion"— Presentation transcript:


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Instructional Objectives Pre-Requisite Introduc tion 7.1 Introduc tion
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Analog Processing Analog Processing Measurand Sensor Conditioner Analog Processor LPF ADC Signal Processing DSP DAC Analog Processor LPF Digital Pro cessing Fig. 7.1 The basic Signal Processing Platform
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Example FIR Filtering hk xk yk xt Sampler xn Coder xn Quantiz er pt ADC DAC yn Sample/hold Decoder bbits xn Fig. 7.2 D-A and A-D Conversion Process
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yk xk xk hx N Fig. 7.3 Tapped Delay Line represen tation of an FIR filter

FIR filter on (simple) General Pur pose Processor
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lw x0, (r0) lw y0, (r1) x0 y0 x0 y0 mul a, x0,y0 add b,a,b inc r0 inc r1 dec ctr tst c r jnz loop sw b,(r2) inc r2 r2 Let us s ee the program for an early DSP TMS32010 developed by Texas
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ALU P-Regist er Accumulator Multiplier T-Regist er Mem Da ta path: Data Memory Instruction Memory Processor Fig. 7.4 Basic TMS32010 Architecture Here X4, H4, ... are direct (abs ute) memory addresses: LT X4 ;Load T w th x(n-4) MPY H4 ;P = H4*X4 ;Acc = Acc + P LTD X3 ;Load T w th x( n-3); x(n-4) = x(n-3); MPY H3 ; P = H3*X3 ;

Acc = Acc + P LTD X2 MPY H2 ... Two instructions per tap, but requires unrolling
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