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view m-toolbox/classes/@miir/parseFilterParams.m @ 41:6def6533cb16 database-connection-manager
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author | Daniele Nicolodi <nicolodi@science.unitn.it> |
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date | Mon, 05 Dec 2011 18:04:34 +0100 |
parents | f0afece42f48 |
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% PARSEFILTERPARAMS parses the input plist and returns a full plist for designing a standard IIR filter. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % DESCRIPTION: PARSEFILTERPARAMS parses the input plist and returns a % full plist for designing a standard IIR filter. Defaults are used % for those parameters missing from the input plist. % % CALL: plo = parseFilterParams(pl) % % INPUT: 'type' - one of 'highpass', 'lowpass', 'bandpass', 'bandreject' % [default: 'lowpass'] % 'gain' - gain of filter % [default: 1.0] % 'fs' - sample frequency to design for % [default: 1 Hz] % 'order' - order of filter % [default: 1] % 'fc' - corner frequencies. This is a two element vector for % bandpass and bandreject filters. % [default: 0.1 or [0.1 0.25] Hz] % % VERSION: $Id: parseFilterParams.m,v 1.5 2010/10/29 16:09:14 ingo Exp $ % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% function plo = parseFilterParams(pl) plo = plist(); % type type = find(pl, 'type'); if isempty(type) type = 'lowpass'; utils.helper.msg(msg.OPROC2, 'using default type ''lowpass'''); end plo = append(plo, param('type', type)); % gain gain = find(pl, 'gain'); if isempty(gain) gain = 1.0; utils.helper.msg(msg.OPROC2, ['using default gain ' num2str(gain)]); end plo = append(plo, param('gain', gain)); % order order = find(pl, 'order'); if isempty(order) order = 1.0; utils.helper.msg(msg.OPROC2, ['using default order ' num2str(order)]); end plo = append(plo, param('order', order)); % fc fc = find(pl, 'fc'); if isempty(fc) if strcmp(type, 'bandreject') || strcmp(type, 'bandpass') fc = [0.1 0.25]; else fc = 0.1; end utils.helper.msg(msg.OPROC2, ['using default fc ' num2str(fc)]); end plo = append(plo, param('fc', fc)); % fs fs = find(pl, 'fs'); if isempty(fs) fs = 10*max(fc); warning([sprintf('!!! no sample rate specified. Designing for fs=%2.2fHz.', fs)... sprintf('\nThe filter will be redesigned later when used.')]); end % Increase fs until the cutoff is ok while fs < 2*fc fs = fs*2; end plo = append(plo, param('fs', fs)); % ripple ripple = find(pl, 'ripple'); if isempty(ripple) ripple = 0.5; utils.helper.msg(msg.OPROC2, ['using default ripple ' num2str(ripple)]); end plo = append(plo, param('ripple', ripple)); end