毕业设计&课设-自适应数字波束成形项目的Matlab仿真库.zip

classdef Array < handle % A linear receiver array of arbitrary count, spacing, % pose (from centroid), wave propogation speed, % wavelength (for target center freq.), sampling frequency, % and dynamically-applied array complex weights properties % public, required constructor params wavelength numSensors spacing pose % class containing position (m) and orientation (rad) members fs % sampling frequency (hz) end properties (Constant) c=3e8; end properties (GetAccess=private) weights % amplitude and phase modifier for each receiver end methods function this = Array(wavelength, numSensors, spacing, pose, fs) this.wavelength = wavelength; this.numSensors = numSensors; this.spacing = spacing; this.pose = pose; this.fs = fs; end % return vector of Sensor objects with x/y positions function sensors = sensors(this) % init empty array of sensor objects sensors(1,this.numSensors) = Sensor(); % populate all sensor objects for i=1:this.numSensors sensors(i) = this.makeSensor(i - 1); end end % calculate the current x and y position and return in Sensor % @param sensorIndex is 0-based index function s = makeSensor(this, sensorIndex) % vector colinear with array, in direction of highest index sensor, % of magnitude 1-sensor spacing v = this.getBasis(); % +/- offset of sensor steps from array centroid % start offset assuming odd number of sensors offsetFromCentroid = this.getOffsetFromCentroid(sensorIndex); % get vector from centroid to sensor centroidToSensor = offsetFromCentroid * v; % set return value using abs + relative positions sensorAbsX = centroidToSensor(1) + this.pose.x; sensorAbsY = centroidToSensor(2) + this.pose.y; s = Sensor(sensorAbsX, sensorAbsY); end % @brief Returns a vector that's a basis for the array-line, with % length of 1 spacing step, allowing multiplication by discrete % sensors steps forward or backward to get position relative to % array centroid function v = getBasis(this) % get relative position, one sensor down the straight array deltaX = cos(this.pose.theta) * this.spacing; deltaY = sin(this.pose.theta) * this.spacing; % return it v = [deltaX, deltaY]; end % @brief Returns the number of sensor-spacing steps from centroid to a % sensor index (with 0 being the first in the array) function o = getOffsetFromCentroid(this, sensorIndex) % +/- offset of sensor steps from array centroid % start offset assuming odd number of sensors o = sensorIndex - (this.numSensors - 1)/2; % then add or subtract .5 sensor spacing if even (if before or % after centroid) if mod(this.numSensors, 2) == 0 if (sensorIndex < (this.numSensors - 1)/2) % even and before centroid o = o + .5; else % even and after centroid o = o - .5; end end end end end