scan array with given scanning phase
ascan = scan(a, ps0)
array weights to be scanned (must be row vector)
scanning phase in radians
scanned weights (row vector)
scan(a, ps0) can be used to scan array with given scanning phase. multiplies array weights by progressive phase, ascan(n) = a(n) * exp(-j*(n-(N-1)/2)*ps0), n = 0,1,...,N-1. ps0 can be any phase, even outside visible region. steer is a special case of SCAN, that is, steer(d, a, ph0) = scan(a, 2*pi*d*cos(ph0))
add sample pgm