  In the first part of the paper kernels are constructed which meromorphically
extend the Macdonald-Koornwinder polynomials in their degrees. In the second
part of the paper the kernels associated with rank one root systems are used to
define nonsymmetric variants of the spherical Fourier transform on the quantum
SU(1,1) group. Related Plancherel and inversion formulas are derived using
double affine Hecke algebra techniques.
