Woven Coded CPFSK With Hierarchical Code Structure

We introduce hierarchical woven coded continuous phase frequency-shift keying (hierarchical WCCPFSK) as the serial concatenation of different outer convolutional codes and inner CPFSK. We compare it to WCCPFSK with identical outer convolutional codes. With the proposed code combinations, hierarchical WCCPFSK achieves superior decoding capability. Simulations show that it performs better at medium SNRs.