Decoding Technique of Concatenated Hadamard Codes and Its Performance

摘要

The decoding technique of concatenated Hadamard codes and its performance are studied. Efficient soft- in-soft-out decoding algorithms based on the fast Hadamard transform are developed. Performance required by CD- MA mobile or PCS speech services, e.g., BER=10~-3, can be achieved at Eb/No=0.9 dB using short interleav- Ing length of 192 bits.