A class of composite codes (Corresp.)

Certain useful properties of the cyclic code
V
are discussed with words
V(x)=V_{1}(x)(l+x^{n})/(l+x^{n_{1}})+V_{2}(x)(l+x^{n})/(l+x^{n_{2}})
, where for
i=1,2,V_{i}(x)
belongs to a binary code
V_{i}
of length
n_{i}
.