CR regular embeddings of $S^{4n-1}$ in ${\mathbb{C}}^{2n+1}$

Ahern and Rudin have given an explicit construction of a totally real embedding of $S^3$ in ${\mathbb{C}}^3$. As a generalization of their example, we give an explicit example of a CR regular embedding of $S^{4n-1}$ in ${\mathbb{C}}^{2n+1}$. Consequently, we show that the odd dimensional sphere $S^{2m-1}$ with $m>1$ admits a CR regular embedding in ${\mathbb{C}}^{m+1}$ if and only if $m$ is even.