Being many technologies in wireless field, the effective technology which is useful for occupying the unused spectrum is Cognitive Radio Networks (CRNs). Implementing CRNs with the Ad-HOC is a new try to show the better performance of CRN in Ad-HOC to provide reliable point to point transmission. In this paper we proposed a new encoding scheme Alteration Routing Code (ARC) with Routing Array (RA) where the control overhead and data transmission complexity has become drastically low. Another advantage is, implementing Constrained Sphere Decoder (CSD) as a decoding scheme which is helpful in tree search with the help of Higher Posterior Probability (HPP). This helps in identifying the path accessing order. Simulations and numerical analysis are performed to show the superior performance of the routing theory.
