Question

Develop two different 4-bits unit distance codes​

Answer 1

Explanation:

The Gray code is a single-step code (i.e. a unit-distance code). It's often used in analog/digital conversion devices. Adjacent code patterns of Gray code differ in just only one bit to avoid ambiguity, i.e. consecutive code elements have a hamming distance of one.

Errors while read off, for example by oblique scanners, slightly different threasure values inside the detectors, delay and race conditions in logical circuits only give minimal effects while using Gray code.