RECURSIVE CODE SCALE Russian patent published in 2012 - IPC H03M1/24 

FIELD: information technology.

SUBSTANCE: apparatus has a first information code track of length N=2ⁿ, n reader elements placed along said track with angular spacing δ=360°/N, a second information code track of length M=2^m, m reader elements placed along said track with angular spacing (δ+δ₂), where δ₂=360°/NM, a regular code track of length 2NM, uniformly quantised with sampling period δ_sk.=360^o/2NM, a reader element for the regular code track displaced from the first of n reader elements by an angular distance k=2eδ_sk.+(δ_sk/2), n additional reader elements displaced from the last of n reader elements by an angular distance k_n=(iδ+δ_sk) and placed along the first information code track with angular spacing equal to δ, m additional reader elements displaced from the first of m reader elements by an angular distance k_m=(j+m)δ+δ_sk., and placed along the second information code track with angular spacing (δ+δ₂), a code converter, an inverter, AND elements, OR elements and decoders.

EFFECT: simple recursive code scale.

1 dwg, 6 tbl