This blog covers topics centered on information infrastructure.
Literal
This blog [topic-は] information-infrastructure [object-を] center [as-とした] topics [object-を] is-taking-up.
~を中心とした (centered on) is a common pre-nominal modifier. 取り上げる (take up/feature) is standard for covering topics. インフラ is the abbreviated loanword for 'infrastructure.' トピック (topic) is a direct English loanword. ~ています marks the ongoing nature of the blog's coverage.