Three communications equipment stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

This week, MRV Communications, Inc. (MRVC) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. For more information, get Portfolio Grader’s complete analysis of MRVC stock.

Nokia Oyj Sponsored ADR (NOK) is making progress this week as its rating of C (“hold”) from last week increases to a B (“buy”) rating this week. Nokia makes mobile devices and offers Internet services that allow people to access music, maps, media, messaging and games. For more information, get Portfolio Grader’s complete analysis of NOK stock.

Novatel Wireless, Inc. (NVTL) earns a B this week, jumping up from last week’s grade of C. Novatel Wireless provides wireless data modems and software for use with handheld computing devices and portable personal electronics. For more information, get Portfolio Grader’s complete analysis of NVTL stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.