explained

  • Massive MIMO Explained. What the heck is it? (Updated September 2016)

    Marzetta Massive10x or 100x more wireless throughput using many antennas. Masayoshi Son at Softbank has just deployed the first commercial Massive MIMO systems. 100 systems, each with 128 antennas, are being deployed in Japan. The early results show 6-10X capacity improvements. Some of the world's best engineers - Henry Samueli, Andrea Goldsmith, Arogyaswami Paulraj, Vint Cerf - expect ultimately MIMO will yield a 50X improvement. (That's not guaranteed, of course.)

    Ericsson announced they'd be shipping 64 antenna systems in 2017. Huawei, ZTE, and Facebook have demonstrated 96-128 antenna systems. Each transmitting antenna sends a separate signal. The receivers mostly have two or four antennas. Each signal bounces off walls and other obstacles in a slightly different way, allowing the receivers to separate them. 

    Paulraj invented MIMO in 1993 and nearly twenty years ago predicted a 100X improvement in capacity at very little power increase. Many of us have seen a preview of what's possible from WiFi 802.11ac. That uses 4 antennas and triples performance under the right conditions. Add more antennas and enough processing power and almost anything may be achievable. 

5GW News

dave rightStarting July 2017, all new articles are at wirelessone.news. The pols and the marketing folks have made "5G" a meaningless term so the name doesn't fit reporting on advanced wireless. This will stay so old links work. I've reported broadband since 1999 and now is the time for gigabit wireless. Catch a mistake or have news? Email me please. Dave Burstein