Wednesday, February 17, 2016

Cohere’s OTFS Scales MIMO without Signal Drop

Cohere Technologies, a start-up based in Santa Clara, California, has validated the ability of its Orthogonal Time Frequency and Space (OTFS) to consistently maintain high-speed connectivity, even when encountering the most difficult scenarios for wireless networking. The company said its OTFS outperformed all other modulation schemes that were tested, and was able to extract high-speed capacity that perfectly scaled with the addition of additional antennas.

Cohere claims its new OTFS modulation scheme delivers 100 percent coverage, 10x spectral efficiency and a 50 percent cost savings over existing solutions by perfectly capturing the wireless channel. Combined with traditional modulation schemes, OTFS extends the benefits of this 2D modulation to existing platforms.

The recent trials, which were conducted in partnership with wireless operators, used currently available MIMO radios with 2 x 2 and 4 x 4 antenna arrays. The tests spanned urban settings with tall buildings, mountainous regions, rural settings and moving vehicles, all at various distances, with and without line-of-site configurations. While OFDM-based radios used for comparison would fade, drop signals or lose capacity, the OTFS radios never faded – even at distances beyond 4 km – and maintained connectivity, even in the most challenging mobile scenarios. The tests were able to maintain a minimum of 4bps/Hz in 10MHz achieving at least 120 Mbps up to 320Mbps.

Cohere also noted that it is preparing to produce Massive MIMO radios that include 64 x 64 antenna arrays.

  • Cohere is headed by Shlomo Rakib, who previously was President and CTO of Terayon Communications.