|By Business Wire||
|July 14, 2014 10:58 AM EDT||
Research and Markets (http://www.researchandmarkets.com/research/j7hsc9/signals_ahead_by) has announced the addition of the "Signals Ahead: By the Light of the Silvery Moon" report to their offering.
When operators first launched LTE starting back in late 2009 they used a standard 2x2 MIMO implementation, meaning two transmit / receive antennas at the cell site and two receive antennas in the mobile devices. And until last year they also relied on Cat 3 (Category 3) devices which under certain circumstances became the bottleneck that limited downlink data rates in a 2x20 MHz network. The resultant data rates were still very impressive and dramatically higher than they were with DC-HSDPA - thanks, in large part to the wider channel bandwidths - but in hindsight they could have been even better.
Thanks to the technology advancements that the industry has made for infrastructure and devices / chipsets and the initiatives taken by some forward-thinking operators, LTE is undergoing another round of performance improvements. It is also providing many of these improvements under the auspices of the Release 8 standard. One noteworthy example, which also happens to be the subject of this Signals Ahead report, is the introduction of 4x2 antenna schemes.
KEY OBSERVATIONS INCLUDE THE FOLLOWING:
- The benefits of 2x20 MHz LTE, a Category 4 smartphone, and 4x2 CL- MIMO cannot be ignored
- Peak data rate of 143.8 Mbps in the downlink (per TTI) and 46.93 Mbps in the uplink (per second)
- The median MAC (Media Access Control) Layer downlink throughput was 36.42 Mbps and the median MAC Layer uplink throughput was 28.15 Mbps - both values include 2x2 OL-MIMO results
- The downlink throughput exceeded 10 Mbps for nearly 95% of the time and the uplink throughput exceeded 10 Mbps for 87% of the time - both values include 2x2 OL-MIMO results
- The clincher for bullish views on a 4x2 cell site configuration appears after we filter the 4x2 and 2x2 results.
- Substantially higher uplink user data rates, in particular closer to the cell edge
- Far more efficient scheduling of uplink network resources, again when the mobile device was closer to the edge of cell
- A clear indication of improved battery life throughout a large portion of the cell
- Meaningful improvements in downlink data rates near the edge of the cell
- Consistent with our earlier study, 4x2 CL-MIMO delivers strong gains versus transmit diversity for a wide range of network conditions - perhaps even a greater range than we previously observed with 2x2 OL-MIMO.
Key Topics Covered:
1.0 Executive Summary
2.0 Key Conclusions and Observations
3.0 Detailed Results - Uplink Performance
4.0 Detailed Results - Downlink Performance (4x2 CL-MIMO versus 2x2 OL-MIMO)
5.0 Detailed Results - Downlink Performance (4x2 CL-MIMO versus 4x2 Transmit Diversity)
6.0 Test Methodology
7.0 Final Thoughts
For more information visit http://www.researchandmarkets.com/research/j7hsc9/signals_ahead_by
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