Signals Ahead: Finding MIMO - 4x4 MIMO Benchmark Study

  • ID: 4032338
  • Report
  • Region: Global
  • 49 Pages
  • Signals Research Group, LLC
1 of 5
Quantifying the Impact of 4x4 MIMO in a Commercial LTENetwork

FEATURED COMPANIES

  • Accuver Americas
  • Nokia
  • Samsung
  • T-Mobile
  • MORE

In this Signals Ahead report we provide the results from the industry's first and only independent performance analysis of 4x4 MIMO. For this study we used the T-Mobile commercial LTE network in the Minneapolis market where Nokia is the infrastructure supplier.
 
Highlights of the Report include the following:

Our Thanks

This study could not have been done without the support of Accuver Americas, who provided us with its XCAL-M drive test tool as well as its XCAP post-processing solution to analyze the data that we collected.

Our Approach

We burned through more than 9 SIM cards (28GB each) while transferring data on Samsung Galaxy S7 smartphones. We purchased one S7 from a T-Mobile store. This phone supported 4x4MIMO, 256-QAM, and a 4-way receive antenna architecture, as well as uplink64-QAM. We also purchased an unlocked S7 from a Best Buy store. This phone did not support any of these features. We configured the phones so that they only operated in Band 4 to maximize the potential use of 4x4 MIMO. We used the Datum application from Spirent Communications in order to generate the downlink and uplink traffic.

The Tease

Over the course of all testing, including various morphologies and clusters of 4x4 and 2x2 MIMO sites, we observed that the median downlink data rate for the T-Mobile S7 was 55% higher than the Best Buy S7.

The Detailed Analysis

In the main body of the report we analyze the performance differences between the two smartphones in excruciating detail. We quantify the incremental benefits of RI = 3/4only, 256-QAM only, and mixed use of 256-QAM and RI = 3/4, as well as the benefits of a 4-way receive antenna architecture.

What about Power?

We quantify how the LTE-Advanced features that we tested impacted battery life, including normalized results which take into consideration differences in measured data speeds.
 
What about the Uplink?

Following our major study of uplink performance, based on testing in Seoul, South Korea, we revisit the impact of uplink 64-QAM on the uplink performance with a particular focus on the probability that the mobile device uses the higher modulation scheme. The findings are surprising.

- SIGNALS AHEAD SUBSCRIPTION INFORMATION

This report is included as part of a subscription to Signals Ahead or it can be purchased separately.

Signals Ahead is a research-focused product that is published on a periodic basis. Its clientele include all facets of the wireless ecosystem, including some of the largest mobile operators, the top handset suppliers, the major infrastructure vendors, subsystem suppliers, semiconductor companies and financial institutions, including Wall Street, Private Equity and Venture Capitalists, spread across five continent

READ MORE
Note: Product cover images may vary from those shown
2 of 5

FEATURED COMPANIES

  • Accuver Americas
  • Nokia
  • Samsung
  • T-Mobile
  • MORE

1.0 Executive Summary
2.0 Key Observations
3.0 North of MSP Airport (4x4 MIMO)
4.0 Rural America (4x4 MIMO)
5.0 West Suburbs (2x2 MIMO)
6.0 The Impact on Battery Life
7.0 Uplink Performance Analysis
8.0 Test Methodology
9.0 Final Thoughts

List of Figures & Tables

Figure 1. Aggregate Comparison of Results - Band 4 Only
Figure 2. Geo Plot of Rank Indicator Reports - Best Buy S7
Figure 3. Geo Plot of Rank Indicator Reports - T-Mobile S7
Figure 4. Physical Layer Throughput Comparison
Figure 5. Physical Layer Throughput Cumulative Distribution
Figure 6. Physical Layer Throughput Versus RSRP
Figure 7. Rank Indicator Reports Versus RSRP
Figure 8. Performance Gain and Probability Analysis - 256-QAM and Rank Indicator = 3
Figure 9. Performance Gain and Probability Analysis - 256-QAM and Rank Indicator = 3 (Limited)
Figure 10. Combined Throughput and Combined RB Adjusted Throughput versus RSRP with Probability Analysis
Figure 11. MCS Reports versus RSRP Analysis
Figure 12. Median MCS Values and Rank Indicator Analysis - RSRP > -75 dBm
Figure 13. 256-QAM versus Rank Indictor =3 Performance Comparison - RSRP > -75 dBm
Figure 14. Median MCS Values - Long Pine Cell Site
Figure 15. Physical Layer Throughput and RB Allocations - Long Pine Cell Site
Figure 16. Median SINR and CQI Values - RSRP > -75 dBm
Figure 17. RSRP Distribution - by Antenna
Figure 18. Median RSRP Values for each Antenna - by RI=3 Utilization Rates
Figure 19. Median RSRP Values for each Antenna - by RI=3 Utilization Rates
Figure 20. Physical Layer Throughput, RI=3 Utilization and 256-QAM Utilization Time Series
Figure 21. Physical Layer Throughput, RI=3 Utilization and 256-QAM Utilization Time Series Plot
Figure 22. Physical Layer Throughput, RI=3 Utilization and 256-QAM Utilization Time Series Plot
Figure 23. Geo Plot of Rank Indicator Reports - no 256-QAM
Figure 24. Geo Plot of Rank Indicator Reports - with 256-QAM enabled
Figure 25. Physical Layer Data Rates - T-Mobile S7 (Band 4 Only)
Figure 26. Geo Plot of Rank Indicator Reports - T-Mobile S7
Figure 26. Geo Plot of Rank Indicator Reports - T-Mobile S7
Figure 28. Physical Layer Throughput Comparison
Figure 29. Physical Layer Throughput Cumulative Distribution
Figure 30. Physical Layer Throughput Versus RSRP
Figure 31. Rank Indicator Reports Versus RSRP
Figure 32. Performance Gain and Probability Analysis - 256-QAM and Rank Indicator = 3
Figure 33. Performance Gain and Probability Analysis - 256-QAM and Rank Indicator = 3 (Limited)
Figure 34. Geo Plot of Rank Indicator Reports - Best Buy S7
Figure 35. Geo Plot of Rank Indicator Reports - T-Mobile S7
Figure 36. Physical Layer Throughput Comparison
Figure 37. Physical Layer Throughput Cumulative Distribution
Figure 38. Physical Layer Throughput Versus RSRP
Figure 39. Rank Indicator Reports Versus RSRP
Figure 40. Performance Gain and Probability Analysis - 256-QAM and Rank Indicator = 3
Figure 41. Performance Gain and Probability Analysis - 256-QAM and Rank Indicator = 3
Figure 42. Power Consumption - by scenario
Figure 43. Physical Layer Throughput - by scenario
Figure 44. Total Power Consumption Normalized to Physical Layer Throughput - by scenario
Figure 45. Geo Plot of Uplink 64-QAM Modulation
Figure 46. Average Uplink Data Rate
Figure 47. Distribution of Uplink Modulation Schemes
Figure 48. Distribution of Frequency Band
Figure 49. XCAL-M in Action

Note: Product cover images may vary from those shown
3 of 5

Loading
LOADING...

4 of 5
  • Accuver Americas
  • Nokia
  • Samsung
  • T-Mobile
Note: Product cover images may vary from those shown
5 of 5
Note: Product cover images may vary from those shown
Adroll
adroll