This document proposes a smart small cell concept using hybrid beamforming to enhance network capacity for 5G. It discusses requirements for 5G including high data rates and connections. Hybrid beamforming combines analog and digital beamforming to reduce complexity. The document describes a testbed using SDR and antenna array to implement 3D hybrid beamforming in small cells. System simulations using a 3D ray tracing tool show gains over LTE networks. Evaluation results examined link and system performances, and the conclusion is the smart small cell can support 5G networks based on SDR testbed and simulation results.

1. Smart Small Cell with
Hybrid Beamforming
for 5G
Presented by
G.BHASKAR
15341A0465

2. CONTENTS
1. Abstract
2. Introduction to 5G
3. Hybrid beamforming
4. Smart small cell concept
5. SDR Testbed Tx and Rx blocks
6. Experimental setup
7. Evaluation results
8. conclusion

3. ABSTRACT
The overall capacity of the small cell network can be enhanced with the
enabling technology of 3D hybrid beamforming. It can be done through
the implementation of a real time testbed using a software-defined
radio (SDR) platform and fabricated antenna array. we also investigate
system-level performances to verify the gain of the proposed smart
small cell system over long term evolution (LTE) systems by performing
system-level simulations based on a 3D ray-tracing tool.

4. REQUIREMENTS FOR 5G STANDARD TO FULLFILL
 Data rates >100 mbps in urban areas
 1 Gbps for offices
 simultaneous connections for wireless sensors
 Spectral efficiency significantly enhanced
 Coverage improved
 Latency reduced

5. Technologies available for 5G networks
 Millimetre waves
 Small cells
 Massive MIMO
 Beamforming
 Full duplex

6. • Beamforming or spatial filtering is a signal processing technique
used in sensor arrays for directional signal transmission or
reception.
• Hybrid beamforming = (analog + digital) beamforming.
• Analog beamforming maximizes avg SNR
• Digital beamforming provides spatial multiplexing.
• We go for hybrid beamforming to reduce RF chains and complexity
and it also reduce cost.
BEAMFORMING

7. • The proposed 3D hybrid beamforming
system can enhance the area spectral
efficiency of the 5G small cell network
tremendously.
• 3D hybrid beamforming system consists
M RF chains and N antenna elements.

8. Smart small cell concept
• small cells are low-powered cellular radio
access nodes.
• It is proposed particularly for millimetre
wave communications.
• Mobile operators use them to extend
their service coverage.

9. • In this article they examined link and system level performances of the proposed
smart small cell system
• link level – software defined radio(SDR) testbed
• System level – 3D ray tracing based simulation
• Here they calculated the SNR and beam weight and average data rates for the
system.

13. Evaluation results

14. CONCLUSION
This article has proposed a smart small cell concept to play a key role in supporting
5G networks. Based on the measured data through the SDR testbed, authors also
performed 3D ray-tracing based system-level simulations to investigate the system-
level potential gain of the proposed smart small cell system.

15. REFERENCES
[1] Cisco Visual Networking Index, “Cisco Visual Networking Index:
Global Mobile Data Traffic Forecast Update, 2014–2019,” Feb. 2015.
[2] ICT-317669 METI2015S project, “METIS final project report,” Del. D8.4,
Apr..
[3] 5G Forum, “5G Vision, Requirements, and Enabling Technologies,”
V.1.0, Feb. 2015.
[4] J. Andrews, F. Baccelli , and R. Ganti , “A tractable approach to coverage
and rate in cellular networks,” IEEE Trans. Comm., vol. 59, no. 11, pp.
3122–3134, Nov. 2011.
[5] Y. Kim, H. Ji, J. Lee, Y.-H. Nam, B. L. Ng, I. Tzanidis, Y. Li, and
J. Zhang, “Full dimension MIMO (FD-MIMO): The next evolution of
MIMO in LTE systems,” IEEE Wireless Comm. Mag., vol. 21, no. 3,
pp. 92–100, Jun. 2014.

16. THANK YOU