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LTE and LTE Testing
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LTE
(Long Term Evolution) and LTE Testing |
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LTE is
the first technology designed explicitly for Next Generation Networking
(NGN) and is set to become the de-facto NGN mobile access network standard.
It takes advantage of NGN capabilities to provide an always-on mobile data
experience comparable to wired networks. |
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- LTE
supports peak data rates of more than 100 Mbps on the downlink when
using 20 MHz channel bandwidth, two transmit antennas at the base station
and two receive antennas at the User Equipment (UE). LTE also supports
peak data rates of more than 50 Mbps on the uplink when using a 20 MHz
channel bandwidth; and single transmit antennas at the UE and base station.
- LTE
generates ten to twelve times the throughput on the downlink and eight
to ten times the throughput on the uplink relative to 3GPP Release 6.
- LTE
improves spectrum efficiency as defined relative to Release 6. The uplink
and downlink capabilities are two to four times the spectral efficiency
of High-Speed Packet Access (HSPA).
- LTE
has flexible duplex methods. Both Frequency Division Duplex (FDD) and
Time Division Duplex (TDD) are valid spectrum allocations and allow
LTE to accommodate various channel bandwidths in the available spectrum.
- LTE
interoperates with W-CDMA, GSM, and CDMA2000 systems. Multimode UEs
will support handover to and from these other systems.
- Legacy
technologies such as HSPA+ and Enhanced EDGE will continue to operate
within the new network architecture.
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FREE
LTE Resources - Get a better view of LTE with Anritsu |
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Predicted
LTE Specifications (Peak rates for E-UTRA FDD/TDD (baseline frame format))
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Downlink |
Uplink |
| Assumptions |
2
TX MIMO, 64 QAM, R = 1
10% reference signal overhead |
Single
TX UE, 16 QAM, R = 1
14% reference signal overhead |
| Unit |
Mbps
in 20 MHz |
b/s/Hz |
Mbps
in 20 MHz |
b/s/Hz |
| Requirement |
100 |
5.0 |
50 |
2.5 |
| Baseline
overhead (cyclic prefix, guard time, guard carriers and reference
symbols) |
182 |
9.1 |
57 |
2.9 |
| Full
mobility |
144 |
7.2 |
48 |
2.4 |
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| Downlink Key
Features |
Uplink Key
Features |
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- OFDM based, 15
kHz sub-carrier spacing
- QPSK, 16QAM, 64QAM
modulation
- Variable RF bandwidth,
1.4 - 20 MHz
- MIMO in the form
of transmit diversity or spatial multiplexing
- Scheduling, link
adaptation, HARQ and measurements similar to 3.5G
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- Single Carrier
FDMA, 15 kHz sub-carrier spacing
- QPSK, 16QAM, 64QAM
modulation
- Variable RF bandwidth,
1.4 - 20 MHz
- Scheduling, link
adaptation, HARQ and measurements similar to 3.5G
- Random access procedures
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LTE standards
support the use of both TDD (Time Domain Duplex) and FDD (Frequency Domain
Duplex) from the same set of standards, and with the same air interface
characteristics (as far as possible).
Multiple
Input Multiple Out (MIMO)
This is an antenna
technology together with signal processing that can increase capacity
in a radio link. In LTE using 2x2 MIMO, the user data is separated into
2 data sets, and these are then fed to 2 separate TX antennas, and received
by 2 separate RX antenna. Thus the data is sent over 2 separate RF paths.
The algorithm used to split and then recombine the paths allows the
system to make use of the independence of these 2 paths (not the same
RF losses and interference on both) to get extra data throughput better
than just sending the same data and 2 paths. This is done by separating
the data sets in both space and time. The received signals are then
processed to be able to remove the effects of signal interference on
each, and thus creating 2 separate signal paths that occupy the same
RF bandwidth at the same time. This will then give a doubling of achievable
data rates and throughput. LTE also supports 4x2 MIMO, with 4 transmit
antenna and 2 receive antenna, still giving 2x data rate increase, but
improved diversity performance also.
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LTE
Downloads and News |
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Presentation
- Wireless Long Term Evolution (LTE), future broadband wireless
The talk will review the future direction for wireless cellular
communications, including the convergence with fixed line telecoms to form
the 'Next Generation Network' (NGN) concept. Then
we will look at the specific network architectures being developed and
technologies being implemented into future broadband wireless systems
(e.g. OFDMA & MIMO), and the challenges involved in combining RF communications
systems with IP networks to deliver future wireless services.
Find
out more
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LTE
Educast - Introduction to Long Term Evolution (LTE)
Stay up-to-date on the latest wireless technology with this timely, informative
introduction to Long Term Evolution (LTE). As networks continue to converge,
LTE is gaining ground as the defacto standard for next generation wireless
technology. This Educast provides an at-a-glance comparison of 3G and 3.5G
technologies as well as a technology roadmap to provide a clear picture
of the wireless evolution. |
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Anritsu
Solutions for LTE Testing |
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MD8430A
Signalling Tester - Mobile phones are evolving quickly into rich-content
multimedia terminals supporting high-speed communications based on the next-generation
LTE standard. The MD8430A Signalling Tester is an essential base station
simulator for developing LTE chipsets and mobile terminals. It is the perfect
test solution for bringing LTE terminals to market as quickly as possible
based on Anritsu’s extensive knowledge of 3G technologies.
Find out
more... |
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MF6900A
Fading Simulator - The MF6900A uses fully digital baseband processing
to assure fading processing with high reproducibility at the same settings
while greatly simplifying difficult MIMO power control and achieving high
accuracy.
Find out
more... |
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MS269XA Series Signal Analyzers - incorporates a Signal
Analyzer, Signal Generator (optional) and RNC Simulator (optional) in
a hassle free, plug and play, single box solution for next generation
signal analysis. Using an extendable module structure, a range of options
can be added according to your need. The MS2690A and MS2691A are suitable
for use across the mobile market, supporting GSM, GPRS, EDGE, W-CDMA,
WiMAX and HSPA. The MS269X series is also capable of LTE (Long Term Evolution)
and 4G application testing, setting standards for the future of mobile
devices.
Find
out more... |
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MG3700A
Vector Signal Generator - The MX370108A LTE IQproducer is PC
application software with a GUI for generating waveform patterns in
compliance with the 3GPP LTE FDD specifications in the 3GPP TS36.211,
TS36.212, and TS25.81 standards. Once created, the waveform pattern
file is downloaded to the MG3700A hard drive. Using the MG3700A, Vector
Signal Generator functionality, the files are loaded, selected, and
output as a modulated LTE signal..
Find out more...
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Handheld
LTE Base Station Measurement Suite - allows field engineers and
technicians to conduct the tests necessary for the proper deployment, installation,
and operation of LTE networks. The measurement suite is a set of optional
measurement capabilities for Anritsu’s industry leading MS272xB Spectrum
Master™, and MT8222A and MT8221B BTS Master™ handheld analyzers
that includes tests for RF signal parameters, modulation quality, and Over-the-Air
(OTA) scanning.
Find
out more... |
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