LTE (Long Term Evolution) and LTE Testing
	The LTE specification is currently being developed, with release of the air interface physical layer achieved at the end of 2007, and the protocol layers expected by the end of 2008. LTE will provide an all-new wireless communication technology that adopts new techniques such as OFDMA and MIMO for its wireless system and is based on an all IP network. Anritsu has been participating actively in the 3GPP standardization of these new technologies at the same time as working closely with the major infra-structure, chipset and terminal developers. By taking this approach Anritsu will uniquely provide market-leading LTE test solutions, on time, to assist our customers in meeting their goals. Release 7 of 3GPP includes study items to introduce MIMO and 64QAM as transmission technologies to increase data rate of the air interface, and IMS phase 2 introduces all IP network capability. This will reach the limit of what is possible in data rates for the existing 3G networks based on 5 MHz W-CDMA technology. Release 7 has been designed as an upgrade for existing HSPA networks, and is sometimes called "HSPA+”, or “evolved HSPA”. Beyond Release 7, 3GPP is now developing the standards for a new mobile network, and this is called the Long Term Evolution (LTE) and System Architecture Evolution (SAE) for next generation mobile networks. This is the next step in the continuous move to wider bandwidth and higher data rates. LTE and SAE are specified within 3GPP as part of the Release 8 version of specifications within the 36.xxx series of specifications.
	Article Reprint Microwave Engineering Europe - RF Testing of OFDMA in LTE Base Stations	Poster LTE Technology Reference	White Paper Future Technologies for Fixed Mobile Convergence, SAE and LTE in Cellular Mobile Communications

		Predicted LTE Specifications (Peak rates for E-UTRA FDD/TDD (baseline frame format)) 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 The key features of the LTE air interface are: Downlink OFDM based, 15 kHz carrier spacing BPSK, QPSK, 16QAM, 64QAM modulation. Variable system bandwidth, 1.4 – 20 MHz. MIMO and transmit diversity MBMS Scheduling, link adaptation, HARQ and measurements like in 3.5G Uplink Single Carrier FDMA, 15 KHz carrier spacing BPSK, QPSK, 16QAM, 64QAM modulation # Variable system bandwidth, 1.4 – 20 MHz. Scheduling, link adaptation, HARQ and measurements like in 3.5G Random Access Procedures TDD/FDD Access 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.

	LTE Downloads and News
		Downloads LTE White Paper - Future Technologies for Fixed Mobile Convergence, SAE and LTE in Cellular Mobile Communications LTE Technology Reference Poster Application Note - Making PHY Measurements on Mobile WiMAX Devices	News Anritsu leads testing of emerging technologies supporting the evolution of Next Generation Mobile Communications New Software Support for 3GPP LTE Testing

	Anritsu Solutions for LTE Testing
		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...
		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...