R&S®FSQ-K102 Analysis of EUTRA/LTE Downlink MIMO Signals

3GPP LTE transmitter measurements on base stations and modules with the R&S®FSG and R&S®FSQ Signal Analyzer

  • Overview

Key Facts

  • Quick overview of most important measurement results
  • Advanced analysis of radio frame, subframe, resource blocks, and channels

Brief Description

The R&S®FSQ-K102 software enhances the R&S®FSQ and R&S®FSG analyzers for transmitter measurements on 3GPP Long Term Evolution (LTE) base stations.

Features

  • Large number of possibilities to determine the performance of the transmitter
  • Quick analysis of transmitter performance by controlling the demodulator

Supported Technologies

  • UMTS Long Term Evolution (LTE)
  • Deployment
  • OFDMA
  • SC-FDMA
  • MIMO

Key Facts

  • Quick overview of most important measurement results
  • Advanced analysis of radio frame, subframe, resource blocks, and channels
  • Autodetection of modulation formats
  • EVM <1 %

Brief Description

The R&S®FSQ-K102 software enhances the R&S®FSQ and R&S®FSG analyzers for transmitter measurements on 3GPP Long Term Evolution (LTE) base stations. Analysis of MIMO transmitters provides more insight into the performance of the complete base station.

The software analyzes the modulation quality, e.g. EVM or I/Q imbalance, of 3GPP EUTRA FDD signals in downlink. When combining two or up to four signal analyzers, these tasks can even be performed on MIMO transmitters.

R&S®FSQ-K102 analyzes all LTE modulation types: BPSK, QPSK, 16QAM, and 64QAM. The user can define all bandwidths within a range of 1.4 MHz to 20 MHz.

Features & Benefits

Large number of possibilities to determine the performance of the transmitter

A summary of the transmitter performance is displayed in a table, providing a quick overview. As the LTE signals are highly complex (e.g. one frame of a 10 MHz signal may contain over 80000 different error vector magnitude results), graphical displays are more suited to quickly locate performance trouble spots in the transmitter. R&S®FSQ-K102 provides an abundance of graphical displays.

Quick analysis of transmitter performance by controlling the demodulator

After a performance problem has been identified, it is helpful in fault finding to change the settings of the demodulator. The captured data can be analyzed again, which ensures that any sporadic problem will be analyzed in detail as soon as it has been captured by the R&S®FSQ-K102 software.

Spectrum emission mask and adjacent channel leakage power measurement included for ease of use

R&S®FSQ-K102 includes all the settings to perform the spectral measurements required by the standard. The measurements are automatically configured by means of a few settings.

Automate your measurement

No matter whether R&S®FSQ-K102 is installed on the instrument or on an external PC, the measurements can be fully automated by using well-known SCPI commands. This makes R&S®FSQ-K102 ideal for use in automated test systems.

Supported Technologies

UMTS Long Term Evolution (LTE)

UMTS LTE is to ensure the competitiveness of UMTS for the next ten years and beyond and to provide a low-latency and packet-optimized system with high data rate. LTE is also known as EUTRA (Evolved UMTS Terrestrial Radio Access) and EUTRAN (Evolved UMTS Terrestrial Radio Access Network). Besides peak data rates of 100 Mbps in the downlink and 50 Mbps in the uplink, a significant increase in spectrum efficiency and capacity as well as a significant latency reduction are planned.

Deployment

EUTRAN can be deployed as a standalone network, but integration with existing UMTS and GSM/GPRS/EDGE networks is a major deployment scenario as well.

OFDMA

Orthogonal frequency division multiple access is a multiuser version of the orthogonal frequency division multiplexing (OFDM) digital modulation scheme. OFDMA systems use a large number of closely spaced carriers to transmit data. Each carrier transmits at a much lower data rate than the complete system, and is therefore less susceptible to the distortions that may occur in the RF channel. The OFDMA modulation scheme is used in the downlink of LTE.

SC-FDMA

Single-carrier frequency division multiple access is the modulation format used in the uplink. It is closely related to OFDMA but has a lower peak-to-average ratio and has been chosen by the standardization committee because this feature will lead to better efficiency in the user equipment.

MIMO

MIMO is the use of multiple antennas at both the transmitter and receiver to improve communications performance. It offers significant increases in data throughput and link range without additional bandwidth or transmit power. MIMO can be subdivided into three main categories, i.e. precoding, spatial multiplexing, and diversity coding.

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