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Select Help > Open Examples... from the menus and type either the example name listed above or one of the keywords below.

Or in Version 13 14 or higher you can open the project directly from this page using this button. Make sure to select the Enable Guided Help before clicking this button.

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This example demonstrates:

            LTE FDD Downlink TX, compliant with 3GPP specifications.

            Specification document: TS 36.104, TS 36.211, TS 36.212

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Configurable options include:

NFramesSweep: number of 10ms frames used in each sweep

FrameType: frame type and cycling preffix:

            - 0: Frame structure type 1 / Normal CP: FDD

            - 1: Frame structure type 2 / Normal CP: TDD

            - 2: Frame structure type 1 / Extended CP: FDD

            - 3: Frame structure type 2 / Extended CP: TDD

ModType: modulation type used in data channels (QPSK, 16QAM, 64QAM)

N_RB_DL: number or resource blocks used for transmission

nAntennaPorts: number of antenna ports (1, 2 or 4)

Carrier Frequency (MHz)

TxOutLvlStart, TxOutLvlSpan, TxOutLvlStep (dBm): Define swept power of transmitted signal

UL_DL_Config: Uplink/Downlink Configuration for TDD (0, 1, 2, 3, 4, 5 or 6)

PTS_Format: Pilot Time Slot Format for TDD (0, 1, 2, 3, 4, 5, 6, 7 or 8)

The test bench can be used to monitor:

The CCDF at the input and output of DUT

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The TX signal spectrum at the input and output of DUT

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EVM %rms vs. output power

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The impact of phase noise on EVM

The impact of phase/amplitude and DC offset on EVM

ACPR

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N_RB_DL defines the channel bandwith as defined in the specifications (See Global Definitions for relationship between N_RB_DL and channel BW).

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Please read the online help for information on any of the blocks that are used in the system diagrams. In addition, please read the online help for ACPR and EVM measurements.

System Diagram - LTE DL

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Graph - Power Levels

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Graph - ACPR

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Graph - CCDF

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Graph - AM to AM

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Graph - IQ Constellation

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Graph - Spectrum

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Graph - EVM vs Output Power

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