Agilent Multichannel Measurements in MIMO 802.11ac Baseband IQ Simulation 252C Design & Test - Application N free download

File name Multichannel Measurements in MIMO 802.11ac Baseband IQ Simulation_252C Design & Test - Application N

Keysight Technologies Measurement Solutions for Multichannel Applications Application Note Abstract Application Overview The ever-increasing demand for consumer devices that New requirements for multichannel applications require a support wireless LAN (WLAN), including cell phones, wideband test solution capable of analyzing at least 3 to tablets, and game consoles, is driving the need for the 4 BBIQ channels with highly accurate EVM performance. rapid deployment of new wireless technologies such as Extending previous 2-channel test solutions to support 802.11ac. 802.11ac requirements for 160 MHz bandwidth testing can be complex; therefore, the ability to create and While 802.11ac will add signifi cant value to customers and analyze MIMO signals during the research and develop- end-users, it brings with it new design and test challenges ment (R&D) test phase is an essential component of an 802.11ac test solution. As higher-order modulation of 256 for systems engineers such as much wider bandwidth QAM necessitates the demand for better EVM perfor- signals of 160 MHz, as well as the need for better error mance (-32 dB), a test solution must also be capable vector magnitude (EVM) performance to support 256 QAM. of providing accurate EVM performance results. The requirement for MIMO implies that test equipment must Accelerate system simulation, design, and test for 802.11ac support up to 8 channels for the capture and generation with Keysight Technologies, Inc. RF vector signal generator, of signals to and from the 802.11ac device. To test the multichannel digitizer, and vector signal analysis (VSA) optional beamforming functions in the standard, the chan- software that provide a complete BBIQ solution for mul- nels also need to be phase-coherent. As we look towards tiuser, multiple-input, multiple-output (MU-MIMO) analysis. the future, test systems must be flexible enough to evolve with WLAN test standards which may require support for With approximately 500 million 802.11ac devices expected bandwidths up to 500 MHz. to reach the market by 2015, device manufacturers require a cost-effective and effi cient solution for wideband testing of multichannel applications with accurate EVM analysis.