Agilent Creating and Analyzing Custom OFDM Waveforms for Software-Defined Radio (SDR) - Application Note 599 free download

File name Creating and Analyzing Custom OFDM Waveforms for Software-Defined Radio (SDR) - Application Note 599

Keysight Technologies Solutions for Creating and Analyzing Custom OFDM Waveforms for Software-Defined Radio (SDR) Application Brief 02 | Keysight | Solutions for Creating and Analyzing Custom OFDM Waveforms for Software-Defined Radio (SDR) - Application Brief Many of today's commercial wireless standards are based on a highly versatile transmission scheme: orthogonal frequency-division multiplexing (OFDM). Additionally, a method to enable multiple users on the same OFDM spectral channel is employed called orthogonal frequency-division multiple-access (OFDMA). Examples include 802.11a/g/n, 802.11ac/ad, 802.16e WiMAX, FDD-LTE, TDD-LTE and LTE-Advanced. OFDM and OFDMA technologies provide important advantages in four areas: data throughput, spectral efficiency and scalability, data integrity, and waveform robustness in the presence of multipath fading. In addition, both technologies have the potential to be customized to suit the needs of proprietary applications. For these reasons and more, OFDM and OFDMA are viewed as viable technologies for the development of communications systems including software-defined radio (SDR) and cognitive radio. The more successfully these technologies can be deployed, the easier it will be to achieve seamless communication and coordination between diverse public-safety agencies or military forces. Because OFDM and OFDMA technologies are complex, they pose many challenges in the development process. Fortunately, development can be accelerated by design and test tools that simplify the creation, simulation, generation and analysis of standard or proprietary OFDM and OFDMA waveforms. For device testing, waveforms can be created using the Keysight Technologies, Inc. SystemVue electronic system level (ESL) design software and downloaded to an Keysight high-precision arbitrary waveform generator (AWG). Vector signal generators such as the Keysight MXG offers an internal AWG with modulation bandwidth to 160 MHz that can be used to produce gigahertz-range carrier signals modulated with custom or standardized waveforms. On the analysis side, single- input/single-output (SISO) and multiple-input/multiple-output (MIMO) measurements are possible. For example, SISO measurements of custom OFDM waveforms can be made with an Keysight X-Series RF signal analyzer or an Infiniium 90000 X-Series high-performance digital oscilloscope coupled with the Keysight 89600 vector signal analysis (VSA) software. Additionally the oscilloscope