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This tutorial offers an explanation of the concepts behind orthogonal frequency division multiplexing (OFDM).
On-demand courses are now available from Besser Associates. Tutorials and courses range from one to eight hours in length. Topics include:
Instructor Steve Best has a new article in the recent issue of IEEE Antennas and Propagation magazine titled, Electrically Small Resonant Planar Antennas: Optimizing the Quality Factor and Bandwidth. You must be a member of the IEEE Antennas and Propagation society for free access to the article.
Instructor Waleed Khalil has co-published a couple of new papers that are freely accessible in the IEEE Access publication.
The first one is Phase Error Evaluation in a Two-Path Receiver Front-End With On-Site Coding:
Instructor Ali Darwish has co-authored a couple of new papers recently. The most recent one, A Broadband 1-to- N Power Divider/Combiner With Isolation and Reflection Cancellation appears in the IEEE MTT Transactions. You must be a member of the IEEE Microwave Theory and Techniques society to get free access.
This Watkins Johnson app note describes dynamic range measurements on receivers. Part 2 discusses "comprehensive measurements," or figures of merit that combine the primary measurements, such as noise figure or IP3, to provide a picture of the range of power levels that a receiver can handle. The app note is hosted on RF Café.
This Watkins-Johnson app note describes the factors affecting the dynamic range of receivers. Part 1 focuses on "primary measurements," which include noise figure, IP2, IP3, 1dB compression, phase noise, and internal spurs. The app note is hosted on RF Café.com
Input either a dBm value or milliwatts and hit 'enter' ('tab' if using Internet Explorer) to convert from one to the other.
Input either a dB value or power ratio and hit 'enter' ('tab' if using Internet Explorer) to convert from one to the other.
Instructor Rick Lyons has written a new post on his blog at DSP Related discussing ways that you can use an FFT algorithm to compute the IFFT.
If you need to compute inverse fast Fourier transforms (inverse FFTs) but you only have forward FFT software (or forward FFT FPGA cores) available to you, below are four ways to solve your problem.