Dear all, I'm building an OFDM tx/rx with constant OFDM frame size. So far, no header is required. Thus, each OFDM frame is composed of 2 OFDM symbols for synchronization and N (constant) OFDM symbols for data.
I want to use Schmidl & Cox synch. I require to generate, after Schmidl & Cox detect pulse, a stream of (2+N)*M tagged complex numbers (M = OFDM symbol size) to perform channel estimation and frame equalization. As in the example rx_ofdm, I was trying to use "Header/Payload Demux". My idea was to use a block that generates a message for the Header/Payload Demux message port when a detect pulse from Schmidl & Cox is received. However, I didn't find any message generator module that can be triggered with a signal. Another solution I though of was to use a module that puts a tag in a stream when a trigger signal is received. Is my approach correct? Is there any gnuradio block I can use to solve my problem? Best regards, Oscar
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