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Deve
Deve
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I'm trying to implement an sound card-based OFDM modem. A paper says:

...A serial to parallel converter is applied and the IFFT operation is performed on the parallel complex data.

Say I have a stream S$S$ of complex numbers, then after Sserial-to-parallel (S/P) conversion, it becomes S1$S_1$ and S2$S_2$. But as far as I'm concerned, OFDM requires the sub-carriers to be orthogonal to each other. So can I just perform IFFT twice directly on the streams without defining the frequencies of sub-carriers? I'm quite puzzled. Any help on this will be greatly appreciated. Thanks.

I'm trying to implement an sound card-based OFDM modem. A paper says:

...A serial to parallel converter is applied and the IFFT operation is performed on the parallel complex data.

Say I have a stream S of complex numbers, then after S/P conversion, it becomes S1 and S2. But as far as I'm concerned, OFDM requires the sub-carriers to be orthogonal to each other. So can I just perform IFFT twice directly on the streams without defining the frequencies of sub-carriers? I'm quite puzzled. Any help on this will be greatly appreciated. Thanks.

I'm trying to implement an sound card-based OFDM modem. A paper says:

...A serial to parallel converter is applied and the IFFT operation is performed on the parallel complex data.

Say I have a stream $S$ of complex numbers, then after serial-to-parallel (S/P) conversion, it becomes $S_1$ and $S_2$. But as far as I'm concerned, OFDM requires the sub-carriers to be orthogonal to each other. So can I just perform IFFT twice directly on the streams without defining the frequencies of sub-carriers? I'm quite puzzled. Any help on this will be greatly appreciated. Thanks.

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babel92
babel92
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Software-based sound card OFDM

I'm trying to implement an sound card-based OFDM modem. A paper says:

...A serial to parallel converter is applied and the IFFT operation is performed on the parallel complex data.

Say I have a stream S of complex numbers, then after S/P conversion, it becomes S1 and S2. But as far as I'm concerned, OFDM requires the sub-carriers to be orthogonal to each other. So can I just perform IFFT twice directly on the streams without defining the frequencies of sub-carriers? I'm quite puzzled. Any help on this will be greatly appreciated. Thanks.