Successive tones have a tone frequency spacing, Δfta, and a sampling frequency, fs, is chosen so that fs = NΔfta/S. S is a spacing given by S = Mw with w being an integer.
The clock signal can be re -used for new generation of same frequency spacing subcarriers (and phase-locked) to the original signal.
A match inverter (28) produces an estimate of the speech data vector in frequency space by a pseudo-inverse transformation.
The first OFDM symbols utilize a first tone spacing, and include a first number of non-zero tones collectively spanning a first bandwidth.
A transceiver system according to the present invention transmits data utilizing multiple frequency-separated channels.
In some embodiments, one baseband PAM transmitter is combined with one frequency separated QAM transmitter.
In some embodiments, the baseband and one or more frequency separated transmission bands can be utilized.
The second OFDM symbols utilize the first tone spacing, and include a second number of non-zero tones collectively spanning a second bandwidth less than the first bandwidth.
Any combination of modulation systems can be utilized (e.g. PAM for the baseband and QAM for the frequency separated bands).
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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