OFDM WLAN Overview
Orthogonal frequency division multiplexing (OFDM) is a promising technique for achieving high data rate and combating multipath fading in wireless communications. OFDM can be thought of as a hybrid of multi-carrier modulation (MCM) and frequency shift keying (FSK) modulation. MCM is the principle of transmitting data by dividing the stream into several parallel bit streams and modulating each of these data streams onto individual carriers or subcarriers; FSK modulation is a technique whereby data is transmitted on one carrier from a set of orthogonal carriers in each symbol duration. Orthogonality amongst the carriers is achieved by separating the carriers by an integer multiples of the inverse of symbol duration of the parallel ...
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