Method and system for transmitting data based on Orthogonal Frequency Division Multiplexing (OFDM)
A data transmission method and technology for a data transmission system, which are applied in the field of OFDM-based data transmission methods and systems, can solve problems such as increasing equipment costs, and achieve the effects of improving efficiency, reducing hardware implementation costs, and avoiding interference.
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[0021] In view of the shortcomings in the prior art, the present invention proposes a multi-user data transmission scheme for short- and medium-distance wireless communication, which adopts a multi-user access method similar to orthogonal frequency division multiple access OFDMA, based on OFDM and corresponding synchronization Mechanism, the available frequency band of the system is equally divided into N basic sub-bands, the bandwidth of the transmitter (STA) transceiver can be a basic sub-band or a combination of sub-bands, and the receiving site (AP) transceiver bandwidth can be N basic sub-bands, assuming that the basic sub-band is 20MHz, the receiving site (AP) transceiver bandwidth can be 20MHz, 40MHz, 80MHz, that is, for STA receivers that only support 20MHz bandwidth, it can also send and receive signals from APs with 80MHz bandwidth. In this way, based on the OFDM modulation technology, the present invention can realize that multiple STAs use different sub-band resource...
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