System and method for tone mapping during single-user and multi-user modes of operation, including transmission of OFDM symbols and OFDMA symbols in a WLAN, respectively

摘要

System including DC tone, guard tone, data tone assignment, mapping, and inverse Fourier transform (IFT) module. The DC tone module determines the number of DC tones based on whether the network device is operating in a single user or multi-user mode. The guard tone module determines the number of guard tones based on whether the network device is operating in a single user or multi-user mode. The data tone assignment module determines the number of data tones based on the number of DC tones and guard tones. The mapping module receives the data and maps the data to data tones based on the number of data tones. The IFT module performs frequency / time domain transformation of the output of the mapping module to generate orthogonal frequency division multiplexing (OFDM) symbols during single user mode and OFDM access symbols during multiuser mode.