A method of generating a frequency division multiplexed signal at a communications device for transmission in a wireless multiple access communication system, wherein a set of M frequency tones is used for transmitting the signal, wherein the set of M frequency tones is a subset of tones in an available bandwidth, the method comprising: obtaining a set of M complex data symbols and a set of M complex training symbols for transmission using the set of M frequency tones allocated to the communications device for a dwell period comprising a plurality of successive symbol periods; mapping the M complex data symbols to first M time instants, the first M time instants corresponding to a first symbol duration of the plurality of symbol periods; generating a first set of M signal coefficients in the time domain based at least in part on the set of M complex data symbols and the first time instants by performing a summation of a product of the set of M complex data symbols and M complex sinusoids corresponding to the set of M frequency tones, wherein the first set of M signal coefficients is mapped to the set of M frequency tones for the first symbol period; mapping the M complex training symbols to second M time instants, the second M time instants corresponding to a second symbol duration of the plurality of symbol periods; generating a second set of M signal coefficients in the time domain based at least in part on the set of M complex training symbols and the second time instants by performing a summation of a product of the set of M complex training symbols and M complex sinusoids corresponding to the set of M frequency tones, wherein the second set of M signal coefficients is mapped to the set of M frequency tones for the second symbol period; and processing, for the first and second symbol period of the plurality of symbol periods of the dwell period respectively, the first set of M signal coefficients and the second set of M signal coefficients to obtain the frequency division multiplexed signal for the first and second symbol period of the plurality of symbol periods of the dwell period. obtaining a set of M complex data symbols and a set of M complex training symbols for transmission using the set of M frequency tones allocated to the communications device for a dwell period comprising a plurality of successive symbol periods; mapping the M complex data symbols to first M time instants, the first M time instants corresponding to a first symbol duration of the plurality of symbol periods; generating a first set of M signal coefficients in the time domain based at least in part on the set of M complex data symbols and the first time instants by performing a summation of a product of the set of M complex data symbols and M complex sinusoids corresponding to the set of M frequency tones, wherein the first set of M signal coefficients is mapped to the set of M frequency tones for the first symbol period; mapping the M complex training symbols to second M time instants, the second M time instants corresponding to a second symbol duration of the plurality of symbol periods; generating a second set of M signal coefficients in the time domain based at least in part on the set of M complex training symbols and the second time instants by performing a summation of a product of the set of M complex training symbols and M complex sinusoids corresponding to the set of M frequency tones, wherein the second set of M signal coefficients is mapped to the set of M frequency tones for the second symbol period; and processing, for the first and second symbol period of the plurality of symbol periods of the dwell period respectively, the first set of M signal coefficients and the second set of M signal coefficients to obtain the frequency division multiplexed signal for the first and second symbol period of the plurality of symbol periods of the dwell period.