A frequency channel that occupies only a portion of RF bandwidth allocated to the carrier and, therefore, has a smaller information capacity. The more the bandwidth available for the overall LTE carrier, the more the number of subcarriers used.To save bandwidth, the subcarriers are spaced in such a way that the side lobes of each subcarrier wave are exactly zero at the center of the neighboring subcarrier. This property is referred to as 'orthogonality'.