Frequency and power saving of the future generation wireless communications by superconducting filter

This paper proposes a model for further effective use of frequency and power of the future generation wireless communications by superconducting filter. The transmit amplifier SSPA (solid state power amplifier) has conventionally been used at its linear region by taking enough back-off in order to compress the out-band spectrum spreading. We constituted a computer simulation for the evaluation of the transmission performance of OFDM (orthogonal frequency division multiplexing) modulation in the nonlinear channel of SSPA with the sharp transmit filter of superconducting filter for 5 GHz band base station including fading. As the result of the simulation, we can save 3-5 dB of the SSPA power in the model. Moreover, the channel interval can be reduced by about 30% in frequency by the steep attenuation outside band characteristics. It is expected that the SSPA can be with small back-off and also advantageous in power consumption by using the superconducting filter.