Methods and apparatus for adaptively selecting a communications mode in high frequency systems

摘要

Methods and apparatus are provided for adaptively selecting a communications mode in high frequency systems. A first dual-mode device having capabilities of using two or more high frequency communications modes, such as OFDM and SC modulation, may transmit a signal to a second dual-mode device with the same capabilities. The second dual-mode device may compute a channel characteristic associated with a high frequency communications channel and select an optimal high frequency communications mode. The second dual-mode device may transmit information indicative of the channel characteristic or the selected communications mode to the first dual-mode device. The first dual-mode device may select and operate using the optimal high frequency communications mode based on the information received from the second dual-mode device. The first and second dual-mode devices may communicate using the selected high frequency communications mode.

主权项

1. A method for adaptively selecting a high-frequency communications mode of a dual-mode device, the method comprising:
receiving a signal through a first communications channel at a first dual-mode device; determining a first condition associated with a length of a high frequency communications channel at the first dual-mode device based on a second condition associated with a length of the first communications channel and a reciprocal relationship between the first communications channel and the high frequency communications channel; comparing the length of the high frequency communications channel to a threshold; and selecting between an orthogonal frequency division multiplexing (OFDM) mode and a single carrier (SC) modulation mode based on the comparing to communicate through the high frequency communications channel, wherein the OFDM mode is selected when the length of the high frequency communications channel exceeds the threshold and the SC modulation mode is selected when the length of the high frequency communications channel is below the threshold.