Disclosed are a signal transmission method and a base station, the method: generating a PCRS used in order to remove phase noise from a downlink signal; mapping the PCRS at predetermined intervals on a region, in which a data channel is mapped, in a downlink resource region; and transmitting the PCRS to a terminal.

Disclosed are a signal transmission method and a base station, the method: generating a PCRS used in order to remove phase noise from a downlink signal; mapping the PCRS at predetermined intervals on a region, in which a data channel is mapped, in a downlink resource region; and transmitting the PCRS to a terminal.

Aspects of the subject disclosure may include, for example, a method, includes coordinating relay transmission of a modulated signal via relay links of a distributed antenna system to reduce an accumulated forwarding delay in forwarding the modulated signal through the relay links. One of the relay links of the distributed antenna system reconverts the spectral segment of the modulated signal for transmission to a communication device to which the modulated signal is directed.

Aspects of the subject disclosure may include, for example, a method, includes coordinating relay transmission of a modulated signal via relay links of a distributed antenna system to reduce an accumulated forwarding delay in forwarding the modulated signal through the relay links. One of the relay links of the distributed antenna system reconverts the spectral segment of the modulated signal for transmission to a communication device to which the modulated signal is directed.

A method of receiving information is provided. The method, performed at a system for information transfer, includes receiving a first signal pulse and determining a first frequency band associated with the first signal pulse. The method includes, in accordance with a determination that the first frequency band is a respective frequency band in a first set of frequency bands, determining, from a predefined set of symbols associated with the first set of frequency bands, a first symbol associated with the first frequency band and represented by the first signal pulse. The first set of frequency bands includes a second frequency band that is a nearest frequency band in the first set of frequency bands to the first frequency band. The first frequency band has a first center frequency; the second frequency band has a second center frequency; and a difference between the first center frequency and the second center frequency exceeds a frequency difference threshold.

A method of receiving information is provided. The method, performed at a system for information transfer, includes receiving a first signal pulse and determining a first frequency band associated with the first signal pulse. The method includes, in accordance with a determination that the first frequency band is a respective frequency band in a first set of frequency bands, determining, from a predefined set of symbols associated with the first set of frequency bands, a first symbol associated with the first frequency band and represented by the first signal pulse. The first set of frequency bands includes a second frequency band that is a nearest frequency band in the first set of frequency bands to the first frequency band. The first frequency band has a first center frequency; the second frequency band has a second center frequency; and a difference between the first center frequency and the second center frequency exceeds a frequency difference threshold.

A method of transmitting information is provided. The method is performed at a system for information transfer. The method includes obtaining a first symbol, in a predefined set of symbols, for transmission; determining a first frequency band, in a first set of frequency bands associated with the predefined set of symbols, that is associated with the first symbol; and transmitting a first signal pulse having a first frequency in the first frequency band. The method includes, after transmitting the first signal pulse, transmitting a control signal associating a second set of frequency bands with the predefined set of symbols. The second set of frequency bands is distinct from the first set of frequency bands. The method includes, after transmitting the control signal, obtaining a second symbol, in the predefined set of symbols, for transmission; determining a second frequency band, in the second set of frequency bands, associated with the second symbol; and transmitting a second signal pulse having a frequency in the second frequency band.

A method of transmitting information is provided. The method is performed at a system for information transfer. The method includes obtaining a first symbol, in a predefined set of symbols, for transmission; determining a first frequency band, in a first set of frequency bands associated with the predefined set of symbols, that is associated with the first symbol; and transmitting a first signal pulse having a first frequency in the first frequency band. The method includes, after transmitting the first signal pulse, transmitting a control signal associating a second set of frequency bands with the predefined set of symbols. The second set of frequency bands is distinct from the first set of frequency bands. The method includes, after transmitting the control signal, obtaining a second symbol, in the predefined set of symbols, for transmission; determining a second frequency band, in the second set of frequency bands, associated with the second symbol; and transmitting a second signal pulse having a frequency in the second frequency band.

Techniques are provided for providing Doppler correction. In particular, embodiments may provide re-banding circuitry having a reference clock, a mixer, and a compensation circuitry for re-banding and for Doppler correction. The compensation circuitry may be configured to adjust a reference frequency of the reference clock based on signals received from a Global Navigation Satellite System (GNSS) receiver. The mixer may be configured to translate communication signals in a first frequency band to a second frequency band based at least in part on the adjusted reference frequency of the reference clock.

Techniques are provided for providing Doppler correction. In particular, embodiments may provide re-banding circuitry having a reference clock, a mixer, and a compensation circuitry for re-banding and for Doppler correction. The compensation circuitry may be configured to adjust a reference frequency of the reference clock based on signals received from a Global Navigation Satellite System (GNSS) receiver. The mixer may be configured to translate communication signals in a first frequency band to a second frequency band based at least in part on the adjusted reference frequency of the reference clock.