Abstract: The present invention relates to the field of information communication and control, and discloses a method and an apparatus for adjusting transmit power and used to resolve a problem of interference between paths in a multipath system. The method provided by the present invention specifically includes: determining a path with worst signal quality according to signal quality information of each path; then, increasing transmit power of the path, or, decreasing transmit power of at least one path that produces strongest interference to the path with the worst signal quality; and finally, using a manner of cyclically adjusting signal transmit power to enable interference between the paths to meet a requirement of not affecting communications quality, thereby resolving a problem of interference between paths in a multipath system. Embodiments of the present invention are mainly used in a data transmission process in a multipath system.

Abstract: Embodiments of the present invention provide a method, includes: performing channel estimation on a signal of a current channel to obtain channel information of the current channel, performing calculation processing on the channel information obtained in current channel estimation and channel information obtained in previous channel estimation to obtain a phase difference of the current channel information, dividing the phase difference of the current channel information by a time interval between two times of channel estimation to obtain residual frequency offset information of the current channel, adding the residual frequency offset information of the current channel and frequency offset information which is of the channel and obtained in a previous calculation to obtain frequency offset information of the current channel, and outputting the frequency offset information of the current channel, so as to perform frequency offset correction on the signal of the channel according to the current frequency offse

Abstract: The present invention relates to the field of information communication and control, and discloses a method and an apparatus for adjusting transmit power and used to resolve a problem of interference between paths in a multipath system. The method provided by the present invention specifically includes: determining a path with worst signal quality according to signal quality information of each path; then, increasing transmit power of the path, or, decreasing transmit power of at least one path that produces strongest interference to the path with the worst signal quality; and finally, using a manner of cyclically adjusting signal transmit power to enable interference between the paths to meet a requirement of not affecting communications quality, thereby resolving a problem of interference between paths in a multipath system. Embodiments of the present invention are mainly used in a data transmission process in a multipath system.

Abstract: The present invention discloses a receiving apparatus, a sending apparatus, a system and a method for optical polarization division multiplexing.

Abstract: Embodiments of the present invention provide a method, includes: performing channel estimation on a signal of a current channel to obtain channel information of the current channel, performing calculation processing on the channel information obtained in current channel estimation and channel information obtained in previous channel estimation to obtain a phase difference of the current channel information, dividing the phase difference of the current channel information by a time interval between two times of channel estimation to obtain residual frequency offset information of the current channel, adding the residual frequency offset information of the current channel and frequency offset information which is of the channel and obtained in a previous calculation to obtain frequency offset information of the current channel, and outputting the frequency offset information of the current channel, so as to perform frequency offset correction on the signal of the channel according to the current frequency offse

Abstract: A method and an apparatus of adjusting transmission power are provided. Transmission power configuration information is acquired, where the transmission power configuration information includes a transmission power lower limit and a transmission power upper limit; modulation mode configuration information is acquired, where the modulation mode configuration information includes a lower limit modulation mode and an upper limit modulation mode; current channel information is acquired; calculation is performed according to the current channel information, the transmission power configuration information and the modulation mode configuration information to obtain first transmission power and a first modulation mode; and signal transmission is controlled according to the first transmission power and the first modulation mode.

Abstract: The embodiments of the present invention disclose a system, a method, and a device for polarization multiplexing. The method includes: co-direction judgment: after judging that the similarity between the control quantities of the two optical signals meets a predetermined similarity criterion, enabling at least one of the two branches to re-search for the control quantity until the similarity between the control quantities of the two optical signals does not meet the predetermined similarity criterion. The preceding technical solution may substantially prevent the optical signals output by the two branches at a receiving end from having the co-directional state of polarization, without affecting the complexity and implementation cost of the system and the processing time delay of data signals at the receiving end.

Abstract: The present invention discloses a receiving apparatus, a sending apparatus, a system and a method for optical polarization division multiplexing.