Data transmission method, apparatus and antenna array
Disclosed in the present invention are a data transmission method, an apparatus and an antenna array, in order to realize wide bandwidth data transmission of massive antenna array. The data transmission method comprises: baseband IQ data of multiple CA is grouped via IR data interface module to obtain baseband IQ data of each CA group; for baseband IQ data of each CA group: the baseband IQ data with enhanced data rate of the CA group is up-converted to digital intermediate frequency band by a digital up-conversion module; the digital intermediate frequency signals of the CA group are superposed by a combiner to form a multi-carrier digital intermediate frequency signal; in accordance with the amplitude and phase requirements of each antenna in a group of antenna sharing the multi-carrier digital intermediate frequency signal, the amplitude and phase of the multi-carrier digital intermediate frequency signal are respectively adjusted and transmitted to a digital to analog converter of a corresponding antenna channel; a multi-carrier analog intermediate frequency signal is generated by the digital to analog converter of each antenna channel, and then is transmitted to the corresponding antenna channel.
1. A method for transmitting data, the method comprising:
dividing, by an interface radio frequency (IR) data interface module, baseband in-phase and quadrature (IQ) data of multiple carrier antennas (CAs) into groups to obtain baseband IQ data of each group of CAs; and
for the baseband IQ data of each group of CAs: increasing, by an interpolation and filter module, a data rate of the baseband IQ data of the group of CAs; up-converting, by a digital up-conversion module, the baseband IQ data of the group of CAs having the increased data rate into a digital intermediate-frequency band to obtain digital intermediate-frequency signals of the group of CAs; adding, by a combiner, the digital intermediate-frequency signals of the group of CAs together to form a multi-carrier digital intermediate-frequency signal; adjusting, by an amplitude and phase adjustment module, an amplitude and a phase of the multi-carrier digital intermediate-frequency signal as required by each antenna in a group of antennas sharing the multi-carrier digital intermediate-frequency signal, respectively, and then transmitting the adjusted multi-carrier digital intermediate-frequency signals to digital to analog converters of corresponding antenna channels; and generating, by the digital to analog converters of the corresponding antenna channels, multi-carrier analog intermediate-frequency signals, and transmitting the multi-carrier analog intermediate-frequency signals to the corresponding antenna channels.
2. The method according to claim 1 , wherein a quantity of antennas in the group of antennas is an exponent of 2.
3. The method according to claim 1 , wherein the amplitudes and the phases required by the antennas are obtained from a baseband unit (BBU).
4. A method for receiving data, the method comprising:
for a multi-carrier analog intermediate-frequency signal received by each antenna channel in a group of antenna channels and shared by the group of antenna channels:
converting, by an analog to digital converter, the multi-carrier analog intermediate-frequency signal into a multi-carrier digital intermediate-frequency signal, adjusting an amplitude and a phase of the multi-carrier digital intermediate-frequency signal, and then transmitting the adjusted multi-carrier digital intermediate-frequency signal to a combiner corresponding to the group of antenna channels;
adding, by the combiner corresponding to the group of antenna channels, the adjusted multi-carrier digital intermediate-frequency signals corresponding to all the antenna channels in the group of antenna channels together to obtain a digital intermediate-frequency signal of a group of carrier antennas (CAs); down-converting, by a digital down-conversion module, the digital intermediate-frequency signal of the group of CAs into baseband in-phase and quadrature (IQ) data of the group of CAs, and transmitting the baseband IQ data of the group of CAs to a filter and decimation module; and processing, by the filter and decimation module, the baseband IQ data of the group of CAs to obtain baseband IQ data of each CA, and transmitting the baseband IQ data of each CA to an IR data interface module; and
processing, by the IR data interface module, the baseband IQ data of each CA to obtain baseband IQ data of each CA, and transmitting the baseband IQ data of each CA to a baseband unit (BBU).
5. The method according to claim 4 , wherein a quantity of antennas in the group of antennas is an exponent of 2.
6. An antenna array, the antenna array comprising dually polarized antennas arranged in M rows by P columns, and antenna channels corresponding to the respective antennas, wherein both M and P are exponents of 2; and the antenna array further comprises an apparatus for transmitting data an apparatus for receiving data; wherein
the apparatus for transmitting data comprises a transmitter, a processor, and a memory storing at least one instruction, wherein the processor is configured to execute the at least one instruction to:
process baseband in-phase and quadrature (IQ) data of multiple carrier antennas (CAs) to generate baseband IQ data of each groups of CAs;
increase a data rate of the baseband IQ data of each group of CAs;
up-convert the baseband IQ data of each group of CAs to a digital intermediate-frequency band;
add digital intermediate-frequency signals of each group of CAs together to form a multi-carrier digital intermediate-frequency signal;
adjust an amplitude and a phase of the multi-carrier digital intermediate-frequency signal as required by each antenna in a group of antennas sharing the multi-carrier digital intermediate-frequency signal;
convert each adjusted multi-carrier digital intermediate-frequency signal into a CA analog intermediate-frequency signal;
control the transmitter to transmit the CA analog intermediate-frequency signals to the corresponding antenna channels; and
the apparatus for receiving data comprises a transmitter, a processor, and a memory storing at least one instruction, wherein the processor is configured to execute the at least one instruction to:
for a multi-carrier analog intermediate-frequency signal received by each antenna channel in a group of antenna channels and shared by the group of antenna channels: convert the multi-carrier analog intermediate-frequency signal into a multi-carrier digital intermediate-frequency signal; adjust an amplitude and a phase of the multi-carrier digital intermediate-frequency signal, add the adjusted multi-carrier digital intermediate-frequency signals corresponding to all the antenna channels in the group of antenna channels together to obtain a digital intermediate-frequency signal of a group of CAs; down-convert the digital intermediate-frequency signal of the group of CAs to obtain baseband IQ data of the group of CAs; and process the baseband IQ data of the group of CAs to obtain baseband IQ data of each CA; and
process the baseband IQ data of each CA into baseband IQ data of each CA; and control the transmitter to transmit the baseband IQ data of each CA to a BBU.