Multi-site mimo communications system with hybrid beamforming in l1-split architecture

Abstract

A system, a method, and a computer program product for transmission of data using a multiple input, multiple output communications system with hybrid beamforming in a layer 1 split architecture. A first portion of a signal is processed at a first portion of a physical layer located in a first portion of a base station. A frequency domain compression with statistical multiplexing is applied to the processed first portion of the signal. A compressed first portion of the signal is generated. The compressed first portion of the signal and a second portion of the signal are transmitted to a second portion of the physical layer located in a second portion of the base station.

1 . A computer-implemented method, comprising:
 processing a first portion of a signal at a base station;   applying a frequency domain compression with statistical multiplexing to the processed first portion of the signal;   generating a compressed first portion of the signal;   performing hybrid beamforming of the signal, hybrid beamforming comprising:
 digitally combining the compressed first portion of the signal and a second portion of the signal using the base station, and 
 generating, based on the digitally combined signals, one or more beamformed analog signals for transmission by one or more antennas communicatively coupled to the base station; and 
   transmitting the one or more beamformed analog signals using multiple input multiple output processing.   
     
     
         2 . The method according to  claim 1 , wherein the base station comprises at least one of a remote unit and a digital unit. 
     
     
         3 - 4 . (canceled) 
     
     
         5 . The method according to  claim 1 , wherein the multiple input multiple output processing includes at least one of the following: a single-site multiple input multiple output processing, a multiple-site multiple input multiple output processing, and a distributed multiple input multiple output processing. 
     
     
         6 - 7 . (canceled) 
     
     
         8 . The method according to  claim 1 , wherein the hybrid beamforming further comprises
 modulating the first portion of the one or more signals;   mapping the modulated first portion of the one or more signals to at least one portion of a physical layer of the base station;   pre-coding mapped modulated first portion of the one or more signals using at least one sub-band pre-coding matrix indicator, the at least one sub-band pre-coding matrix indicator is selected for each beam for transmission of the one or more signals;   assigning one or more resources to pre-coded first portion of the one or more signals;   performing digital beamforming of one or more signals digital beams corresponding to the pre-coded first portion of the one or more signals based on the assigned resources; and   performing analog beamforming of the digitized pre-coded first portion of the one or more signals to generate one or more analog signal beams for transmission by at least one antenna.   
     
     
         9 . The method according to  claim 8 , wherein the performing of the digital beamforming includes performing wideband pre-coding of the first portion of the one or more signals. 
     
     
         10 . The method according to  claim 8 , wherein the performing of the digital beamforming includes generating the one or more digital beams and combining the one or more digital beams to generate one or more combined digital beams. 
     
     
         11 . The method according to  claim 8 , wherein the at least one antenna includes one or more antenna sub-arrays, wherein each antenna sub-array generates one or more beams for transmission of the one or more signals using a beamforming matrix between one or more antenna sub-arrays. 
     
     
         12 . The method according to  claim 1 , where the base station includes at least one of the following: an eNodeB base station, a gNodeB base station, and any combination thereof. 
     
     
         13 . The method according to  claim 12 , wherein the base station includes at least one of the following: a radio transmitter and a radio receiver. 
     
     
         14 . The method according to  claim 12 , wherein the base station is a base station operating in at least one of the following communications systems: a long term evolution communications system and a new radio communications system. 
     
     
         15 . A system comprising:
 at least one programmable processor; and   a non-transitory machine-readable medium storing instructions that, when executed by the at least one programmable processor, cause the at least one programmable processor to perform operations comprising:
 processing a first portion of a signal at a base station; 
 applying a frequency domain compression with statistical multiplexing to the processed first portion of the signal; 
 generating a compressed first portion of the signal; 
 performing hybrid beamforming of the signal, hybrid beamforming comprising:
 digitally combining the compressed first portion of the signal and a second portion of the signal using the base station, and 
 generating, based on the digitally combined signals, one or more beamformed analog signals for transmission by one or more antennas communicatively coupled to the base station; and 
 
 transmitting the one or more beamformed analog signals using multiple input multiple output processing. 
   
     
     
         16 - 28 . (canceled) 
     
     
         29 . A computer program product comprising a non-transitory machine-readable medium storing instructions that, when executed by at least one programmable processor, cause the at least one programmable processor to perform operations comprising:
 processing a first portion of a signal at a base station;   applying a frequency domain compression with statistical multiplexing to the processed first portion of the signal;   generating a compressed first portion of the signal;   performing hybrid beamforming of the signal, hybrid beamforming comprising:
 digitally combining the compressed first portion of the signal and a second portion of the signal using the base station; and 
 generating, based on the digitally combined signals, one or more beamformed analog signals for transmission by one or more antennas communicatively coupled to the base station; and 
 transmitting the one or more beamformed analog signals using multiple input multiple output processing. 
   
     
     
         30 - 42 . (canceled) 
     
     
         43 . The method according to  claim 8 , wherein the modulating and the mapping are performed by a centralized unit of the base station; and
 the pre-coding, the assigning, the performing of digital beamforming, and the performing of analog beamforming are performed by a digital unit of the base station.   
     
     
         44 . The method according to  claim 8 , wherein the hybrid beamforming further comprises:
 performing Inverse Fast Fourier Transform/Cyclic Prefix, IFFT/CP, removal on the pre-coded one or more signals.   
     
     
         45 . The method according to  claim 44 , wherein the performing of Inverse Fast Fourier Transform/Cyclic Prefix, IFFT/CP, removal on the pre-coded one or more signals is performed by a digital unit of the base station. 
     
     
         46 . The system according to  claim 15 , wherein the multiple input multiple output processing includes at least one of the following: a single-site multiple input multiple output processing, a multiple-site multiple input multiple output processing, and a distributed multiple input multiple output processing. 
     
     
         47 . The system according to  claim 15 , wherein the hybrid beamforming further comprises modulating the first portion of the one or more signals;
 mapping the modulated first portion of the one or more signals to at least one portion of a physical layer of the base station;   pre-coding mapped modulated first portion of the one or more signals using at least one sub-band pre-coding matrix indicator, the at least one sub-band pre-coding matrix indicator is selected for each beam for transmission of the one or more signals;   assigning one or more resources to pre-coded first portion of the one or more signals;   performing digital beamforming of one or more signals digital beams corresponding to the pre-coded first portion of the one or more signals based on the assigned resources; and   performing analog beamforming of the digitized pre-coded first portion of the one or more signals to generate one or more analog signal beams for transmission by at least one antenna.   
     
     
         48 . The computer program product according to  claim 29 , wherein the multiple input multiple output processing includes at least one of the following: a single-site multiple input multiple output processing, a multiple-site multiple input multiple output processing, and a distributed multiple input multiple output processing. 
     
     
         49 . The computer program product according to  claim 29 , wherein the hybrid beamforming further comprises
 modulating the first portion of the one or more signals;   mapping the modulated first portion of the one or more signals to at least one portion of a physical layer of the base station;   pre-coding mapped modulated first portion of the one or more signals using at least one sub-band pre-coding matrix indicator, the at least one sub-band pre-coding matrix indicator is selected for each beam for transmission of the one or more signals;   assigning one or more resources to pre-coded first portion of the one or more signals;   performing digital beamforming of one or more signals digital beams corresponding to the pre-coded first portion of the one or more signals based on the assigned resources; and   performing analog beamforming of the digitized pre-coded first portion of the one or more signals to generate one or more analog signal beams for transmission by at least one antenna.