Channel Mapping for an Aggregated Touchless Wireless Fronthaul

Abstract

A method implemented by a wireless fronthaul unit, the method comprises aggregating a plurality of first wireless channel signals to produce a first aggregated signal via digital frequency-domain mapping (FDM), wherein the first wireless channel signals are positioned in the first aggregated signal in non-overlapping first frequency bands, each non-overlapping first frequency band having a first bandwidth and a center frequency, wherein each respective center frequency is an odd integer multiple of a lowest center frequency, converting the first aggregated signal into a first modulated signal, and transmitting the first modulated signal to a wireless fronthaul link.

What is claimed is: 
     
         1 . A wireless fronthaul device comprising:
 a receiver configured to receive an aggregated signal comprising a plurality of wireless signals, wherein the wireless signals are positioned in the aggregated signal in frequency bands, wherein each of the frequency bands has a bandwidth and a center frequency, and wherein each center frequency is an odd-integer multiple of a lowest center frequency; and   a deaggregator coupled to the receiver and configured to:
 determine a channel map, and 
 deaggregate, based on the channel map, the aggregated signal to obtain the wireless signals. 
   
     
     
         2 . The wireless fronthaul device of  claim 1 , wherein the bandwidth corresponds to a sampling rate (SR) of a wireless signal with a largest bandwidth. 
     
     
         3 . The wireless fronthaul device of  claim 2 , wherein the SR is a multiple of 30.72 megahertz (MHz). 
     
     
         4 . The wireless fronthaul device of  claim 1 , wherein the odd-integer multiple of the center frequency of a lowest first frequency band has a value of 1. 
     
     
         5 . The wireless fronthaul device of  claim 1 , wherein the deaggregator is further configured to deaggregate the aggregated signal into a plurality of baseband signals. 
     
     
         6 . The wireless fronthaul device of  claim 1 , wherein the wireless fronthaul device is a baseband unit (BBU). 
     
     
         7 . The wireless fronthaul device of  claim 6 , wherein the wireless signals comprise wireless downlink (DL) signals. 
     
     
         8 . The wireless fronthaul device of  claim 7 , wherein the wireless signals are in a baseband (BB). 
     
     
         9 . The wireless fronthaul device of  claim 1 , wherein the aggregated signal is an optical signal, a cable signal, or a free-space microwave signal. 
     
     
         10 . The wireless fronthaul device of  claim 1 , wherein the channel map maps the wireless signals to the frequency bands. 
     
     
         11 . A method comprising:
 receiving an aggregated signal comprising a plurality of wireless signals, wherein the wireless signals are positioned in the aggregated signal in frequency bands, wherein each of the frequency bands has a bandwidth and a center frequency, and wherein each center frequency is an odd-integer multiple of a lowest center frequency;   determining a channel map; and   deaggregating, based on the channel map, the aggregated signal to obtain the wireless signals.   
     
     
         12 . The method of  claim 11 , wherein the bandwidth corresponds to a sampling rate (SR) of a wireless signal with a largest bandwidth. 
     
     
         13 . The method of  claim 12 , wherein the SR is a multiple of 30.72 megahertz (MHz). 
     
     
         14 . The method of  claim 11 , wherein the odd-integer multiple of the center frequency of a lowest first frequency band has a value of 1. 
     
     
         15 . The method of  claim 11 , further comprising deaggregating the aggregated signal into a plurality of baseband signals. 
     
     
         16 . The method of  claim 11 , wherein a baseband unit (BBU) performs the method. 
     
     
         17 . The method of  claim 16 , wherein the wireless signals comprise wireless downlink (DL) signals. 
     
     
         18 . The method of  claim 17 , wherein the wireless signals are in a baseband (BB). 
     
     
         19 . The method of  claim 11 , wherein the aggregated signal is an optical signal, a cable signal, or a free-space microwave signal. 
     
     
         20 . The method of  claim 11 , wherein the channel map maps the wireless signals to the frequency bands.