Aggregated touchless wireless fronthaul
First Claim
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1. An apparatus comprising:
- a receiver configured to;
receive over a single optical fiber link an optical signal carrying an aggregated signal comprising a plurality of wireless channel signals; and
convert the optical signal into an analog electric signal, the plurality of wireless channel signals being positioned in different non-overlapping frequency bands and spanning respective channel bandwidths (BWs), a first channel BW of the respective channel BWs being different from a second channel BW of the respective channel BWs;
an analog-to-digital converter (ADC) coupled to the receiver and configured to convert the analog electric signal into a digital signal; and
a digital signal processor (DSP) coupled to the ADC and configured to extract the plurality of wireless channel signals from the digital signal, the extracted plurality of wireless channel signals having the respective channel BWs.
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Abstract
A method and apparatus are provided for wireless channel signals processing. An optical signal carrying an aggregated signal comprising a plurality of wireless channel signals is received over a single optical fiber link and converted into a digital signal and then processed to produce the plurality of wireless channel signals. The plurality of wireless channel signals in the aggregated signal are positioned in different non-overlapping frequency bands that span respective channel bandwidths (BWs), where a first channel BW of the respective channel BWs is different from a second channel BW of the respective channel BW.
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Citations
19 Claims
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1. An apparatus comprising:
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a receiver configured to; receive over a single optical fiber link an optical signal carrying an aggregated signal comprising a plurality of wireless channel signals; and convert the optical signal into an analog electric signal, the plurality of wireless channel signals being positioned in different non-overlapping frequency bands and spanning respective channel bandwidths (BWs), a first channel BW of the respective channel BWs being different from a second channel BW of the respective channel BWs; an analog-to-digital converter (ADC) coupled to the receiver and configured to convert the analog electric signal into a digital signal; and a digital signal processor (DSP) coupled to the ADC and configured to extract the plurality of wireless channel signals from the digital signal, the extracted plurality of wireless channel signals having the respective channel BWs. - View Dependent Claims (2, 3, 4, 5, 14, 15)
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6. A method for wireless channel signals processing, comprising:
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receiving over a single optical fiber link an optical signal carrying an aggregated signal comprising a plurality of wireless channel signals; converting the optical signal into an analog electric signal, the plurality of wireless channel signals being positioned in different non-overlapping frequency bands and spanning respective channel bandwidths (BWs), a first channel BW of the respective channel BWs being different from a second channel BW of the respective channel BWs; converting the analog electric signal into a digital signal; and extracting the plurality of wireless channel signals from the digital signal, the exacted plurality of wireless channel signals having the respective channel BWs. - View Dependent Claims (7, 8, 9, 10, 16, 17)
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11. An apparatus comprising:
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a baseband digital signal processor (DSP) that generates a plurality of wireless channel signals; a digital to analog converter (DAC); and a digital channel aggregation processor that is coupled between the baseband DSP and the DAC and configured to; receive the plurality of wireless channel signals of the different wireless channels, the plurality of wireless channel signals comprising respective channel bandwidths (BWs), a first channel BW of the respective channel BWs being different from a second channel BW of the respective channel BWs; perform a channel aggregation in a digital domain on the plurality of wireless channel signals to produce an aggregated signal in which the plurality of wireless channel signals are positioned in different non-overlapping frequency bands of the aggregated signal, wherein the aggregated signal comprises a first channel signal and a second channel signal, the first channel signal being positioned in a first frequency band of the different non-overlapping frequency bands and having the first channel BW, and the second channel signal being positioned in a second frequency band of the different non-overlapping frequency bands and having the second channel BW, wherein the digital channel aggregation processor comprises multiple fast Fourier transformers (FFTs) for respective wireless channels and a single inverse fast Fourier transformer (IFFT), wherein the digital channel aggregation processor is further configured to process samples output by the single IFFT such that for every M samples output by the single IFFT, a center M-L samples are kept, where L is an overlap length, M is a size of the single IFFT. - View Dependent Claims (12, 13, 18, 19)
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Specification