System and method for enhancing the performance of wideband digital RF transport systems
First Claim
1. A system for enhancing the performance of a wideband digital RF transport system, comprising:
- a plurality of bandwidth input interface devices; and
a plurality of sample rate devices coupled to said plurality of bandwidth input interface devices, each sample rate device of said plurality of sample rate devices adapted to set an input sample rate of an associated bandwidth input interface device.
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Accused Products
Abstract
A system and method for enhancing the performance of wideband digital RF transport systems is disclosed, which enables the transport of different bandwidth segments on a plurality of wideband channels by selecting an optimal clock sample rate for each bandwidth segment to be transported. Thus, the bandwidth segments are proportionally allocated so that an optimum amount of bandwidth can be transported at the serial bit rate. As one example, a system for enhancing the performance of a wideband digital RF transport system is disclosed, which includes a transmit unit, a receive unit, and an optical transmission medium connected between the transmit unit and the receive unit. The transmit unit includes a plurality of wideband RF analog signal inputs coupled to a plurality of analog-to-digital, digital down-converter (A/D DDC) devices. Notably, the sample rate of each A/D DDC device is determined by a respective sample clock. The digitized wideband RF segments at the outputs of the A/D DDC devices are combined and converted to a frame structure, converted to serial form, and transmitted on the optical transmission medium to the receive unit. A light detector device in the receive unit detects the serial bit stream on the optical transmission medium, the serialized frames are converted back to the original frame format, and the original digitized wideband RF segments are reconstructed. Each digitized wideband RF segment is coupled to a respective D/A digital up-converter (D/A DUC) device associated with a particular wideband RF signal input on the transmit side. Notably, the output sample rate of each D/A DUC device is determined by a respective sample clock, which provides the same sample rate as that of the associated A/D DDC device in the transmit unit. The sample rate of each A/D DDC device (and associated D/A DUC device) is pre-selected so that the transmission medium can transport the optimum amount of RF bandwidth at the given serial bit rate.
39 Citations
20 Claims
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1. A system for enhancing the performance of a wideband digital RF transport system, comprising:
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a plurality of bandwidth input interface devices; and
a plurality of sample rate devices coupled to said plurality of bandwidth input interface devices, each sample rate device of said plurality of sample rate devices adapted to set an input sample rate of an associated bandwidth input interface device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for enhancing the performance of a wideband digital RF transport system, comprising:
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means for inputting a plurality of bandwidths;
means for setting a plurality of input sample rates coupled to said means for inputting said plurality of bandwidths;
means for combining said plurality of bandwidths;
means for constructing at least one frame including said combined plurality of bandwidths;
means for converting said at least one frame to a serial form;
means for generating a signal including said at least one frame in serial form;
means for transporting said signal, coupled to an output of said means for generating;
means for detecting said at least one frame from said signal, coupled to said means for transporting;
means for converting said detected at least one frame to a parallel form;
means for deconstructing said at least one frame to produce said combined plurality of bandwidths;
means for separating said combined plurality of bandwidths;
means for converting said plurality of bandwidths to a second plurality of bandwidths; and
means for setting an output sample rate for each bandwidth of said second plurality of bandwidths. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for enhancing the performance of a wideband digital RF transport system, comprising the steps of:
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inputting a plurality of bandwidths; and
setting a unique input sample rate for each bandwidth of said plurality of input bandwidths;
combining said plurality of bandwidths;
converting said combined plurality of bandwidths to at least one frame structure;
converting said at least one frame structure to a serial form;
converting said at least one frame structure in serial form to a plurality of coded signals; and
transporting said plurality of coded signals on a transmission medium. - View Dependent Claims (17, 18, 19, 20)
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Specification