Patent Application
20240048223
Many terrestrial locations require outdoor, mast-mounted antennas for capturing over the air (OTA) broadcast RF signals and delivering them to receivers at acceptable quality levels. The receivers may, for example, be TV sets, FM radios, AV receivers, or PVR/DVR units. A pre-amplifier is often helpful in boosting signals to be delivered by the antenna to downstream devices, but in situations where a single antenna, even a large one, is shared by multiple receivers, such as those used independently by residents of an apartment building, for example, providing a pre-amplifier close to the antenna, minimizing signal loss between the two, may be essential, for at least two reasons.
One reason is simply to allow the combination of that single antenna and pre-amplifier to provide signals of acceptable carrier to noise ratio (C/N) to multiple receivers at the same time, which involves a corresponding splitting of the captured signal. Another reason is to overcome signal losses during transmission to any receiver located at a significant distance from the pre-amplifier. Consider, for example, an extreme situation where a receiver is in a ground floor apartment at a diagonally opposite corner of the building from the rooftop corner location of the antenna, with one or more coax cables connecting the two locations. Signal loss and noise pickup during transmission through the long cable path may be significant.
However, supplying power through a building's conventional electrical network to reliably operate a pre-amplifier, given uncertainty and/or variability (at any particular time and as time changes) in the wired network topology through the building may itself be problematic, as the amounts of amplification needed may fluctuate unpredictably.
There is, therefore, a need for improved methods and systems for powering a pre-amplifier connected to an antenna—which may be considered as making up an amplified antenna unit—intended to capture, amplify and deliver OTA-transmitted RF signals to one or more receivers. These methods and systems would preferably not be susceptible to fluctuations either in the number of receivers concerned or in the network topology connecting receivers to the amplified antenna unit, and would be low cost, reliable, and environmentally benign.
The present invention includes methods and systems for providing strong RF signals, derived from OTA transmissions captured by an antenna mast-mounted outside a building, to one or more receivers. In most cases of practical interest, the one or more receivers are present within that building. In some cases, however, it is possible that one antenna may serve receivers in two or more buildings, spaced closely enough for cable losses to be acceptable.
In one embodiment, a system comprises: a pre-amplifier connected to: a single antenna, mounted on a mast positioned outside the building; a receiver; and a solar power unit; wherein the solar power unit is configured to deliver power to operate the pre-amplifier; and wherein the pre-amplifier is configured to amplify antenna-captured OTA-transmitted RF signals and deliver the amplified antenna-captured OTA-transmitted RF signals to the receiver at a carrier to noise ratio above an acceptable threshold, independent of location of the receiver within the building.
In another embodiment, a method comprises connecting a pre-amplifier to: a single antenna, mounted on a mast positioned outside the building; the receiver; and a solar power unit; delivering power from the solar power unit to the pre-amplifier; and operating the pre-amplifier to amplify antenna-captured OTA-transmitted RF signals and deliver the amplified antenna-captured OTA-transmitted RF signals to the receiver at a carrier to noise ratio above an acceptable threshold, independent of location of the receiver within the building.
A further understanding of the nature and the advantages of particular embodiments disclosed herein may be realized by reference to the remaining portions of the specification and the attached drawings.
Described herein are embodiments of systems and methods to process antenna-captured OTA-transmitted RF signals for delivery to one or more receivers within one or more buildings in the vicinity of the signal capturing antenna.
Different standards specify different values of acceptable C/N. The minimum C/N required for ATSC 1.0 reception is 15.1 dB. The next generation digital broadcast in the USA, ATSC 3.0 can operate at different minimum C/N level depending upon the modulation/coding that is chosen for a particular business/use case. Often the receiver will require a minimum level of sensitivity for typical users to receive a signal. For ATSC 1.0 then, a rough signal level would be 50 dBu (decibels above 1 microvolt/m), with a C/N of approximately 15 dB or better.
While the system shown in
The power generated by solar power unit 204 enables preamplifier 206 to deliver amplified versions of signals captured by 202A to each of the three receivers, 208A, 208B and 208C, at carrier to noise ratios that are above an acceptable threshold, independent of exactly where they are located within the building. Even receiver 208C, located at the greatest distance from preamplifier 206, is adequately served.
In the embodiment shown in
In some embodiments of the present invention, the solar power unit powering the preamplifier comprises a solar panel and a rechargeable battery, with the pre-amplifier being connected directly to the rechargeable battery.
The rechargeable battery, allowing the pre-amplifier to be powered regardless of time of day, cloud conditions etc., will typically be positioned close to the pre-amplifier to which it is connected, and may even be integrated with that pre-amplifier. In cases where the pre-amplifier is itself integrated with the antenna, a convenient and compact “doubly” integrated package may be formed.
Embodiments of the present invention offer advantages over prior art in this field, in enabling reliable, low-cost, high-quality reception of OTA-transmitted RF signals to one or more receivers served by a single, on-site or near-site, amplified antenna unit.
Although the description has been described with respect to particular embodiments thereof, these particular embodiments are merely illustrative, and not restrictive.
Any suitable programming language can be used to implement the routines of particular embodiments including C, C++, Java, assembly language, etc. Different programming techniques can be employed such as procedural or object oriented. The routines can execute on a single processing device or multiple processors. Although the steps, operations, or computations may be presented in a specific order, this order may be changed in different particular embodiments. In some particular embodiments, multiple steps shown as sequential in this specification can be performed at the same time.
Particular embodiments may be implemented in a computer-readable storage medium for use by or in connection with the instruction execution system, apparatus, system, or device. Particular embodiments can be implemented in the form of control logic in software or hardware or a combination of both. The control logic, when executed by one or more processors, may be operable to perform that which is described in particular embodiments.
Particular embodiments may be implemented by using a programmed general purpose digital computer, by using application specific integrated circuits, programmable logic devices, field programmable gate arrays, optical, chemical, biological, quantum or nanoengineered systems, components and mechanisms may be used. In general, the functions of particular embodiments can be achieved by any means as is known in the art. Distributed, networked systems, components, and/or circuits can be used. Communication, or transfer, of data may be wired, wireless, or by any other means.
It will also be appreciated that one or more of the elements depicted in the drawings/figures can also be implemented in a more separated or integrated manner, or even removed or rendered as inoperable in certain cases, as is useful in accordance with a particular application. It is also within the spirit and scope to implement a program or code that can be stored in a machine-readable medium to permit a computer to perform any of the methods described above.
A “processor” includes any suitable hardware and/or software system, mechanism or component that processes data, signals or other information. A processor can include a system with a general-purpose central processing unit, multiple processing units, dedicated circuitry for achieving functionality, or other systems. Processing need not be limited to a geographic location, or have temporal limitations. For example, a processor can perform its functions in “real time,” “offline,” in a “batch mode,” etc. Portions of processing can be performed at different times and at different locations, by different (or the same) processing systems. Examples of processing systems can include servers, clients, end user devices, routers, switches, networked storage, etc. A computer may be any processor in communication with a memory. The memory may be any suitable processor-readable storage medium, such as random-access memory (RAM), read-only memory (ROM), magnetic or optical disk, or other non-transitory media suitable for storing instructions for execution by the processor.
As used in the description herein and throughout the claims that follow, “a”, “an”, and “the” includes plural references unless the context clearly dictates otherwise. Also, as used in the description herein and throughout the claims that follow, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
Thus, while particular embodiments have been described herein, latitudes of modification, various changes, and substitutions are intended in the foregoing disclosures, and it will be appreciated that in some instances some features of particular embodiments will be employed without a corresponding use of other features without departing from the scope and spirit as set forth. Therefore, many modifications may be made to adapt a particular situation or material to the essential scope and spirit.
