TH25839A - Methods and systems for cleaning the frequency band - Google Patents

Abstract

The cable communication system (10) will have a set of CAUs (34) that are connected to various (58-68) network devices in the tenant's address (36) network devices (58- 68) will send a signal to the CAU (34) in the negative frequency (100). Connected to a filter circuit (70), which will block the noise at Coming in from the tenant's address (36), the filter circuit (70) is then connected to the mixer (76), which converts down the signal from the negative frequency (100) to the desired frequency (104) signal. The bypass bar (102) is connected from the device. Network to a low-pass filter circuit (72). Combined with a signal that has been converted and transmitted onto the cable communication system (10).

Claims (1)

1. A system for canceling the desired frequency band for transmission in a communication system sensitive to incoming signals in the rising frequency spectrum consists of a conductor connected to the access unit. The conductor transmits information to the access unit in the canceling frequency spectrum. A filter circuit in the access unit connected to the conductor cuts off all of this, leaving only the canceling frequency spectrum and a frequency shifter connected to the filter circuit, which shifts the information from the canceling frequency spectrum to the rising frequency spectrum. 2. A system of claim 1 with a filter circuit that allows both the selected bypass band and the canceling frequency spectrum. 3. A system for canceling the desired frequency band for transmission in a cable communication system sensitive to interference in the selectable frequency spectrum consists of a filter circuit connected to the network device that transmits information in the canceling frequency spectrum. The filter circuit cuts off the damaged spectrum, unlike the canceling frequency spectrum, and a frequency shifter connected to the filter circuit shifts the information from the canceling frequency spectrum to the selectable frequency spectrum, which is suitable for transmission. 4. The system of claim 3, which includes a filter circuit that allows both the selected bypass band and the anti-bandwidth band, to pass through. 5. The method for anti-bandwidth for transmission in a cable communication system consists of steps for receiving energy in the first band and the desired band. The desired band differs from the first band and includes receiving signals in the first band, blocking energy in the desired band, and shifting the signal frequency in the first band to the desired band. 7. The system for anti-bandwidth for transmission in a cable-based communication system consists of a cable connected to the cable access unit. The cable transmits information in the anti-bandwidth spectrum. A filter circuit connected to the cable allows only the selected bypass band and the anti-bandwidth spectrum to pass through, and a low-output converter connected to the filter circuit shifts only the information from the anti-bandwidth spectrum to the rising frequency spectrum. 8. The system for anti-bandwidth for transmission in a cable communication system consists of a filter circuit connected to the network device that transmits information in the cable. The filter circuit allows the cancellation frequency spectrum and selected bypass signals to pass through and discards any damaged spectrum. A frequency shifter connected to the filter circuit shifts the information from the cancellation frequency spectrum to the desired frequency spectrum. A switch controlled by the cable communication system is placed between the filter circuit and the frequency shifter. 9. The method for reducing incoming noise in the uplink transmission of a cable-based communication system consists of the following steps: Network device transmission to the cable access unit of the cancellation frequency band; Receiving at the cable access unit of the cancellation frequency band information with uplink energy; Filtering out the uplink energy received at the cable access unit; Frequency shifting of the cancellation frequency band information to the uplink frequency band; Transmission of the uplink frequency band over the cable-based communication system. 10. The system for reducing incoming noise in the uplink transmission of a communication system consists of the network device that transmits the cancellation frequency band information. The filter circuit in the access unit receives information in the negative band. The filter circuit allows the negative band to pass through and blocks the rising band. The first transducer then converts the information in the negative band to the rising band.