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US 2004/0165672 A1Published application
Upstream communication system with controllable band pass filter properties
OwnerArnold Karel Jansen Van Doorninventor
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OwnerArnold Karel Jansen Van Doorninventor
Estimating the term…
A communication system (1) is described in a possible embodiment comprising a main transmitter (TR) having two or more series arrangements of at least a digital signal processor (6) and a down sampler (7) coupled to the band pass filter (6), and having a multiplexer (MUX) coupled to each of the series arrangements and to a communication channel (CHUS, CHDS), and a main receiver (RC) having two ore more further series arrangements of at least an up sampler (9) and a further digital signal processor (10) coupled to the up sampler (9), and having a demultiplexer (DEMUX) coupled to the communication channel (CHUS, CHDS) and to each of the further series arrangements. Such a system is used for upstream transmission in a Hybrid Fiber Coax (HFC) network within specified frequency bands. The described system (1) provides extended flexibility to allow error reduced upstream transmission at an increased data rate. Control means (8, 11) provide adjustment of the digital signal processor parameters after installation of the system (1).
A receiver (2) for application in a communication system (1), which comprises a transmitter (3′) and the receiver (2) coupled to the transmitter (3′) through a communication channel (CHUS, CHDS), the receiver (2) includes:
A transmitter (3′) for application in a communication system (1) comprising a receiver (2) and the transmitter (3′) coupled to the receiver (2) through a communication channel (CHUS, CHDS), characterised in that the transmitter (3′) includes a second digital signal processor (6), a down sampler (7) coupled to the second digital signal processor (6) for retaining only a part of samples of a data input signal, and second filter control means (8) coupled to the second digital signal processor (6) for controlling the digital signal processing therein such that a non aliased portion of the data signal can be reconstructed by the receiver (2).
Programmable control means (8, 11) for application in the communication system (1) according to one of the claims 7-11.
Dependencies are inferred from the claim text.