Method and apparatus for dynamically adjusting receiver sensitivity over a phone line home network
First Claim
Patent Images
1. A transceiver, coupled to a data network implemented over a phone line, for dynamically adjusting sensitivity thereof, the transceiver comprising:
- a first analog transmitter and a second analog transmitter receiving transmitting time signals from a transmit time generator;
an analog receiver including a differential amplifier and a rectifier, the differential amplifier receiving a pair of differential waveforms from the first analog transmitter and propagates the amplified differential waveform to the rectifier that subsequently produces an envelope signal;
the analog receiver further includes a slicer receiving a comparing signal and the envelope signal and subsequently producing a noise decision signal for detecting noises in received data stream over the data network.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for dynamically adjusting receiver sensitivity over an existing phone line home network is disclosed. The method includes what is referred to Continuous Carrier Detect (CCD) adaptation process implemented by a state machine to quickly adapt to the on the fly wire DC offset in a matter of a few milliseconds for achieving optimal receiver sensitivity. According to one embodiment, a noise threshold level is dynamically generated for detecting noises in incoming data stream from the existing phone line home network.
80 Citations
22 Claims
-
1. A transceiver, coupled to a data network implemented over a phone line, for dynamically adjusting sensitivity thereof, the transceiver comprising:
-
a first analog transmitter and a second analog transmitter receiving transmitting time signals from a transmit time generator;
an analog receiver including a differential amplifier and a rectifier, the differential amplifier receiving a pair of differential waveforms from the first analog transmitter and propagates the amplified differential waveform to the rectifier that subsequently produces an envelope signal;
the analog receiver further includes a slicer receiving a comparing signal and the envelope signal and subsequently producing a noise decision signal for detecting noises in received data stream over the data network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A transceiver, coupled to a data network implemented over a phone line, for dynamically adjusting sensitivity thereof, the transceiver comprising:
-
a digital receiver to generate a comparing signal according a predefined state in a squelch control state machine;
a first analog transmitter and a second analog transmitter receiving simultaneously transmitting time signals from a transmit time generator, wherein the first analog transmitter generates a pair of differential waveforms;
a differential amplifier coupled to the first analog transmitter and receiving the pair of differential waveforms therefrom and producing an amplified differential signal;
a rectifier coupled to the differential amplifier and receiving the amplified differential signal therefrom to produce an envelope signal; and
a slicer including a comparator coupled to the rectifier and the digital receiver and receiving respectively the envelope signal and a comparing signal therefrom, the comparator producing a noise decision signal for detecting noises in received data stream over the data network. - View Dependent Claims (10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22)
-
-
16. A method for dynamically adjusting sensitivity of a transceiver coupled to a data network implemented over a phone line system, the method comprising:
-
determining a state from a state machine receiving a plurality of control signals, the state controlling how to generate a digital signal from a counter;
producing a comparing signal from the digital signal;
generating an envelope signal from a rectifier that receives an amplified differential signal, wherein the amplified differential signal is produced from a differential amplifier receiving differential waveforms; and
comparing the envelope signal with the comparing signal to produce a noise decision signal that is to be used to monitor noises in received data stream over the data network.
-
Specification