High Speed Multi-Mode Receiver
AssigneeInternational Business Machines Corporation
InventorsLouis Hsu, Brian Ji, James Mason, Karl Selander, Michael Sorna, Steven Zier
Life of this patent
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Abstract
A data receiver is provided which is operable to receive a signal controllably pre-distorted and transmitted by a transmitter, to generate information for adjusting the pre-distortion applied to the signal transmitted by the transmitter, and to transmit the information to the transmitter. The receiver is further operable to perform adaptive equalization to receive the signal transmitted by the transmitter.
Claims21
A data receiver operable to receive a signal controllably pre-distorted and transmitted by a transmitter, to generate information for adjusting the pre-distortion applied to the signal transmitted by the transmitter, and to transmit the information to the transmitter, the data receiver further being operable to perform adaptive equalization to receive the signal transmitted by the transmitter.
A data receiver, comprising:
- an automatic gain control unit including a variable gain amplifier and a peaking amplifier, such that in a first mode, the variable gain amplifier is operable to amplify a data-carrying signal from a transmitter to a predetermined level and the peaking amplifier is operable to amplify the signal substantially without peaking, and in a second mode, the variable gain amplifier is operable to amplify the signal with fixed gain and the peaking amplifier is operable to amplify the signal with peaking;
- a decision feedback equalizer (“DFE”), operable to determine values of transmitted data bits from the signal amplified by the automatic gain control unit, the DFE operable in the first mode to perform equalization, and operable in the second mode to perform without equalization;
- an equalization processor operable to generate first information for adaptively adjusting the equalization performed by the DFE in the first mode, and operable to generate second information for adjusting the pre-distortion applied to the data-carrying signal by the transmitter;
- and
- an up-channel transmitter operable to transmit the second information to the transmitter on a transmission channel to which the data receiver is connected for receiving the data-carrying signal from the transmitter.
A method of receiving data from a data-carrying signal transmitted by a transmitter, comprising:
- receiving values of data bits from the data-carrying signal with equalization at the receiver;
- generating first information for adjusting an amount of the equalization performed at the receiver;
- generating second information for adjusting an amount of pre-distortion applied to the data-carrying signal by the transmitter;
- and
- transmitting the second information to the transmitter.
Dependencies are inferred from the claim text.