Method and apparatus for generating a programmable synchronization signal for a data communication system
AssigneeConexant Systems, Inc.
InventorSverrir Olafsson
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Abstract
A modem system includes a programmable synchronization signal format that can be configured at a first modem in response to a request received from a second modem. The synchronization signal format may define a number of parameters of the synchronization signal, such as the sign pattern for symbols transmitted by the first modem during a training sequence. The specific parameters of the synchronization signal format may be associated with the design and operation of the second modem. For example, the particular timing recovery and automatic gain control schemes used by the receiver portion of the second modem may be optimally initialized with a synchronization signal having a specific length, amplitude, or spectrum.
Claims44
A synchronization method for use in a data communication system having a first device configured to transmit data at a symbol rate to a second device, said method comprising the steps of:
- defining a synchronization signal descriptor at said second device associated with a receiver of said second device;
- sending information indicative of said synchronization signal descriptor from said second device to said first device;
- receiving said information at said first device;
- and
- generating at said first device a synchronization signal for transmission from said first device to said receiver, said synchronization signal being configured in accordance with said synchronization signal descriptor.
A synchronization system for use in a data communication system having a first device configured to transmit data at a symbol rate, and a second device configured to receive data transmitted from said first device, said synchronization system comprising:
- means for storing a synchronization signal descriptor having a synchronization format associated with a receiver of said second device, said means for storing being located at said second device;
- means for sending information indicative of said synchronization signal descriptor from said second device to said first device;
- means for receiving said information at said first device;
- means for generating a synchronization signal at said first device, said synchronization signal being configured in accordance with said synchronization signal descriptor;
- and
- means for transmitting said synchronization signal from said first device to said second device.
In a data communication system having a first device configured to transmit data at a symbol rate to a second device, a method for providing a synchronization signal to said second device, said method comprising the steps of:
- receiving, at said first device, information indicative of a synchronization signal descriptor having a synchronization format;
- generating at said first device a synchronization signal in accordance with said information;
- and
- transmitting said synchronization signal from said first device to said second device.
A receiver unit for use in a data communication system having a corresponding transmitter unit, said receiver unit comprising:
- means for storing information associated with at least one synchronization signal format compatible with said receiver unit;
- a transmitter for transmitting to said transmitter unit said information in response to a synchronization request from said transmitter unit received by said receiver unit;
- and
- a detection circuit for detecting a synchronization signal sent from the transmitter unit, said synchronization signal utilized by said receiver unit and being configured in accordance with said information.
A transmitter unit for use in a data communication system having a corresponding receiver unit, said transmitter unit comprising:
- a receiver for receiving information sent from the receiver unit, said information associated with a synchronization signal format compatible with said receiver unit;
- means for processing said information to retrieve said synchronization signal format;
- means for configuring data symbols in accordance with said synchronization signal format to thereby produce synchronization-conveying data symbols;
- and
- a transmitter for transmitting said synchronization-conveying data symbols to said receiver unit.
Dependencies are inferred from the claim text.