System and method for transmitting ancillary data
First Claim
Patent Images
1. A spread spectrum clock (SSC) generator comprising:
- an SSC modulator for generating a spread spectrum clock signal based on a modified SSC profile, the spread spectrum clock signal comprising a variation of a reference clock signal according to the modified SSC profile; and
an SSC profile modifier in communication with the SSC modulator, for receiving an ancillary data and modifying an SSC profile associated with the SSC modulator according to the ancillary data symbol to generate the modified SSC profile, wherein the variation of the reference clock signal of the spread spectrum clock signal is uniquely mapped to the ancillary data symbol via the modified SSC profile,wherein the SSC generator is connected to a transmitter for transmitting a message at a plurality of frequencies according to the spread spectrum clock signal, and the ancillary data symbol is encoded within a sequence of the frequencies of the plurality of frequencies used for transmitting the message.
3 Assignments
0 Petitions
Accused Products
Abstract
A method and system for encoding ancillary information at a transmitter in a high-speed communications network, the method comprising: generating an electromagnetic interference (EMI) reduction signal; receiving an ancillary data symbol; generating an EMI reduction signal variation based on the ancillary data symbol; and varying a characteristic of the EMI reduction signal based on the generated EMI reduction signal variation to encode the ancillary data symbol in the varied EMI reduction signal.
14 Citations
15 Claims
-
1. A spread spectrum clock (SSC) generator comprising:
-
an SSC modulator for generating a spread spectrum clock signal based on a modified SSC profile, the spread spectrum clock signal comprising a variation of a reference clock signal according to the modified SSC profile; and an SSC profile modifier in communication with the SSC modulator, for receiving an ancillary data and modifying an SSC profile associated with the SSC modulator according to the ancillary data symbol to generate the modified SSC profile, wherein the variation of the reference clock signal of the spread spectrum clock signal is uniquely mapped to the ancillary data symbol via the modified SSC profile, wherein the SSC generator is connected to a transmitter for transmitting a message at a plurality of frequencies according to the spread spectrum clock signal, and the ancillary data symbol is encoded within a sequence of the frequencies of the plurality of frequencies used for transmitting the message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A spread spectrum clock (SSC) detector comprising:
-
an SSC recovery circuit for obtaining a spread spectrum clock signal and comparing the spread spectrum clock signal to a reference clock signal to determine a variation between the spread spectrum clock signal and the reference clock signal, the variation defining a modified SSC profile; and an SSC profile decoder in communication with the SSC recovery circuit, for identifying the modified SSC profile corresponding to the determined variation, identifying a unique ancillary data symbol corresponding to the modified SSC profile, and outputting the ancillary data symbol, wherein the SSC recovery circuit is connected to a receiver for receiving the spread spectrum clock signal, and the receiver is connected to a deserializer for demodulating a message from the spread spectrum clock signal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
Specification