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US 6,618,458 B1Granted
Method and apparatus for signal receiving synchronization
AssigneeNEC Corporation
InventorOsami Nishimura
Life of this patent
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AssigneeNEC Corporation
InventorOsami Nishimura
Estimating the term…
A synchronization method for received sign and its apparatus capable of increasing accuracy of detection of a receiving signal, of estimating a frequency and of improving reliability in the synchronization of received signal are provided. A signal intensity detecting section is used to detect some peak values and timing values of signals obtained in a first frame and to store them into a memory. A signal extracting section is used to estimate timing, in a second frame, by obtaining a largest synthesized peak value in both frames from the peak value and timing value supplied by a timing estimating section. In a frame following the second frame, frequency data estimated based on a frequency estimating signal with an estimated timing and frequency data estimated based on a frequency estimating signal corresponding to the estimated timing in the frame following the second frame are synthesized and an estimated frequency error is obtained from the synthesized frequency data. The correlation between a synchronization word with its frequency corrected based on an estimated frequency error by a signal extracting and frequency correcting section and a known synchronization word is examined by a synchronization word correlating section and synchronization of a receiving signal is established by a timing estimating section.
A signal receiving synchronization method for establishing synchronization between a signal sender and a signal receiver based on a frequency estimating signal detected based on a predetermined number of peak values, in each frame of a control signal containing said frequency estimating signal and a synchronization word, obtained by taking a moving average of a train of said control signals sent from said signal sender to said signal receiver and based on said synchronization word detected following said frequency estimating signal, said method comprising steps of:
A signal receiving synchronization method for establishing synchronization between a signal sender and a signal receiver based on a frequency estimating signal detected based on a predetermined number of peak values, in each frame in a control signal containing said frequency estimating signal and a synchronization word, obtained by taking a moving average of a train of said control signals sent from said signal sender to said signal receiver and based on a synchronization word detected following said frequency estimating signal, said method comprising steps of:
A signal receiving synchronization apparatus for establishing synchronization between a signal sender and a signal receiver based on a frequency estimating signal detected based on a predetermined number of peak values, in each frame in a control signal containing said frequency estimating signal and a synchronization word, obtained by taking a moving average of a train of said control signals sent from said signal sender to said signal receiver and based on said synchronization word detected following said frequency estimating signal, said apparatus comprising:
A signal receiving synchronization apparatus for establishing synchronization between a signal sender and a signal receiver based on a frequency estimating signal detected based on a predetermined number of peak values, in each frame in a control signal containing said frequency estimating signal and a synchronization word, obtained by taking a moving average of a train of said control signals sent from said signal sender to said signal receiver and based on said synchronization word detected following said frequency estimating signal, said apparatus comprising:
Dependencies are inferred from the claim text.