Data transmission and reception module, and method of adjusting reception threshold value thereof
AssigneeFujitsu Limited
InventorTetsuji Sato
Life of this patent
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Abstract
Disclosed is a method of adjusting a reception threshold value in data reception. The method comprises: generating a transmission signal on the basis of a clock regenerated from a reception signal, determining a worst phase at which a bit error rate becomes maximum by changing a phase of the transmission signal, and adjusting a reception threshold value in the state of the worst phase. The worst phase is determined by detecting the bit error rate by shifting the phase of the transmission signal by a predetermined interval while fixing the reception threshold value to a predetermined value.
Claims10
A method of adjusting a reception threshold value, comprising:
- generating a transmission signal on the basis of a clock regenerated from a reception signal;
- determining a phase of the transmission signal maximizing a bit error rate of the reception signal as a worst phase of the transmission signal;
- and
- adjusting a reception threshold value in the state of the worst phase.
An apparatus for transmitting and receiving data, comprising:
- a threshold value adjusting part for adjusting a reception threshold value and performing a bit determination of the reception signal on the basis of the adjusted reception threshold value;
- a signal monitoring part for detecting a bit error rate of the reception signal output from the threshold value adjusting part;
- a clock regenerating part for regenerating a clock by extracting clock information from the reception signal output from the threshold value adjusting part;
- a signal generating part for generating a signal on the basis of the clock regenerated by the clock generating part;
- a phase varying part for adjusting a phase of the signal generated by the signal generating part
- a transmission part for transmitting the signal adjusted by the phase varying part as a transmission signal, wherein
- a phase of the transmission signal maximizing a bit error rate of the reception signal is determined as a worst phase, and the reception threshold value of the threshold value adjusting part is adjusted by transmitting the transmission signal having the worst phase through the transmission part.
Dependencies are inferred from the claim text.