Abstract: An apparatus and method for improving a symbol error rate of an M-ary phase shift keying (M-PSK) system having a quadrature error are provided. The apparatus includes: a conversion parameter detector that detects a conversion parameter and converts a symbol decision region using the quadrature error and at least one pair of first received symbols; and a converter & determiner converting a pair of second received symbols using the detected conversion parameter, and determining a transmission symbol according to a symbol of the converted pair of second received symbols. An increase in a symbol error rate due to the quadrature error can be prevented and the quadrature error can be easily estimated.

Abstract: An apparatus and method for I/Q modulation are provided. According to the apparatus and method, the symbol error probability performance of a conventional I/Q modulation method can be improved by a maximum of 3dB, and when the same symbol error rate (SER) as that of the conventional method is obtained, the power consumption can be reduced to half that required by the conventional method.

Abstract: An apparatus for and method of deciding symbols in a M-ary phase shift keying (MPSK) system are provided. The apparatus includes: a linear transform unit performing linear transform, to which a phase error is applied, of a received pair of symbols; and a symbol decision unit deciding a transmitted symbol corresponding to the received pair of symbols according to the sign value of the transformed symbol pair. According to the apparatus and method, degradation of a symbol error rate caused by a phase error when an MPSK signal is demodulated can be improved and a phase error can be estimated through a simple method.

Abstract: An apparatus for and method of deciding symbols in a M-ary phase shift keying (MPSK) system are provided. The apparatus includes: a linear transform unit performing linear transform, to which a phase error is applied, of a received pair of symbols; and a symbol decision unit deciding a transmitted symbol corresponding to the received pair of symbols according to the sign value of the transformed symbol pair. According to the apparatus and method, degradation of a symbol error rate caused by a phase error when an MPSK signal is demodulated can be improved and a phase error can be estimated through a simple method.

Abstract: A data traffic processing method in a subscriber network access subsystem of an advanced communications processing system is disclosed including an operation process of a data processing master module and an operation process of a data processing slave module. The operation process of the data processing master module includes the steps of: initializing hardware, displaying a system logo on a screen and initializing all parameters; initializing the data processing master module; and initializing a slave and informing a service processing board assembly (SPA) that a master execution preparation has been ended. The operation process of the data processing slave module includes the steps of: initializing the hardware and displaying the system logo on the screen; initializing the data processing slave module; and informing a master that the slave is an alive state and initializing a protocol parameter.

Abstract: The present invention has the effect that the users can automatically create a natural picture in the style of painting-like color, as if it is a photograph, by directly manufacturing a terminal of a new communication service with the spread of multi media applications and next-generation intelligence network services, and that a lot of memory is not desired in the computer graphics system having three-dimensional model to express an embossed effect by applying the style having painting-like coloring to two-dimensional model.