Abstract: A Doppler frequency estimation system includes a basis projector, a polynomial generator and an extreme value determinator. The basis projector receives and projects multiple channel sampling signals to a set of orthogonal bases to thereby generate multiple channel correlation vectors. The polynomial generator is connected to the basis projector in order to produce a target polynomial based on the channel correlation vectors, an estimated channel-envelope-to-noise-plus-interference power-ratio and a channel-envelope power. The extreme value determinator is connected to the polynomial generator in order to determine an extreme value of the polynomial and output a frequency corresponding to the extreme value as an estimated Doppler frequency.

Abstract: A Doppler frequency estimation system includes a basis projector, a polynomial generator and an extreme value determinator. The basis projector receives and projects multiple channel sampling signals to a set of orthogonal bases to thereby generate multiple channel correlation vectors. The polynomial generator is connected to the basis projector in order to produce a target polynomial based on the channel correlation vectors, an estimated channel-envelope-to-noise-plus-interference power-ratio and a channel-envelope power. The extreme value determinator is connected to the polynomial generator in order to determine an extreme value of the polynomial and output a frequency corresponding to the extreme value as an estimated Doppler frequency.

Abstract: A system and method for transmission diversity status detection is disclosed, which receives a synchronization channel (SCH) signal and a common pilot channel (CPICH) signal from a base station for detecting whether the base station uses the transmission diversity technique. The transmission diversity status detector detects the transmission diversity status of the base station by detecting the modulation of SCH symbols coherently. The phase references for coherent detection of SCH symbols are extracted from the despreaded CPICH signal. To detect the odd-numbered SCH symbols coherently, the detector applies all phase references of different antennas on odd-numbered SCH symbols and performs selection in the final decision flow. The detector also contains the Time Switched Transmit Diversity (TSTD) filters, designed based on a dependency between the modulation of SCH symbols and the transmit antenna of SCH signals, to improve the signal-to-noise ratio of SCH symbols.

Abstract: A system and method for transmission diversity status detection is disclosed, which receives a synchronization channel (SCH) signal and a common pilot channel (CPICH) signal from a base station for detecting whether the base station uses the transmission diversity technique. The transmission diversity status detector detects the transmission diversity status of the base station by detecting the modulation of SCH symbols coherently. The phase references for coherent detection of SCH symbols are extracted from the despreaded CPICH signal. To detect the odd-numbered SCH symbols coherently, the detector applies all phase references of different antennas on odd-numbered SCH symbols and performs selection in the final decision flow. The detector also contains the Time Switched Transmit Diversity (TSTD) filters, designed based on a dependency between the modulation of SCH symbols and the transmit antenna of SCH signals, to improve the signal-to-noise ratio of SCH symbols.