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UWB SYSTEM EMPLOYING GAUSSIAN MINIMUM SHIFT KEY MODULATION, COMMON MODE SIGNALING, AND BEAMFORMING
UWB SYSTEM EMPLOYING GAUSSIAN MINIMUM SHIFT KEY MODULATION, COMMON MODE SIGNALING, AND BEAMFORMING
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机译:UWB系统采用高斯最小移位键调制,共模信号发送和波束成形
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摘要
A multi-mode transmission system supporting OFDM and single-carrier signals is configured to perform interpolation and decimation such that the ratio of the interpolation factor to the decimation factor equals the ratio between the OFDM sampling rate and the single-carrier chip rate. A constant-envelope modulator comprises a π/4 fixed rotator, a π/2 continuous rotator, and in-phase and quadrature-phase analog Bessel filters. Frame formats and signaling protocols are provided for signal acquisition, synchronization, and tracking between wireless devices that employ different antenna configurations. Spreading gains are selected to compensate for different antenna gains such that the total gain (antenna gain plus spreading gain) is substantially equal for transmissions employing different beam patterns.
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