公开(公告)号：US06687238B1

公开(公告)日：2004-02-03

申请号：US09265204

申请日：1999-03-10

申请人： Anthony C. K. Soong ,  Lindsay A. Weaver, Jr. ,  Brian K. Harms ,  Thomas J. Funk ,  Larry D. Flowers ,  Bruce S. Schwartz ,  Todd A. Pressley ,  Robin Night

发明人： Anthony C. K. Soong ,  Lindsay A. Weaver, Jr. ,  Brian K. Harms ,  Thomas J. Funk ,  Larry D. Flowers ,  Bruce S. Schwartz ,  Todd A. Pressley ,  Robin Night

IPC分类号： H04B7216

CPC分类号： H04W52/246 ,  H04B1/707 ,  H04B2201/70706 ,  H04W52/34 ,  H04W52/52

摘要： The invention is a CDMA transmission control technology that includes various combinations of the following functionality: decresting, in-band to out-of-band ratio (RIO), power control, and spectral shaping. Decresting reduces peaks in the CDMA signal. RIO generates a ratio based on the signal strength of in-band versus out-of-band portions of the CDMA signal. Power control adjusts the gain of the CDMA signal based on quadrature signal calculations. Spectral shaping attenuates in-band portions of the CDMA signal adjacent to the corner frequencies. The CDMA transmission control technology can be implemented in a CDMA base station to extend range and capacity.

摘要翻译： 本发明是一种CDMA传输控制技术，其包括以下功能的各种组合：衰减，带内到带外比（RIO），功率控制和频谱整形。 降频降低了CDMA信号的峰值。 RIO基于CDMA信号的带内与带外部分的信号强度产生比率。 功率控制基于正交信号计算来调整CDMA信号的增益。 频谱整形衰减与角频率相邻的CDMA信号的带内部分。 CDMA传输控制技术可以在CDMA基站中实现，以扩展范围和容量。

公开(公告)号：US06430169B1

公开(公告)日：2002-08-06

申请号：US09265202

申请日：1999-03-10

申请人： Brian K. Harms ,  Anthony C. K. Soong ,  Thomas J. Funk ,  Larry D. Flowers

发明人： Brian K. Harms ,  Anthony C. K. Soong ,  Thomas J. Funk ,  Larry D. Flowers

IPC分类号： H04B7216

CPC分类号： H04B1/62 ,  H04B1/707

摘要： The invention is a CDMA spectral shaping technology that attenuates the out-of-band signal power in the CDMA signal. The in-band CDMA signal is attenuated near the corner frequencies to reduce components that provide a disproportionate contribution to the out-of-band signal power. The power amplifier in the CDMA base station can then operate at higher power levels without exceeding out-of-band signal power limitations. As a result, the power amplifier operates more efficiently and extends the range or capacity of the base station. In some examples of the invention, spectral shaping digital filters are placed between the cell site modem and the digital-to-analog converter in the base station. In other examples of the invention, spectral shaping analog filters are placed between the digital-to-analog converter and the low-pass filter in the base station.

摘要翻译： 本发明是对CDMA信号中的带外信号功率进行衰减的CDMA频谱整形技术。 带内CDMA信号在拐角频率附近衰减，以减少对带外信号功率提供不成比例的贡献的组件。 CDMA基站中的功率放大器然后可以在更高功率电平下工作，而不超出带外信号功率限制。 结果，功率放大器更有效地工作并且扩展了基站的范围或容量。 在本发明的一些示例中，频谱整形数字滤波器被放置在基站中的小区现场调制解调器和数模转换器之间。 在本发明的其他示例中，频谱整形模拟滤波器被放置在基站中的数模转换器和低通滤波器之间。