公开(公告)号：US20050144650A1

公开(公告)日：2005-06-30

申请号：US11058076

申请日：2005-02-14

申请人： Dan Tu ,  Louis Coffin

发明人： Dan Tu ,  Louis Coffin

IPC分类号： G06F13/00 ,  H03D3/00 ,  H03D3/02 ,  H03D3/06 ,  H04H60/31 ,  H04N5/445 ,  H04N5/50 ,  H04N7/16 ,  H04N7/173 ,  H04H9/00

CPC分类号： H03D3/007

摘要： Methods and systems for processing a single sub-channel that includes two or more combined channels. Using intermediate frequency sub-sampling, two or more channels from a broad band signal are combined into a single sub-channel for further analog and digital processing. Each of the two or more channels is down converted to an intermediate frequency, filtered to remove certain undesired channels, and combined such that the two or more channels are adjacent to each other. A digital representation of the sub-channel is produced from the combined intermediate frequency channels. Each channel within the digital representation is down converted to baseband, and the in-phase and quadrature components are separated from each other. Compared to one direct down conversion technique, intermediate frequency sub-sampling as described in the application may reduce the number of analog to digital converters and control amplifiers used in analog processing by a factor of four.

公开(公告)号：US20050289435A1

公开(公告)日：2005-12-29

申请号：US10880626

申请日：2004-06-29

申请人： Dean Mulla ,  Dan Tu

发明人： Dean Mulla ,  Dan Tu

IPC分类号： G06F13/00 ,  G06K5/04 ,  H03M13/00

CPC分类号： G06F11/10 ,  H03M13/03 ,  H04L1/0045

摘要： A method, apparatus, and system are disclosed. In one embodiment the method comprises determining whether to invert a first group of data bit signals and performing error checking and correction on the first group of data bit signals in parallel with the inversion determination.

摘要翻译： 公开了一种方法，装置和系统。 在一个实施例中，该方法包括：与反转确定并行地确定是否反转第一组数据位信号并对第一组数据位信号执行错误校验和校正。