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1. 发明授权

US08165103B2 Method and arrangement for preamble detection 有权
标题翻译：前导码检测的方法和布置
公开(公告)号：US08165103B2
公开(公告)日：2012-04-24
申请号：US12304804
申请日：2006-06-13
申请人： Gunnar Peters , Erik Nordhamn , Georg Mesko , Björn Forsberg
发明人： Gunnar Peters , Erik Nordhamn , Georg Mesko , Björn Forsberg
IPC分类号： H04B7/216
CPC分类号： H04B1/707 , H04B1/7075 , H04B1/708 , H04B2201/7071 , H04W74/08
摘要： In a hardware accelerator for preamble detection of a Physical Random Access Channel (PRACH) in a CDMA based communication system, buffering means stores input samples received at an antenna at a first rate, addressing means read a predetermined consecutive number of the input samples in parallel at a second different rate. The hardware accelerator is further partitioned into a reusable unit providing code correlation, and a preamble detection dedicated unit providing signature code despreading. The reusable unit comprises means for correlating at least a subset of the previously read input samples with a predetermined code to provide a correlation output for a number of time lags. The preamble detection dedicated unit comprises means for preamble detection configured for providing Hadamard Transformation of the correlation output to enable preamble detection, and all means are arranged on a single hardware chip to enable high-speed data transmissions between the respective means.
摘要翻译：在用于基于CDMA的通信系统中的物理随机接入信道（PRACH）的前导码检测的硬件加速器中，缓冲装置以第一速率存储在天线处接收的输入样本，寻址装置并行地读取预定的连续数量的输入样本以第二个不同的速度。硬件加速器被进一步划分为提供代码相关性的可重用单元，以及提供签名代码解扩的前导码检测专用单元。可再利用单元包括用于将先前读取的输入样本的至少一个子集与预定代码相关联的装置，以提供多个时间滞后的相关输出。前导码检测专用单元包括用于前导码检测的装置，其被配置用于提供相关输出的Hadamard变换以使能前导码检测，并且所有装置都布置在单个硬件芯片上，以实现各个装置之间的高速数据传输。

2. 发明授权

US07751499B2 Despreading-on-demand for use in spread spectrum receivers 有权
标题翻译：用于扩频接收机的按需扩展
公开(公告)号：US07751499B2
公开(公告)日：2010-07-06
申请号：US11638701
申请日：2006-12-14
申请人： Henrik Olsson , Bjorn Forsberg , Georg Mesko , Erik Nordhamn
发明人： Henrik Olsson , Bjorn Forsberg , Georg Mesko , Erik Nordhamn
IPC分类号： H04L27/00
CPC分类号： H04B1/7103 , H04B1/7117 , H04B1/712 , H04B2201/70705
摘要： A flexible and resource-efficient despreading-on-demand (DoD) technique is described where only channels that actually contain data to be despread are despread, and only a single despreading operation need be performed using the actual spreading factor associated with that data. In one example, the data portion of the received signal is buffered for a frame so that an associated transport format, including the actual spreading factor, can be determined before the data is despread. The data is buffered in a memory at a first rate and then subsequently read out at a second rate that is considerably faster than the first rate. The fast data read-out allows despreading at a high rate so that the despread data symbols from the buffered frame are available for further processing shortly after the last sample belonging to the frame has been received.
摘要翻译：描述了灵活和资源有效的按需扩展（DoD）技术，其中仅实际包含待解扩数据的信道被解扩展，并且仅需要使用与该数据相关联的实际扩展因子来执行单个解扩操作。在一个示例中，接收信号的数据部分被缓冲用于帧，使得可以在数据解扩之前确定包括实际扩展因子的关联传输格式。数据以第一速率缓存在存储器中，然后以比第一速率快得多的第二速率读出。快速数据读出允许以高速率进行解扩，使得来自缓冲帧的解扩数据符号在已经接收到属于帧的最后一个样本之后不久可用于进一步处理。

3. 发明申请

US20070189365A1 Despreading-on-demand for use in spread spectrum receivers 有权
标题翻译：用于扩频接收机的按需扩展
公开(公告)号：US20070189365A1
公开(公告)日：2007-08-16
申请号：US11638701
申请日：2006-12-14
申请人： Henrik Olsson , Bjorn Forsberg , Georg Mesko , Erik Nordhamn
发明人： Henrik Olsson , Bjorn Forsberg , Georg Mesko , Erik Nordhamn
IPC分类号： H04B1/00
CPC分类号： H04B1/7103 , H04B1/7117 , H04B1/712 , H04B2201/70705
摘要： A flexible and resource-efficient despreading-on-demand (DoD) technique is described where only channels that actually contain data to be despread are despread, and only a single despreading operation need be performed using the actual spreading factor associated with that data. In one example, the data portion of the received signal is buffered for a frame so that an associated transport format, including the actual spreading factor, can be determined before the data is despread. The data is buffered in a memory at a first rate and then subsequently read out at a second rate that is considerably faster than the first rate. The fast data read-out allows despreading at a high rate so that the despread data symbols from the buffered frame are available for further processing shortly after the last sample belonging to the frame has been received.
摘要翻译：描述了灵活和资源有效的按需扩展（DoD）技术，其中仅实际包含待解扩数据的信道被解扩展，并且仅需要使用与该数据相关联的实际扩展因子来执行单个解扩操作。在一个示例中，接收信号的数据部分被缓冲用于帧，使得可以在数据解扩之前确定包括实际扩展因子的关联传输格式。数据以第一速率缓存在存储器中，然后以比第一速率快得多的第二速率读出。快速数据读出允许以高速率进行解扩，使得来自缓冲帧的解扩数据符号在已经接收到属于帧的最后一个样本之后不久可用于进一步处理。

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