公开(公告)号：EP2027661A4

公开(公告)日：2013-07-17

申请号：EP06748035

申请日：2006-06-13

Applicant: ERICSSON TELEFON AB L M

Inventor： PETERS GUNNAR ,  NORDHAMN ERIK ,  MESKO GEORG ,  FORSBERG BJOERN

IPC: H04J11/00 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/708 ,  H04W74/08

CPC classification number: H04B1/707 ,  H04B1/7075 ,  H04B1/708 ,  H04B2201/7071 ,  H04W74/08

公开(公告)号：EP1961135A4

公开(公告)日：2012-08-15

申请号：EP06824631

申请日：2006-12-12

Applicant: ERICSSON TELEFON AB L M

Inventor： OLSON HENRIK ,  FORSBERG BJOERN ,  MESKO GEORG ,  NORDHAMN ERIK

IPC: H04B7/26 ,  H04B1/707

CPC classification number: H04B1/7103 ,  H04B1/7117 ,  H04B1/712 ,  H04B2201/70705

Abstract: 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.

公开(公告)号：WO2007070002A3

公开(公告)日：2007-08-09

申请号：PCT/SE2006050573

申请日：2006-12-12

Applicant: ERICSSON TELEFON AB L M

Inventor： OLSON HENRIK ,  FORSBERG BJOERN ,  MESKO GEORG ,  NORDHAMN ERIK

IPC: H04B7/26 ,  H04B1/707

CPC classification number: H04B1/7103 ,  H04B1/7117 ,  H04B1/712 ,  H04B2201/70705

Abstract: 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.

Abstract translation: 描述了一种灵活的资源高效的按需解扩（DoD）技术，其中只有实际包含要解扩的数据的信道被解扩，并且仅需要使用与该数据相关联的实际扩频因子执行单个解扩操作。 在一个例子中，接收信号的数据部分被缓存一个帧，使得在解扩数据之前可以确定包括实际扩频因子的相关传输格式。 数据以第一速率缓冲在存储器中，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解扩，使得来自缓冲帧的解扩数据符号可用于在接收到属于该帧的最后一个样本之后不久进行进一步处理。

公开(公告)号：CA2653176C

公开(公告)日：2015-10-27

申请号：CA2653176

申请日：2006-06-13

Applicant: ERICSSON TELEFON AB L M

Inventor： PETERS GUNNAR ,  NORDHAMN ERIK ,  MESKO GEORG ,  FORSBERG BJOERN

IPC: H04W80/00 ,  H04B1/707

Abstract: In a hardware accelerator (1) for preamble detection of a Physical Random Access Channel (PRACH) in a CDMA based communication system, buffering means (10) stores input samples received at an antenna at a first rate, addressing means (20) read a predetermined consecutive number of the input samples in parallel at a second different rate. The hardware accelerator (1) 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 (30) 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 (40) for preamble detection configured for providing Hadamard Transformation of the correlation output to enable preamble detection, and all means (10, 20, 30, 40) are arranged on a single hardware chip to enable high-speed data transmissions between the respective means.

公开(公告)号：CA2653176A1

公开(公告)日：2007-12-21

申请号：CA2653176

申请日：2006-06-13

Applicant: ERICSSON TELEFON AB L M

Inventor： PETERS GUNNAR ,  NORDHAMN ERIK ,  FORSBERG BJOERN ,  MESKO GEORG

IPC: H04J11/00 ,  H04B1/707

Abstract: In a hardware accelerator (1) for preamble detection of a Physical Random Access Channel (PRACH) in a CDMA based communication system, buffering mean s (10) stores input samples received at an antenna at a first rate, addressi ng means (20) read a predetermined consecutive number of the input samples i n parallel at a second different rate. The hardware accelerator (1) is furth er partitioned into a reusable unit providing code correlation, and a preamb le detection dedicated unit providing signature code despreading. The reusab le unit comprises means (30) for correlating at least a subset of the previo usly read input samples with a predetermined code to provide a correlation o utput for a number of time lags. The preamble detection dedicated unit compr ises means (40) for preamble detection configured for providing Hadamard Tra nsformation of the correlation output to enable preamble detection, and all means (10, 20, 30, 40) are arranged on a single hardware chip to enable high -speed data transmissions between the respective means.