公开(公告)号：US20140169488A1

公开(公告)日：2014-06-19

申请号：US13966128

申请日：2013-08-13

Applicant: QUALCOMM Incorporated

Inventor： Nicola Varanese ,  Muhammad Awais Amin ,  Christoph A. Joetten ,  Juan Montojo

IPC: H04L27/26

CPC classification number: H04L27/2602 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2673

Abstract: A method of signal generation includes selecting a subset of contiguous OFDM symbols from a set of contiguous OFDM symbols, selecting a subset of contiguous subcarriers from a set of subcarriers, and generating a preamble that occupies the subset of contiguous subcarriers in the subset of contiguous OFDM symbols. The preamble includes portions in respective OFDM symbols of the subset of contiguous OFDM symbols. In the time domain each preamble portion corresponds to a repeating sequence of samples when subcarriers outside of the subset of contiguous subcarriers are filtered out. Generating the preamble may include flipping the sign of one or more occurrences of the repeating sequence for a final preamble portion and may include placing modulation symbols on regularly spaced subcarriers in the subset of contiguous subcarriers and phase-shifting the modulation symbols for a respective preamble portion with respect to a previous preamble portion.

Abstract translation: 一种信号产生方法包括从一组连续的OFDM符号中选择连续的OFDM符号子集，从一组子载波中选择一连续子载波的子集，并产生占用连续OFDM子集中连续子载波子集的前导码 符号。 前导码包括连续OFDM符号子集的相应OFDM符号中的部分。 在时域中，当连续副载波的子集之外的子载波被滤除时，每个前导码部分对应于样本的重复序列。 生成前导码可以包括翻转最后前导码部分的重复序列的一个或多个出现的符号，并且可以包括将调制符号放置在相邻子载波的子集中的规则间隔的子载波上，并相移相应的前同步码部分的调制符号 相对于前一个前导码部分。

公开(公告)号：US09106470B2

公开(公告)日：2015-08-11

申请号：US13946706

申请日：2013-07-19

Applicant: QUALCOMM Incorporated

Inventor： Lu Zhao ,  Stefan Brueck ,  Stephan Schlupkothen ,  Muhammad Awais Amin ,  Juan Montojo ,  Marc W. Werner ,  Hendrik Schoeneich

IPC: H03D1/24 ,  H04L27/06 ,  H04L27/34 ,  H04L1/00

CPC classification number: H04L27/06 ,  H04L1/0036 ,  H04L1/005 ,  H04L1/0057 ,  H04L27/3416

Abstract: A receiver circuit, including a multi-stage QAM de-mapper, for receiving a QAM data signal is disclosed. A first de-mapper circuit recovers a set of encoded data bits from the QAM data signal by calculating a plurality of distances between a received QAM symbol and each of a plurality of possible constellation points. A second de-mapper circuit then generates a set of unencoded data bits for the received QAM symbol based, at least in part, on the plurality of distances calculated by the first de-mapper circuit. The receiver circuit may further include a decoder circuit to decode the set of encoded data bits recovered by the first de-mapper circuit. The second de-mapper circuit may identify a subset of the plurality of possible constellation points based on a result of the decoding and select a constellation point that is associated with the shortest distance of the plurality of distances.

Abstract translation: 公开了一种用于接收QAM数据信号的包括多级QAM解映射器的接收机电路。 第一解映射器电路通过计算接收的QAM符号和多个可能的星座点中的每一个之间的多个距离，从QAM数据信号中恢复一组编码数据位。 然后，第二解映射器电路至少部分地基于由第一解映射器电路计算的多个距离来生成用于所接收的QAM符号的一组未编码数据位。 接收器电路还可以包括解码器电路，以对由第一解映射器电路恢复的编码数据位组进行解码。 第二解映射器电路可以基于解码的结果来识别多个可能的星座点的子集，并且选择与多个距离中的最短距离相关联的星座点。

公开(公告)号：US20140153672A1

公开(公告)日：2014-06-05

申请号：US13946706

申请日：2013-07-19

Applicant: QUALCOMM Incorporated

Inventor： Lu Zhao ,  Stefan Brueck ,  Stephan Schlupkothen ,  Muhammad Awais Amin ,  Juan Montojo ,  Marc W. Werner ,  Hendrik Schoeneich

IPC: H04L27/06

CPC classification number: H04L27/06 ,  H04L1/0036 ,  H04L1/005 ,  H04L1/0057 ,  H04L27/3416

Abstract: A receiver circuit, including a multi-stage QAM de-mapper, for receiving a QAM data signal is disclosed. A first de-mapper circuit recovers a set of encoded data bits from the QAM data signal by calculating a plurality of distances between a received QAM symbol and each of a plurality of possible constellation points. A second de-mapper circuit then generates a set of unencoded data bits for the received QAM symbol based, at least in part, on the plurality of distances calculated by the first de-mapper circuit. The receiver circuit may further include a decoder circuit to decode the set of encoded data bits recovered by the first de-mapper circuit. The second de-mapper circuit may identify a subset of the plurality of possible constellation points based on a result of the decoding and select a constellation point that is associated with the shortest distance of the plurality of distances.

Abstract translation: 公开了一种用于接收QAM数据信号的包括多级QAM解映射器的接收机电路。 第一解映射器电路通过计算接收的QAM符号和多个可能的星座点中的每一个之间的多个距离，从QAM数据信号中恢复一组编码数据位。 然后，第二解映射器电路至少部分地基于由第一解映射器电路计算的多个距离来生成用于所接收的QAM符号的一组未编码数据位。 接收器电路还可以包括解码器电路，以对由第一解映射器电路恢复的编码数据位组进行解码。 第二解映射器电路可以基于解码的结果来识别多个可能的星座点的子集，并且选择与多个距离中的最短距离相关联的星座点。