公开(公告)号：US20050097425A1

公开(公告)日：2005-05-05

申请号：US11003437

申请日：2004-12-06

Applicant: Alexander Golitschek ,  Christian Wengerter ,  Michael Schmitt ,  Eiko Seidel

Inventor： Alexander Golitschek ,  Christian Wengerter ,  Michael Schmitt ,  Eiko Seidel

IPC: H04L1/00 ,  H04L1/18 ,  H04L5/12 ,  H04L23/02 ,  H04L27/34

CPC classification number: H04L27/34 ,  H04L1/0003 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/1867 ,  H04L1/1893 ,  H04L27/3416 ,  H04L27/3488

Abstract: A hybrid ARQ retransmission method in a communication system, wherein data packets being encoded with a forward error correction (FEC) technique prior to transmission, are retransmitted based on an automatic repeat request and subsequently soft-combined with previously received erroneous data packets either on a symbol-by-symbol or a bit-by-bit basis. The symbols of said erroneous data packets are modulated by employing a predetermined first signal constellation. The symbols of the retransmitted data packets are modulated by employing at least a predetermined second signal constellation. Each symbol bit has a mean bit reliability defined by the individual bit reliabilities over all symbols of the predetermined signal constellation. According to the invention, the predetermined first and the at least second signal constellation are selected such that the combined mean bit reliabilities for the respective bits of all transmissions are averaged out.

公开(公告)号：US20130010623A1

公开(公告)日：2013-01-10

申请号：US13570045

申请日：2012-08-08

Applicant: Alexander Golitschek

Inventor： Alexander Golitschek

IPC: H04W24/10

CPC classification number: H04W24/10 ,  H04B7/0413 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0028 ,  H04W72/0453 ,  H04W84/042 ,  H04W88/02

Abstract: The invention relates to a method for transmitting and a method for reconstructing channel quality information in a communication system. Further, the invention also provides a transmitter and receiver performing these methods, respectively. The invention suggests a scheme for communicating channel quality measures that on the one hand allows for an accurate reconstruction of the channel quality measures at the receiver and on the other hand requires an acceptable transmission overhead. This is achieved by partitioning channel quality measures into at least two partitions and to compress the values partition-wise, for example, by means of a discrete cosine transform and the transmission of only a subset of the resulting coefficients.

公开(公告)号：US07693179B2

公开(公告)日：2010-04-06

申请号：US11003437

申请日：2004-12-06

Applicant: Alexander Golitschek ,  Christian Wengerter ,  Michael Philipp Schmitt ,  Eiko Seidel

Inventor： Alexander Golitschek ,  Christian Wengerter ,  Michael Philipp Schmitt ,  Eiko Seidel

IPC: H04J3/16 ,  H04J3/22 ,  G08C25/02 ,  H04L1/18

CPC classification number: H04L27/34 ,  H04L1/0003 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/1867 ,  H04L1/1893 ,  H04L27/3416 ,  H04L27/3488

Abstract: A hybrid ARQ retransmission method involves encoding data packets with a forward error correction (FEC) technique prior to transmission. The data packets are re-transmitted based on an automatic repeat request (ARQ) and subsequently soft-combined with previously received erroneous data packets either on a symbol-by-symbol or a bit-by-bit basis. The symbols of the erroneous data packets are modulated by employing a first signal constellation. The symbols of the re-transmitted data packets are modulated by employing at least a second signal constellation. Each symbol bit has a mean bit reliability defined by the individual bit reliabilities over all symbols of the predetermined signal constellation. The first constellation and the at least second signal constellation are selected such that the combined mean bit reliabilities for the respective bits of all transmissions are averaged out.

Abstract translation: 混合ARQ重传方法包括在传输之前用前向纠错（FEC）技术对数据分组进行编码。 基于自动重复请求（ARQ）重新发送数据分组，并且随后以逐个符号或逐位的方式与先前接收到的错误数据分组进行软组合。 通过采用第一信号星座来调制错误数据分组的符号。 通过采用至少第二信号星座来调制重传数据分组的符号。 每个符号位具有由预定信号星座的所有符号上的各个比特可靠性定义的平均比特可靠性。 选择第一星座和至少第二信号星座，使得对于所有发射的各个比特的组合的平均比特可靠性被平均化。

公开(公告)号：US07583614B2

公开(公告)日：2009-09-01

申请号：US11222849

申请日：2005-09-12

Applicant: Alexander Golitschek ,  Eiko Seidel

Inventor： Alexander Golitschek ,  Eiko Seidel

IPC: G01R31/08

CPC classification number: H04L1/0034 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/1819 ,  H04L1/1867 ,  H04L1/1874 ,  H04L1/20

Abstract: The invention provides a hybrid ARQ technique for transmitting a data unit on a radio channel in a communication system to a receiver. After encoding the data unit into a sequence of code words using an encoding parameter, a first code word is transmitted, and an ACK or NAK is received from the receiver. If a NAK is received, the next code word of the sequence is transmitted. According to the invention, a measurement value indicating the current channel conditions is determined by counting the NAK messages and/or evaluating the encoding parameters. Preferably the measurement values are the overall coding rate, the average number of retransmissions per data unit, and the average number of retransmissions per code word. In the preferred embodiment, the transmitter comprises a NAK counter. Besides the improved transmission measurement, the present invention provides using this measurement for adaptation purposes.

Abstract translation: 本发明提供了一种用于在通信系统中的无线电信道上向接收机发送数据单元的混合ARQ技术。 在使用编码参数将数据单元编码成码字序列之后，发送第一码字，并从接收器接收ACK或NAK。 如果接收到NAK，则发送序列的下一个码字。 根据本发明，通过对NAK消息进行计数和/或评估编码参数来确定指示当前信道条件的测量值。 优选地，测量值是整个编码率，每个数据单元的平均重传次数和每个码字的平均重传次数。 在优选实施例中，发射机包括NAK计数器。 除了改进的传输测量之外，本发明还提供将该测量用于适应目的。

公开(公告)号：US07002923B2

公开(公告)日：2006-02-21

申请号：US10221444

申请日：2001-01-17

Applicant: Alexander Golitschek ,  Eiko Seidel

Inventor： Alexander Golitschek ,  Eiko Seidel

IPC: G01R31/08

CPC classification number: H04L1/0034 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/1819 ,  H04L1/1867 ,  H04L1/1874 ,  H04L1/20

Abstract: A hybrid ARQ technique for transmitting a data unit on a radio channel in a communication system to a receiver is provided, wherein after the encoding the data unit into a sequence of code words using an encoding parameter, a first code word is transmitted, and an ACK or NAK is received from the receiver. If a NAK is received, the next code word of the sequence is transmitted. A measurement value indicating the current channel conditions is determined by counting the NAK messages and/or evaluating the encoding parameters. The measurement values may be the overall coding rate, the average number of retransmissions per data unit, or the average number of retransmissions per code word. The transmitter may include a NAK counter. The measurement may be used for adaptation purposes.

Abstract translation: 提供了一种用于在通信系统中的无线电信道上向接收机发送数据单元的混合ARQ技术，其中在使用编码参数将数据单元编码成码字序列之后，发送第一码字，并且 从接收器接收到ACK或NAK。 如果接收到NAK，则发送序列的下一个码字。 通过对NAK消息进行计数和/或评估编码参数来确定指示当前信道条件的测量值。 测量值可以是整个编码率，每个数据单元的平均重传次数或每个码字的平均重传次数。 发射机可以包括一个NAK计数器。 测量可用于适应目的。