公开(公告)号：US20180323811A1

公开(公告)日：2018-11-08

申请号：US15587548

申请日：2017-05-05

Applicant: Khalifa University of Science and Technology

Inventor： Arafat Jamil Al-Dweik ,  Husameldin Mukhtar

IPC: H03M13/45 ,  H04L1/00 ,  H03M13/29

CPC classification number: H04L1/0058 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/19 ,  H03M13/2963 ,  H03M13/453 ,  H04B1/06 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0052 ,  H04L1/0057 ,  H04L27/2035

Abstract: There is provided an ultra-light decoder for high speed digital communications based on block codes such as turbo product codes (TPCs). The new decoder can perform soft decision decoding without an algebraic hard decision decoder, which is the core of conventional soft decision decoders. The elimination of algebraic decoder significantly reduces the number of computations required per codeword, consequently, it reduces the decoding delay and processing power. However, reducing the decoding delay would immediately enable increasing the transmission speed, and minimize the need for large buffers at the receiver. Moreover, reducing the complexity and delay would enable using codes with high code rates to increase the system capacity, or use powerful codes with low code rates to reduce the transmission power. Such benefits can be achieved for about 1 dB loss in coding gain. There is also provided a receiver comprising the ultra-light decoder, as well as a decoding process.

公开(公告)号：US20180212806A1

公开(公告)日：2018-07-26

申请号：US15923835

申请日：2018-03-16

Applicant: Khalifa University of Science and Technology

Inventor： Arafat Jamil Al-Dweik ,  Youssef Iraqi ,  Mohammed Al-Mualla

IPC: H04L27/06 ,  H04L5/00 ,  H04B1/10

CPC classification number: H04L27/06 ,  H04B1/10 ,  H04L5/0048

Abstract: The present invention proposes a demodulator device, a receiver and a demodulation method for M-ary amplitude shift keying systems (MASK) that requires partial knowledge of the CSI, namely, the channel attenuation coefficient. Therefore, the new demodulator, receiver and demodulation method do not require the knowledge of the channel phase shift. Consequently, no complicated channel estimation techniques are required, and the system will be very robust to the system impairments such as phase noise, I-Q imbalance, etc. In this sense, the new technique is denoted as semi-coherent demodulation (SCD). To reduce the complexity of the new SCD, a suboptimal demodulator is derived which has much lower complexity than the optimal while providing almost the same error probability.

公开(公告)号：US09954699B2

公开(公告)日：2018-04-24

申请号：US15350948

申请日：2016-11-14

Applicant: Khalifa University of Science and Technology

Inventor： Arafat Jamil Al-Dweik ,  Youssef Iraqi ,  Mohammed Al-Mualla

IPC: H03D1/24 ,  H04L27/06 ,  H04B1/10 ,  H04L5/00

CPC classification number: H04L27/06 ,  H04B1/10 ,  H04L5/0048

Abstract: The present invention proposes a demodulator device, a receiver and a demodulation method for M-ary amplitude shift keying systems (MASK) that requires partial knowledge of the CSI, namely, the channel attenuation coefficient. Therefore, the new demodulator, receiver and demodulation method do not require the knowledge of the channel phase shift. Consequently, no complicated channel estimation techniques are required, and the system will be very robust to the system impairments such as phase noise, I-Q imbalance, etc. In this sense, the new technique is denoted as semi-coherent demodulation (SCD). To reduce the complexity of the new SCD, a suboptimal demodulator is derived which has much lower complexity than the optimal while providing almost the same error probability.

公开(公告)号：US10454615B2

公开(公告)日：2019-10-22

申请号：US15587548

申请日：2017-05-05

Applicant: Khalifa University of Science and Technology

Inventor： Arafat Jamil Al-Dweik ,  Husameldin Mukhtar

IPC: H03M13/00 ,  H04L1/00 ,  H03M13/29 ,  H03M13/45 ,  H04B1/06 ,  H04L27/20 ,  H03M13/11 ,  H03M13/15 ,  H03M13/19

Abstract: There is provided an ultra-light decoder for high speed digital communications based on block codes such as turbo product codes (TPCs). The new decoder can perform soft decision decoding without an algebraic hard decision decoder, which is the core of conventional soft decision decoders. The elimination of algebraic decoder significantly reduces the number of computations required per codeword, consequently, it reduces the decoding delay and processing power. However, reducing the decoding delay would immediately enable increasing the transmission speed, and minimize the need for large buffers at the receiver. Moreover, reducing the complexity and delay would enable using codes with high code rates to increase the system capacity, or use powerful codes with low code rates to reduce the transmission power. Such benefits can be achieved for about 1 dB loss in coding gain. There is also provided a receiver comprising the ultra-light decoder, as well as a decoding process.

公开(公告)号：US09912497B2

公开(公告)日：2018-03-06

申请号：US15363568

申请日：2016-11-29

Applicant: Khalifa University of Science and Technology

Inventor： Arafat Jamil Al-Dweik

IPC: H04L25/02 ,  H04L1/00 ,  H04L27/26

CPC classification number: H04L25/0212 ,  H04L1/0054 ,  H04L27/2647 ,  H04L27/2666

Abstract: There is provided a computer-implemented method of estimating transmitted signals in a communication system, the signals being transmitted by a transmitter to a receiver over a communication channel having a channel response, the method comprising estimating the transmitted signals based on generated trial sequences minimizing the channel response between adjacent received signals. There is also provided a receiver, a signal detector device and a communication system adapted to estimated transmitted signals in a communication system by generating trial sequences and determining the generated trial sequences minimizing the channel response between adjacent received signals. The present invention is particularly adapted for OFDM communication systems.