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Patent Agency Ranking
公开(公告)号：US20180248577A1
公开(公告)日：2018-08-30
申请号：US15755255
申请日：2016-10-12
Applicant: Rambus Inc.
Inventor： Masum HOSSAIN , Nhat NGUYEN , Yikui Jen DONG , Arash ZARGARAN-YAZD , Wendemagegnehu BEYENE
Abstract: Decision feedback equalization (DFE) is used to help reduce inter-symbol interference (ISI) from a data signal received via a band-limited (or otherwise non-ideal) channel. A first PAM-4 DFE architecture has low latency from the output of the samplers to the application of the first DFE tap feedback to the input signal. This is accomplished by not decoding the sampler outputs in order to generate the feedback signal for the first DFE tap. Rather, weighted versions of the raw sampler outputs are applied directly to the input signal without further analog or digital processing. Additional PAM-4 DFE architectures use the current symbol in addition to previous symbol(s) to determine the DFE feedback signal. Another architecture transmits PAM-4 signaling using non-uniform pre-emphasis. The non-uniform pre-emphasis allows a speculative DFE receiver to resolve the transmitted PAM-4 signals with fewer comparators/samplers.
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公开(公告)号：US20200153468A1
公开(公告)日：2020-05-14
申请号：US16680859
申请日：2019-11-12
Applicant: Rambus Inc.
Inventor： Masum HOSSAIN , Nhat NGUYEN , Yikui Jen DONG , Arash ZARGARAN-YAZD , Wendemagegnehu BEYENE
Abstract: Decision feedback equalization (DFE) is used to help reduce inter-symbol interference (ISI) from a data signal received via a band-limited (or otherwise non-ideal) channel. A first PAM-4 DFE architecture has low latency from the output of the samplers to the application of the first DFE tap feedback to the input signal. This is accomplished by not decoding the sampler outputs in order to generate the feedback signal for the first DFE tap. Rather, weighted versions of the raw sampler outputs are applied directly to the input signal without further analog or digital processing. Additional PAM-4 DFE architectures use the current symbol in addition to previous symbol(s) to determine the DFE feedback signal. Another architecture transmits PAM-4 signaling using non-uniform pre-emphasis. The non-uniform pre-emphasis allows a speculative DFE receiver to resolve the transmitted PAM-4 signals with fewer comparators/samplers.
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公开(公告)号：US20230353177A1
公开(公告)日：2023-11-02
申请号：US18144342
申请日：2023-05-08
Applicant: Rambus Inc.
Inventor： Masum HOSSAIN , Nhat NGUYEN , Yikui Jen DONG , Arash ZARGARAN-YAZD , Wendemagegnehu BEYENE
CPC classification number: H04B1/123 , H04L25/03057 , H04L25/4917 , H04L27/06 , H04L27/01 , H04B1/12 , H04L27/00 , H04L25/03133 , H04L25/0264 , H04L25/03076
Abstract: Decision feedback equalization (DFE) is used to help reduce inter-symbol interference (ISI) from a data signal received via a band-limited (or otherwise non-ideal) channel. A first PAM-4 DFE architecture has low latency from the output of the samplers to the application of the first DFE tap feedback to the input signal. This is accomplished by not decoding the sampler outputs in order to generate the feedback signal for the first DFE tap. Rather, weighted versions of the raw sampler outputs are applied directly to the input signal without further analog or digital processing. Additional PAM-4 DFE architectures use the current symbol in addition to previous symbol(s) to determine the DFE feedback signal. Another architecture transmits PAM-4 signaling using non-uniform pre-emphasis. The non-uniform pre-emphasis allows a speculative DFE receiver to resolve the transmitted PAM-4 signals with fewer comparators/samplers.
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公开(公告)号：US20220149876A1
公开(公告)日：2022-05-12
申请号：US17527631
申请日：2021-11-16
Applicant: Rambus Inc.
Inventor： Masum HOSSAIN , Nhat NGUYEN , Yikui Jen DONG , Arash ZARGARAN-YAZD , Wendemagegnehu BEYENE
IPC: H04B1/12
Abstract: Decision feedback equalization (DFE) is used to help reduce inter-symbol interference (ISI) from a data signal received via a band-limited (or otherwise non-ideal) channel. A first PAM-4 DFE architecture has low latency from the output of the samplers to the application of the first DFE tap feedback to the input signal. This is accomplished by not decoding the sampler outputs in order to generate the feedback signal for the first DFE tap. Rather, weighted versions of the raw sampler outputs are applied directly to the input signal without further analog or digital processing. Additional PAM-4 DFE architectures use the current symbol in addition to previous symbol(s) to determine the DFE feedback signal. Another architecture transmits PAM-4 signaling using non-uniform pre-emphasis. The non-uniform pre-emphasis allows a speculative DFE receiver to resolve the transmitted PAM-4 signals with fewer comparators/samplers.
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公开(公告)号：US20210152205A1
公开(公告)日：2021-05-20
申请号：US17114782
申请日：2020-12-08
Applicant: Rambus Inc.
Inventor： Masum HOSSAIN , Nhat NGUYEN , Yikui Jen DONG , Arash ZARGARAN-YAZD , Wendemagegnehu BEYENE
Abstract: Decision feedback equalization (DFE) is used to help reduce inter-symbol interference (ISI) from a data signal received via a band-limited (or otherwise non-ideal) channel. A first PAM-4 DFE architecture has low latency from the output of the samplers to the application of the first DFE tap feedback to the input signal. This is accomplished by not decoding the sampler outputs in order to generate the feedback signal for the first DFE tap. Rather, weighted versions of the raw sampler outputs are applied directly to the input signal without further analog or digital processing. Additional PAM-4 DFE architectures use the current symbol in addition to previous symbol(s) to determine the DFE feedback signal. Another architecture transmits PAM-4 signaling using non-uniform pre-emphasis. The non-uniform pre-emphasis allows a speculative DFE receiver to resolve the transmitted PAM-4 signals with fewer comparators/samplers.
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