公开(公告)号：US10425256B2

公开(公告)日：2019-09-24

申请号：US15889919

申请日：2018-02-06

申请人： Mrinmoy Jana ,  Jeebak Mitra ,  Lutz Hans-Joachim Lampe

发明人： Mrinmoy Jana ,  Jeebak Mitra ,  Lutz Hans-Joachim Lampe

IPC分类号： H04L25/03 ,  H04B7/0408

摘要： An interference mitigation apparatus, comprising: an adaptive feedforward filtering stage and an adaptive feedback filtering stage configured to produce a plurality of output signals from a plurality of frequency downconverted signals, the output signals for being provided to a data decoding stage; a plurality of phase rotators configured to apply phase rotation to the frequency downconverted signals prior to processing by the adaptive feedforward filtering stage and the adaptive feedback filtering stage; and an adaptive controller configured for varying an amount of the phase rotation applied by the phase rotators to the frequency downconverted signals based at least in part on symbol decisions made on the output signals. There may be second phase rotators configured to apply phase rotation after the adaptive feedforward filtering stage so as to produce the output signals for forwarding to the data decoding stage.

公开(公告)号：US11271659B1

公开(公告)日：2022-03-08

申请号：US17001299

申请日：2020-08-24

申请人： Mrinmoy Jana ,  Jeebak Mitra ,  Lutz Hans-Joachim Lampe ,  Jin Wang ,  Zhuhong Zhang

发明人： Mrinmoy Jana ,  Jeebak Mitra ,  Lutz Hans-Joachim Lampe ,  Jin Wang ,  Zhuhong Zhang

IPC分类号： H04B10/61 ,  H04L5/00 ,  H04L25/03 ,  H04B10/00 ,  H04B10/079 ,  H04B10/25

摘要： A receiver architecture is described for phase noise compensation in the presence of inter-channel interference (ICI) and inter-symbol interference (ISI), particularly for time-frequency packing (TFP) transmissions. The receiver includes a coarse phase noise (PN) estimator, a PN compensation module, an ICI cancellation module, an ISI compensation module, a FEC decoder, and an iterative PN estimator. The iterative PN estimator receives log likelihood ratio (LLR) information from the decoder and provides an iterative PN estimation to the PN compensation module. The decoder also provides LLR to the ISI compensation module, and to at least one other receiver for another subchannel that is immediately adjacent in frequency. The ICI cancellation module receives decoder output from at least one adjacent subchannel, which the ICI cancellation module uses to provide a ICI-cancelled signal.

公开(公告)号：US10003390B2

公开(公告)日：2018-06-19

申请号：US15341227

申请日：2016-11-02

申请人： Mrinmoy Jana ,  Jeebak Mitra ,  Lutz Hans-Joachim Lampe ,  Ahmed Mohamed Ibrahim Medra

发明人： Mrinmoy Jana ,  Jeebak Mitra ,  Lutz Hans-Joachim Lampe ,  Ahmed Mohamed Ibrahim Medra

IPC分类号： H04L25/49 ,  H04B7/0456 ,  H04B7/0417 ,  H04L25/03

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/10 ,  H04L1/00 ,  H04L25/03343 ,  H04L25/03834 ,  H04L25/4975

摘要： Systems and methods of precoded faster than Nyquist (FTN) signalling are provided. In the transmitter, Tomlinson-Harashima Preceding (THP) is applied to produce precoded symbols. The THP is based on inter-symbol interference (ISI) due to using faster than Nyquist (FTN) signalling. An inverse modulo operation is not performed in the receiver. Instead, in the receiver, FTN processing is performed based on a matched filter output by determining log a-posteriori probability ratio LAPPR values computed for an nth bit bn of a kth received symbol and pre-computed a-priori probabilities of an extended constellation for a given pulse shape h(t) and FTN acceleration factor combination.

公开(公告)号：US20130128937A1

公开(公告)日：2013-05-23

申请号：US13463445

申请日：2012-05-03

申请人： Gowrisankar SOMICHETTY ,  Djordje Tujkovic ,  Shashidhar Vummintala ,  Mrinmoy Jana

发明人： Gowrisankar SOMICHETTY ,  Djordje Tujkovic ,  Shashidhar Vummintala ,  Mrinmoy Jana

IPC分类号： H04W24/00

CPC分类号： H04W52/0216 ,  H03D7/16 ,  H04L41/0803 ,  H04W28/0263 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/23 ,  Y02D70/24

摘要： A wireless receiver is disclosed that is capable of efficiently selecting a preferred transmission/detection scheme for use in wireless communication. The wireless receiver may be capable of communicating using any one of several transmission/detection schemes. Therefore, in order to select a preferred transmission/detection scheme, the wireless receiver calculates at least one metric for the transmission/detection schemes. In MIMO systems, the link adaptation is more complex and the metrics typically must be more accurate. Because of the potentially substantial amount of calculation that may be required to calculate the metric, the wireless receiver is capable of performing the individual calculations in optimized ways, as well as easily reducing the total number of metrics required to be calculated so as to reduce overall complexity.

摘要翻译： 公开了能够有效地选择用于无线通信中的优选传输/检测方案的无线接收机。 无线接收机可以能够使用几种传输/检测方案中的任何一种进行通信。 因此，为了选择优选的发送/检测方案，无线接收机计算发送/检测方案的至少一个度量。 在MIMO系统中，链路自适应更加复杂，并且度量通常必须更准确。 由于计算度量可能需要大量计算，因此无线接收器能够以优化的方式执行单独的计算，并且可以轻松地减少所需的计算总数，以减少整体 复杂。