Highly-spectrally-efficient reception using orthogonal frequency division multiplexing
    61.
    发明授权
    Highly-spectrally-efficient reception using orthogonal frequency division multiplexing 有权
    使用正交频分复用的高频率接收

    公开(公告)号:US08737458B2

    公开(公告)日:2014-05-27

    申请号:US13921710

    申请日:2013-06-19

    申请人: MagnaCom Ltd.

    IPC分类号: H03K5/159

    摘要: Circuitry for use in a receiver may comprise: a front-end circuit operable to receive an orthogonal frequency division multiplexing (OFDM) symbol on a first number of physical subcarriers. The circuitry may comprise a decoding circuit operable to decode the OFDM symbol using an inter-carrier interference (ICI) model, the decoding resulting in a determination of a sequence of symbols, comprising a second number of symbols, that most-likely correspond to the received OFDM symbol, where the second number is greater than the first number. The sequence of symbols may comprise N-QAM symbols, N being an integer. The ISCI model may be based, at least in part, on non-linearity experienced by the OFDM symbol during transmission by a transmitter, propagation over a channel, and/or reception by the receiver. The ISCI model may be based, at least in part, on phase-noise introduced to the OFDM symbol during transmission by a transmitter, propagation over a channel, and/or reception by the receiver.

    摘要翻译: 用于接收机的电路可以包括:前端电路,其可操作以在第一数量的物理子载波上接收正交频分复用(OFDM)符号。 电路可以包括解码电路,其可操作以使用载波间干扰(ICI)模型来解码OFDM符号,所述解码导致确定符号序列,其包括第二数量的符号,其最可能对应于 接收到的OFDM符号,其中第二个数字大于第一个数字。 符号序列可以包括N-QAM符号,N是整数。 至少部分地,ISCI模型可以基于由发射机传输期间由OFDM符号经历的非线性度,在信道上传播和/或由接收机接收。 至少部分地,ISCI模型可以基于由发射机传输期间引入到OFDM符号的相位噪声,在信道上传播和/或接收器的接收。

    Signal acquisition in a multimode environment
    67.
    发明授权
    Signal acquisition in a multimode environment 有权
    在多模式环境中采集信号

    公开(公告)号:US09496900B2

    公开(公告)日:2016-11-15

    申请号:US14704260

    申请日:2015-05-05

    申请人: MagnaCom Ltd.

    IPC分类号: H04B1/04 H04L1/00

    摘要: A transmitter comprises a symbol mapper operable to map a frame of bits to a frame of symbols, where the symbols correspond to a determined modulation scheme, and circuitry operable to convert the frame of symbols to a physical layer signal and transmit the physical layer signal onto a communication medium. The circuitry is operable to process the physical layer signal such that a first portion of the physical layer signal is a first type of signal (e.g., a linear signal and/or non-ISC signal) and a second portion of the physical layer signal is a second type of signal (e.g., nonlinear signal and/or ISC signal). The first portion of the physical layer signal may comprise a header, a preamble, and/or a payload of the frame. The second portion of the physical layer signal may comprise a header, a preamble, and/or a payload of the frame.

    摘要翻译: 发射机包括符号映射器,其可操作以将比特帧映射到符号帧,其中符号对应于确定的调制方案,以及可操作以将符号帧转换为物理层信号并将物理层信号发送到 通信媒体。 电路可操作以处理物理层信号,使得物理层信号的第一部分是第一类型的信号(例如,线性信号和/或非ISC信号),物理层信号的第二部分是 第二类信号(例如,非线性信号和/或ISC信号)。 物理层信号的第一部分可以包括帧的头部,前导码和/或有效载荷。 物理层信号的第二部分可以包括帧的头部,前导码和/或有效载荷。

    Dynamic configuration of modulation and demodulation
    70.
    发明授权
    Dynamic configuration of modulation and demodulation 有权
    调制解调动态配置

    公开(公告)号:US09276619B1

    公开(公告)日:2016-03-01

    申请号:US14563046

    申请日:2014-12-08

    申请人: MagnaCom Ltd.

    IPC分类号: H04K1/02 H04B1/10 H04B1/04

    摘要: A modulator and demodulator pair may switch configurations without introducing errors as a result of the switch. Different configurations may, for example, correspond to different symbol rates and/or different amounts of controlled inter-symbol interference (ISI) introduced to the transmitted signal. For example, a first configuration may use be a near-zero ISI configuration (e.g., using Nyquist signaling) and a second configuration may introduce a significant (e.g., amount that would result in errors above a desired threshold if demodulation relied on symbol-by-symbol slicing) but controlled amount of ISI (e.g., using partial response or faster-than-Nyquist-rate signaling). Switching between modulator/demodulator configurations may be needed to maintain a stable link in the case of dynamic channels. At any given time, a modulator and demodulator pair may, for example, switch to a configuration that provides maximal throughput for the current channel conditions.

    摘要翻译: 调制器和解调器对可以切换配置,而不会由于切换而导致错误。 例如,不同的配置可以对应于引入到发射信号的不同符号速率和/或受控符号间干扰(ISI)的不同量。 例如,第一配置可以是接近零的ISI配置(例如,使用奈奎斯特信令),并且第二配置可以引入显着的(例如,如果解调依赖于符号依赖,则将导致错误高于期望阈值的量) 符号限制),但受控量的ISI(例如,使用部分响应或比奈奎斯特速率更快的信令)。 在动态通道的情况下,可能需要在调制器/解调器配置之间切换以维持稳定的链路。 在任何给定时间,调制器和解调器对可以例如切换到为当前信道条件提供最大吞吐量的配置。