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    • 43. 发明申请
    • SYSTEM FOR ADAPTIVE VOICE INTELLIGIBILITY PROCESSING
    • 自适应语音智能处理系统
    • US20110066428A1
    • 2011-03-17
    • US12559329
    • 2009-09-14
    • Jun YangRichard J. OliverJames Tracey
    • Jun YangRichard J. OliverJames Tracey
    • G10L19/14
    • G10L21/0208A61M5/168A61M5/1723
    • An adaptive audio system can be implemented in a communication device. The adaptive audio system can enhance voice in an audio signal received by the communication device to increase intelligibility of the voice. The audio system can adapt the audio enhancement based at least in part on levels of environmental content, such as noise, that are received by the communication device. For higher levels of environmental content, for example, the audio system might apply the audio enhancement more aggressively. Additionally, the adaptive audio system can detect substantially periodic content in the environmental content. The adaptive audio system can further adapt the audio enhancement responsive to the environmental content.
    • 自适应音频系统可以在通信设备中实现。 自适应音频系统可以增强由通信设备接收的音频信号中的语音,以增加语音的可懂度。 音频系统可以至少部分地基于由通信设备接收的诸如噪声的环境内容的级别来适应音频增强。 对于较高级别的环境内容,例如,音频系统可以更积极地应用音频增强。 此外,自适应音频系统可以检测环境内容中的实质上周期性的内容。 自适应音频系统可以进一步适应响应于环境内容的音频增强。
    • 48. 发明申请
    • Integer Spreading Rotation Matrices for Qam Constellations and Its Application to Decode-Remodulate-Forward Cooperative Communication Strategy
    • 整数传播Qam星座的旋转矩阵及其在解码转发协作通信策略中的应用
    • US20080317168A1
    • 2008-12-25
    • US12096975
    • 2006-12-08
    • Jun YangMonisha Ghosh
    • Jun YangMonisha Ghosh
    • H04L27/36
    • H04B7/026H04B7/0848H04B7/15592H04L27/2626H04L27/3405H04L27/3483
    • Diversity techniques are commonly used in wireless communications to combat multi-path fading. Recent interests in ultra-wideband technology focus on multi-band OFDM systems that can explore the high diversity due to the independent frequency bands. To achieve full diversity with high data rate, a system (800), apparatus (500) and method that uses coded modulation with spreading rotation of transmitted signals. A 2×2 integer rotation matrix for QAM signals, 3×3 and 4×4 integer rotation matrices for QAM signals are provided. Compared with the non-regular QAM shape for real rotation matrices, each of these integer rotation matrices makes the regular QAM shape after rotation. The systematic design of these spreading matrices can be used to simplify the receiver structure such as simplified ML, MMSE and ZF, and then reduce their decoding complexity. Further, the present invention achieves cooperative diversity not only from distributed users but also from the signal space diversity of each user. An embodiment is provided for a cooperative system (100) in which different rows of integer rotation matrices are used by a source and relays as a modulation scheme to increase cooperative diversity.
    • 无线通信中通常使用分集技术来对抗多径衰落。 最近对超宽带技术的兴趣集中在可以探索由于独立频带引起的高分集的多频带OFDM系统。 为了实现具有高数据速率的完全分集,使用传输信号的扩展旋转的编码调制的系统(800),装置(500)和方法。 提供了用于QAM信号的2x2整数旋转矩阵,用于QAM信号的3x3和4x4整数旋转矩阵。 与实际旋转矩阵的非规则QAM形状相比,这些整数旋转矩阵中的每一个使旋转后成为正常的QAM形状。 这些扩展矩阵的系统设计可以用于简化接收机结构,如简化的ML,MMSE和ZF,然后降低它们的解码复杂度。 此外,本发明不仅从分布式用户获得协作分集,而且实现了来自每个用户的信号空间分集的协作分集。 提供了一种用于协作系统(100)的实施例,其中由源和中继使用不同行的整数旋转矩阵作为调制方案以增加协作分集。