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    Methods and apparatus for signal transmission and reception in a broadband communication system
    6.
    发明授权
    Methods and apparatus for signal transmission and reception in a broadband communication system 有权
    宽带通信系统中信号发送和接收的方法和装置

    公开(公告)号：US08094611B2

    公开(公告)日：2012-01-10

    申请号：US12975226

    申请日：2010-12-21

    申请人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

    发明人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

    IPC分类号： H04Q7/00

    CPC分类号： H04L27/2626 ,  H04B1/707 ,  H04B1/711 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0028 ,  H04L25/0228 ,  H04L25/03834 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647 ,  H04L27/2655

    摘要： In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.

    摘要翻译： 在宽带无线通信系统中，扩频信号有意地与OFDM信号在时域，频域或两者中重叠。 固有地具有高频谱效率的OFDM信号被用于承载宽带数据或控制信息。 被设计为具有用于克服严重干扰的高扩展增益的扩频信号用于促进系统功能，例如初始随机接入，信道探测或短消息传送。 设计了方法和技术，以确保重叠的信号之间的相互干扰被最小化，以对两个信号具有不显着的影响，并且两个信号可由接收机预期的性能来检测。

    Methods and apparatus for cellular broadcasting and communication system
    7.
    发明授权
    Methods and apparatus for cellular broadcasting and communication system 有权
    蜂窝广播通信系统的方法与装置

    公开(公告)号：US08089911B2

    公开(公告)日：2012-01-03

    申请号：US11571468

    申请日：2006-03-24

    申请人： Haiming Huang ,  Xiaodong Li ,  Titus Lo ,  Kemin Li

    发明人： Haiming Huang ,  Xiaodong Li ,  Titus Lo ,  Kemin Li

    IPC分类号： H04H20/71 ,  H04W4/00

    CPC分类号： H04L12/1881 ,  H04L1/0003 ,  H04L1/0061 ,  H04L1/18 ,  H04L5/0007 ,  H04L5/14 ,  H04L2001/0093 ,  H04N21/2385 ,  H04N21/26208 ,  H04N21/44209 ,  H04N21/6131 ,  H04N21/6582 ,  H04W52/0216 ,  H04W72/005 ,  H04W72/04 ,  H04W84/042 ,  H04W92/10 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168

    摘要： In a cellular wireless network, methods and apparatus are disclosed for a signal broadcasting scheme that can be individually augmented for users with poor reception. The network employs a first downlink channel (broadcast CH) for broadcasting data to all mobile stations (S1, S2, S3), a second downlink channel (regular CH) for sending signals to a specific mobile station in a cell, and an uplink channel for feeding back information to the base station. To achieve a certain user reception quality, the system adjusts its broadcasting parameters based on the statistical analysis of the feedback data (feedback). If some users still require better reception, the system individually augments their broadcast signals via the second downlink channels. Methods and apparatus are also disclosed for synchronization of data distribution by base stations (1,2), which, in part, allows the receivers to combine the receiving signals and improve their reception quality.

    摘要翻译： 在蜂窝无线网络中，公开了用于信号广播方案的方法和装置，其可以针对接收不良的用户单独增强。 网络采用用于向所有移动台（S1，S2，S3）广播数据的第一下行链路信道（广播CH），用于向小区中的特定移动台发送信号的第二下行链路信道（常规CH），以及上行链路信道 用于将信息反馈给基站。 为了达到一定的用户接收质量，系统会根据反馈数据（反馈）的统计分析来调整广播参数。 如果一些用户仍然需要更好的接收，则系统通过第二下行链路信道单独地增加其广播信号。 还公开了用于基站（1,2）的数据分发同步的方法和装置，其部分地允许接收机组合接收信号并提高其接收质量。

    Methods and Apparatus for Overlaying Multi-Carrier and Direct Sequence Spread Spectrum Signals in a Broadband Wireless Communication System
    9.
    发明申请
    Methods and Apparatus for Overlaying Multi-Carrier and Direct Sequence Spread Spectrum Signals in a Broadband Wireless Communication System 有权
    在宽带无线通信系统中覆盖多载波和直接序列扩频信号的方法和装置

    公开(公告)号：US20080304551A1

    公开(公告)日：2008-12-11

    申请号：US10583229

    申请日：2005-01-27

    申请人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

    发明人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

    IPC分类号： H04B7/216

    CPC分类号： H04L27/2626 ,  H04B1/707 ,  H04B1/711 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0028 ,  H04L25/0228 ,  H04L25/03834 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647 ,  H04L27/2655

    摘要： A broadband wireless communication system, wherein both Multi-Carrier (MC) and Direct Sequence Spread Spectrum (DSSS) signals are intentionally overlaid together, in both time and frequency domains. The overlaying mitigates the weaknesses of each technique. The MC signal carries the broadband data signal and takes advantage of its high spectral efficiency, while the DSSS signal is used for special purpose processing such as initial random access, channel probing, and short messaging, where properties such as signal simplicity, self synchronization, and performance under severe interference are desired. The methods and techniques ensure that the MC and the DSSS signals are both distinguishable and that the interference between the overlaid signals is minimized to have insignificant impact on the expected performance of either signal.

    摘要翻译： 宽带无线通信系统，其中多载波（MC）和直接序列扩频（DSSS）信号在时域和频域都有意地叠加在一起。 覆盖减轻了每种技术的缺点。 MC信号承载宽带数据信号，并利用其高频谱效率，而DSSS信号用于诸如初始随机接入，信道探测和短消息等专用处理，其中诸如信号简单性，自同步性， 并且需要在严重干扰下的性能。 这些方法和技术确保MC和DSSS信号都是可区分的，并且覆盖的信号之间的干扰被最小化，对任一信号的预期性能没有显着的影响。

    Methods and Apparatus for Multi-Carrier Communications with Variable Channel Bandwidth
    10.
    发明申请
    Methods and Apparatus for Multi-Carrier Communications with Variable Channel Bandwidth 有权
    用于具有可变信道带宽的多载波通信的方法和装置

    公开(公告)号：US20070242600A1

    公开(公告)日：2007-10-18

    申请号：US10583534

    申请日：2005-04-29

    申请人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

    发明人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

    IPC分类号： H04J11/00

    CPC分类号： H04L5/0007 ,  H04L5/0021 ,  H04L5/0028 ,  H04L5/0041 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0064 ,  H04L5/0094 ,  H04L5/1469 ,  H04L27/2613 ,  H04W48/16 ,  H04W72/00 ,  H04W72/005 ,  H04W72/042 ,  H04W76/10

    摘要： Methods and apparatus for multi-carrier communication with variable channel bandwidth are disclosed, where the time frame structure and the OFDM symbol structure are invariant and the frequency-domain signal structure is flexible. In one embodiment, a mobile station, upon entering a geographic area, uses a core-band to initiate communication and obtain essential information and subsequently switches to full operating bandwidth of the area for the remainder of the communication. If the mobile station operates in a wide range of bandwidths, the mobile station divides the full range into sub-ranges and adjusts its sampling frequency and its FFT size in each sub-range.

    摘要翻译： 公开了具有可变信道带宽的多载波通信的方法和装置，其中时间帧结构和OFDM符号结构是不变的，并且频域信号结构是灵活的。 在一个实施例中，移动站在进入地理区域时使用核心频带来发起通信并获得必要的信息，随后在通信的剩余部分中切换到该区域的完整工作带宽。 如果移动站在宽带宽范围内工作，则移动站将全部范围划分为子范围，并在每个子范围内调整其采样频率及其FFT大小。