公开(公告)号：US07218604B2

公开(公告)日：2007-05-15

申请号：US10060502

申请日：2002-01-30

申请人： Srinath Hosur ,  Dennis Rauschmayer

发明人： Srinath Hosur ,  Dennis Rauschmayer

IPC分类号： H04J11/00

CPC分类号： H04L27/2602

摘要： A wireless transmitter (TX1). The transmitter comprises circuitry for providing a plurality of control (CONTROL) bits and circuitry for providing a plurality of user (USER) bits. The transmitter also comprises circuitry for modulating (16) the plurality of control bits and the plurality of user bits into a stream of complex symbols and circuitry (18) for converting the stream of complex symbols into a parallel plurality of complex symbol streams. The transmitter also comprises circuitry (20) for performing an inverse fast Fourier transform on the parallel plurality of complex symbol streams to form a parallel plurality of OFDM symbols and circuitry (22) for converting the parallel plurality of OFDM symbols into a serial stream of OFDM symbols. Each OFDM symbol in the serial stream of OFDM symbols comprises a plurality of data points, and selected (SF2.x) OFDM symbols in the serial stream of OFDM symbols carry modulation information (AMOD). The modulation information in one or more of the selected OFDM symbols comprises a plurality of modulation groups, and the plurality of modulation groups comprises a number of modulation parameters that describe modulation of a corresponding set of data points in a subsequent OFDM symbol in the serial stream of OFDM symbols.

摘要翻译： 无线发射机（TX <1> ）。 发射机包括用于提供多个控制（CONTROL）比特和用于提供多个用户（USER）比特）的电路的电路。 所述发射机还包括用于将所述多个控制比特和所述多个用户比特调制（16）为复数符号流和电路（18）的电路，用于将复符号流转换为并行多个复符号流。 发射机还包括用于对并行多个复符号流执行快速傅立叶逆变换的电路（20），以形成并行多个OFDM符号和电路（22），用于将并行多个OFDM符号转换成OFDM的串行流 符号。 OFDM符号的串行流中的每个OFDM符号包括多个数据点，并且在OFDM符号的串行流中选择的（SF×2.×N）个OFDM符号携带调制信息（AMOD）。 所选择的OFDM符号中的一个或多个中的调制信息包括多个调制组，并且所述多个调制组包括多个调制参数，所述调制参数描述在串行流中随后的OFDM符号中对应的一组数据点的调制 的OFDM符号。

公开(公告)号：US07324606B2

公开(公告)日：2008-01-29

申请号：US10001986

申请日：2001-10-31

申请人： Henry Stephen Eilts ,  Srinath Hosur ,  David Patrick Magee ,  Dennis Rauschmayer

发明人： Henry Stephen Eilts ,  Srinath Hosur ,  David Patrick Magee ,  Dennis Rauschmayer

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L25/0204 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2647

摘要： A system and method is provided for determining a channel estimate utilizing partial channel estimates to provide an aggregated channel estimate. A partial channel estimate is determined upon receipt of a data burst, such that a different subset of the channel estimate is updated every data burst. As a result, Fast Fourier Transform computations can be reduced by determining a portion of the channel estimate each data burst as opposed to determining a full channel estimate every data burst.

摘要翻译： 提供了一种用于使用部分信道估计来确定信道估计以提供聚合信道估计的系统和方法。 在接收到数据脉冲串时确定部分信道估计，使得每个数据突发更新信道估计的不同子集。 结果，通过确定每个数据脉冲串的信道估计的一部分，可以减少快速傅里叶变换计算，而不是确定每个数据脉冲串的全频道估计。

公开(公告)号：US06898418B2

公开(公告)日：2005-05-24

申请号：US10003861

申请日：2001-11-02

申请人： Dennis Rauschmayer

发明人： Dennis Rauschmayer

IPC分类号： H04L1/00 ,  H04L1/18 ,  H04L1/20 ,  H04W84/14 ,  H04B1/00

CPC分类号： H04L1/0034 ,  H04L1/0003 ,  H04L1/18 ,  H04W84/14

摘要： Available quadrature amplitude modulation (“QAM”) carriers transmittable by a base station to customer sites are substantially equally divided among the sites according to the expected quality of reception. ARQ transmissions from the sites are monitored as a measure of the quality of signals received by the sites. If the quality of received signals is unacceptable, the affected site is re-assigned to a higher quality QAM. In addition, if the quality of received signals is too high, the affected site is re-assigned to a lower quality QAM.

摘要翻译： 根据预期的接收质量，可由基站向客户站点发送的可用的正交幅度调制（“QAM”）载波在站点之间基本上相等地分配。 监控站点的ARQ传输作为站点接收信号质量的度量。 如果接收到的信号的质量是不可接受的，则将受影响的站点重新分配给更高质量的QAM。 另外，如果接收到的信号的质量太高，则受影响的站点被重新分配给较低质量的QAM。