公开(公告)号：US20070115800A1

公开(公告)日：2007-05-24

申请号：US11374217

申请日：2006-03-14

申请人： John Fonseka ,  Eric Dowling

发明人： John Fonseka ,  Eric Dowling

IPC分类号： H04J11/00

CPC分类号： H04L1/0054

摘要： The present invention centers upon uplink communication protocols for use primarily with orthogonal frequency division multiple access (OFDMA) communication systems. Aspects of the invention relate to narrow band frequency division multiplexed (NBFDM) modulation protocols primarily for uplink usage in asymmetric OFDMA communication systems. In particular, NBFDM uplinks that use quadrature multiplexed continuous phase modulation are detailed and noncoherent detection schemes are developed to process the uplink channel signals without the need to transmit uplink phase reference signals. Other aspects of the invention relate to burst mode uplink communications in OFDMA systems such as those involving opportunistic beamforming.

摘要翻译： 本发明主要针对主要用于正交频分多址（OFDMA）通信系统的上行链路通信协议。 本发明的方面涉及主要用于非对称OFDMA通信系统中的上行链路使用的窄带频分复用（NBFDM）调制协议。 特别地，使用正交多路复用连续相位调制的NBFDM上行链路是详细的，并且开发非相干检测方案来处理上行链路信道信号，而不需要发送上行链路相位参考信号。 本发明的其他方面涉及OFDMA系统中的突发模式上行链路通信，例如涉及机会性波束形成的突发模式上行链路通信。

公开(公告)号：US20060109917A1

公开(公告)日：2006-05-25

申请号：US10994465

申请日：2004-11-22

申请人： John Fonseka ,  Jin Liu

发明人： John Fonseka ,  Jin Liu

IPC分类号： H04B14/04 ,  H04L7/06

CPC分类号： H04L25/4908

摘要： Binary data signal multi-line interval encoding and decoding arrangements supporting high speed data communications consistent with certain embodiments produce a signal having a plurality of pulses with a minimum pulse duration of T. The pulses are arranged in a signal pattern selected as one of M possible signal patterns of L bits transmitted over N time intervals, with each time interval being of T seconds in duration, to represent one of M possible message sequence, where M>2N. The plurality of pulses have transitions that occur at times falling between the boundaries of the time interval T. Embodiments may be implemented in hardware, with a computer executing a software program within, or with both. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

摘要翻译： 支持与某些实施例相一致的高速数据通信的二进制数据信号多行间隔编码和解码装置产生具有最小脉冲持续时间T的多个脉冲的信号。脉冲被布置成以M个可能的方式选择的信号图案 在N个时间间隔中传送的L位的信号模式，其中每个时间间隔的持续时间为T秒，以表示M个可能的消息序列之一，其中M> 2 N。 多个脉冲具有在时间间隔T的边界之间出现的转变。实施例可以硬件实现，其中计算机在其内部执行软件程序。 该摘要不被认为是限制性的，因为其他实施例可能偏离本摘要中描述的特征。

公开(公告)号：US08448054B2

公开(公告)日：2013-05-21

申请号：US12385469

申请日：2009-04-09

申请人： Eric Morgan Dowling ,  John Fonseka

发明人： Eric Morgan Dowling ,  John Fonseka

IPC分类号： H03M13/00

CPC分类号： H04L1/006 ,  H04L1/0041 ,  H04L1/0054 ,  H04L27/34

摘要： An improved mapping policy, signal mapper, transmitter, receiver, and communication system are introduced. The improved signal mapping policy alternates between standard and inverted bit mapping functions at selected phase states to reduce the error coefficient of MSK and other types of CPFSK signals. The proposed policy can more generally be applied to other types of signals with memory as well. Simulations show that the mapping policy can significantly improve performance particularly at lower to moderate SNR values.

摘要翻译： 介绍了改进的映射策略，信号映射器，发射机，接收机和通信系统。 改进的信号映射策略在所选相位状态下在标准和反相位映射函数之间交替，以减少MSK和其他类型的CPFSK信号的误差系数。 所提出的策略可以更一般地应用于具有存储器的其它类型的信号。 模拟显示，映射策略可以显着提高性能，特别是在低到中等SNR值时。

公开(公告)号：US20070092018A1

公开(公告)日：2007-04-26

申请号：US11253730

申请日：2005-10-20

申请人： John Fonseka ,  Eric Dowling

发明人： John Fonseka ,  Eric Dowling

IPC分类号： H04L23/02

CPC分类号： H04L1/0054

摘要： A class of bandwidth reduction techniques are used develop a broad class of modulation types collectively called SSB-FM. These signals can be used to construct communication systems that provide bandwidth-normalized performance gains of 10 dB or more when compared to popular prior art modulation methods. An aspect of the invention involves mapping trellis paths in a complex signal space onto corresponding real-valued trellis signals with desirable spectral properties. The invention can be used map continuous phase modulated (CPM) signals onto simpler amplitude-modulated trellis signals having double the channel capacity of prior art CPM signals. Multi-amplitude signaling and frequency division multiplexing may also be incorporated to further accommodate more information per symbol.

摘要翻译： 使用一类带宽简化技术来开发统称为SSB-FM的广泛类型的调制类型。 与传统的现有技术调制方法相比，这些信号可用于构建提供10dB或更大带宽标准化性能增益的通信系统。 本发明的一个方面涉及将复信号空间中的网格路径映射到具有期望的光谱特性的相应的实值格子信号上。 本发明可以将地图连续相位调制（CPM）信号用于具有现有技术CPM信号的两倍的信道容量的更简单的幅度调制网格信号。 还可以并入多幅度信令和频分复用以进一步容纳每个符号的更多信息。