公开(公告)号：US20160006558A1

公开(公告)日：2016-01-07

申请号：US14768663

申请日：2014-02-19

Applicant: UNIVERSITY OF SOUTH AUSTRALIA

Inventor： William George COWLEY ,  Robert George McKILLIAM ,  Andre POLLOK

IPC: H04L7/00 ,  H04L27/227 ,  H04L7/04

CPC classification number: H04L7/0087 ,  H04L1/0054 ,  H04L5/0023 ,  H04L7/042 ,  H04L27/00 ,  H04L27/18 ,  H04L27/2278 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2679

Abstract: A method for estimating a time offset of a transmitted signal which comprises pilot symbols and data symbols, the method comprising: receiving the transmitted signal to produce a received signal; and processing an optimising function of the received signal at a finite number of possible time offsets to produce an estimator of the time offset.

Abstract translation: 一种用于估计包括导频符号和数据符号的发射信号的时间偏移的方法，所述方法包括：接收所发送的信号以产生接收信号; 以及在有限数量的可能的时间偏移处理所述接收信号的优化功能以产生所述时间偏移的估计器。

公开(公告)号：US20150312073A1

公开(公告)日：2015-10-29

申请号：US14651941

申请日：2013-12-13

Applicant: UNIVERSITY OF SOUTH AUSTRALIA

Inventor： William George COWLEY ,  Robert George MCKILLIAM ,  Andre POLLOK

IPC: H04L27/227 ,  H04L27/38 ,  H04L5/00

CPC classification number: H04L27/2271 ,  H04L5/006 ,  H04L27/18 ,  H04L27/2275 ,  H04L27/2332 ,  H04L27/38 ,  H04L2025/03401 ,  H04L2025/03649

Abstract: A least squares estimator of carrier phase and amplitude in a receiver in a communication system using a phase shift keying modulation scheme that uses both known pilot symbols and unknown data symbols is described. That is, the method exploits knowledge of pilot symbols in addition to the unknown data symbols to estimate carrier phase and amplitude. Further, an efficient recursion based estimation method is described that only requires O(L. log L) arithmetic operations where L is the number of received signals. This method uses the M-Ary rounded phase offsets to sort the data symbols and this sorted order is used to recursively calculate candidate values in an optimisation process. Simulation results show that the estimation methods Using data and pilot symbols outperform estimation methods using only data symbols (ie non-coherent detection methods). Further, the system can be used for systems using multiple M-ary phase shift keying digital modulation schemes.

Abstract translation: 描述使用使用已知导频符号和未知数据符号的相移键控调制方案的通信系统中的接收机中的载波相位和幅度的最小二乘估计器。 也就是说，除了未知数据符号之外，该方法利用导频符号的知识来估计载波相位和幅度。 此外，描述了仅需要O（L·log L）算术运算的有效的基于递归的估计方法，其中L是接收信号的数量。 该方法使用M-Ary舍入相位偏移对数据符号进行排序，并且该排序顺序用于在优化过程中递归计算候选值。 仿真结果表明，使用数据和导频符号的估计方法优于仅使用数据符号的估计方法（即非相干检测方法）。 此外，该系统可以用于使用多个M相移键控数字调制方案的系统。

公开(公告)号：US20140125577A1

公开(公告)日：2014-05-08

申请号：US13964828

申请日：2013-08-12

Applicant: UNIVERSITY OF SOUTH AUSTRALIA

Inventor： Thuong N. HOANG ,  Bruce Hunter THOMAS

IPC: G06F3/01

CPC classification number: G06F3/017 ,  G06F3/014 ,  G06F3/04815

Abstract: User input gloves and input methods are described that are well suited to provide input to computer modeling (eg CAD) and augmented reality (AR) systems, including wearable AR and spatial AR. Each glove comprises palm mounted ultrasonic transducers, accelerometers, finger based pinch inputs and a wireless communication module. The gloves can be used to measure distances over the natural range of distances that hands can be placed, as well as their orientation, with sufficient resolution to facilitate a range of gesture based input methods to be developed and utilized, including distance-based modeling by measurement. Further the gloves are light weight, allow fast input of modeling measurements, are easy to use, and reduce fatigue compared to existing glove based input systems. The user input gloves, and associated input techniques can be used to measure small and body sized objects using one or two hands, and large objects can be measured using single handed measurements. Further models for both small and large objects can be generated and manipulated through the use of a numeric input technique to obtain an amplification factor to magnify the effective distances measured.

Abstract translation: 描述了用户输入手套和输入方法，其非常适合于为计算机建模（例如CAD）和增强现实（AR）系统（包括可穿戴AR和空间AR）提供输入。 每个手套包括手掌式超声波换能器，加速度计，基于手指的夹点输入和无线通信模块。 手套可以用于测量手可以放置的距离的自然距离以及它们的方向上的距离，具有足够的分辨率，以便于开发和利用基于手势的输入方法的范围，包括基于距离的建模 测量。 此外，与现有的基于手套的输入系统相比，手套重量轻，允许快速输入建模测量，易于使用，并减少疲劳。 用户输入手套和相关的输入技术可用于使用一只或两只手测量小型和身体尺寸的物体，并且可以使用单手测量来测量大型物体。 可以通过使用数字输入技术来生成和操纵小型和大型物体的其他模型，以获得放大系数，以放大所测量的有效距离。

公开(公告)号：US20040264561A1

公开(公告)日：2004-12-30

申请号：US10897886

申请日：2004-07-23

Applicant: Cohda Wireless Pty Ltd ,  University of South Australia

Inventor： Paul Dean Alexander ,  Alexander James Grant ,  Lars Kildehoj Rasmussen ,  Stephen Peter Jakas

IPC: H04K001/00

CPC classification number: H04L25/0202 ,  H04L25/0204 ,  H04L25/03171 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675

Abstract: The present invention relates to improved multiple access communications. In one form, the invention relates to an improved signal processing method and apparatus for an iterative method of determining the reception of a signal in a multi user packet based wireless OFDM (Orthogonal Frequency Division Multiplexing) communication system. In other forms the present invention provides recursive filtering for joint iterative decoding in a variety of systems and functions such as linear multiple access channel decoders, iterative equalisation, iterative joint channel estimation and detection/decoding, iterative space-time processing, iterative multi user interference cancellation and iterative demodulation. In one particular form the present invention provides an iterative decoding circuit for a wireless multiuser communications receiver comprising a first signal processing means for receiving at least one received signal, said first signal processing means comprising at least two linear iterative filters such that the first linear iterative filter provides an estimate of a selected received signal to an estimated signal output and a second linear iterative filter provides estimates of at least one other received signal, delayed by one iteration cycle, to an input of said first linear iterative filter, a second signal processing means for receiving the estimated signal output of the first linear iterative filter and providing a further received signal estimate to the input of the first signal processing means in a succeeding iteration cycle of the decoding circuit.

Abstract translation: 本发明涉及改进的多址通信。 在一种形式中，本发明涉及一种用于在基于多用户分组的无线OFDM（正交频分复用）通信系统中确定信号的接收的迭代方法的改进的信号处理方法和装置。 在其他形式中，本发明提供了各种系统和功能中的联合迭代解码的递归滤波，例如线性多址信道解码器，迭代均衡，迭代联合信道估计和检测/解码，迭代空时处理，迭代多用户干扰 取消和迭代解调。 在一个特定形式中，本发明提供了一种用于无线多用户通信接收机的迭代解码电路，包括用于接收至少一个接收信号的第一信号处理装置，所述第一信号处理装置包括至少两个线性迭代滤波器，使得第一线性迭代 滤波器将所选接收信号的估计提供给估计的信号输出，第二线性迭代滤波器将延迟了一个迭代周期的至少一个其它接收信号的估计提供给所述第一线性迭代滤波器的输入，第二信号处理 用于接收所述第一线性迭代滤波器的估计信号输出并且在所述解码电路的后续迭代循环中向所述第一信号处理装置的输入提供另外的接收信号估计的装置。