公开(公告)号：US20160337891A1

公开(公告)日：2016-11-17

申请号：US15222519

申请日：2016-07-28

Applicant: Itron, Inc.

Inventor： Danny Ray Seely

IPC: H04W24/08 ,  H04W24/04

CPC classification number: H04W24/08 ,  H04W24/04

Abstract: A decoder for a modulation scheme is configured to operate close to the radio noise floor. A correlation value may be constantly updated, in an effort to match to a signature to a preamble of a packet. A low clamp value may act as a floor to which a calculated correlation value is set, if it is less than the low clamp value. If a correlation threshold is exceeded, then the correlation value is examined to determine it is a peak value. If the peak is found, power of the preamble is compared to a power threshold that is relative to the radio noise floor. If the power threshold is exceeded, positive correlation is detected. A channel optimizer is used to remove the frequency misalignment. This enables the use of a filter that is approximately equal to the occupied bandwidth of the incoming signal, further rejecting noise and interference.

Abstract translation: 用于调制方案的解码器被配置为在无线电本底噪声附近操作。 可以不断更新相关值，以便匹配到分组的前导码的签名。 如果低钳位值小于低钳位值，则低钳位值可以作为设置计算的相关值的地板。 如果超过相关阈值，则检查相关值以确定它是峰值。 如果找到峰值，则将前导码的功率与相对于无线电本底噪声的功率阈值进行比较。 如果超过功率阈值，则检测到正相关。 通道优化器用于消除频率偏移。 这使得能够使用近似等于输入信号的占用带宽的滤波器，进一步抑制噪声和干扰。

公开(公告)号：US09077487B2

公开(公告)日：2015-07-07

申请号：US13776562

申请日：2013-02-25

Applicant: Itron, Inc.

Inventor： Danny Ray Seely ,  Michael David McNamee

IPC: H04L27/06 ,  H04L1/00

CPC classification number: H04L1/0003 ,  H04L25/14 ,  H04L27/0008 ,  H04L27/12

Abstract: A multichannel radio receiver may include a radio frequency (RF) subsystem and a digital subsystem. The digital subsystem may be configured to use an analog to digital converter (ADC) to sample input. A channelizer bank within the digital subsystem may include a plurality of channelizers. Each channelizer may receive and translate input into a plurality of channels, the channels having widths that are non-uniform and/or spacing (e.g., spacing center-to-center of adjacent channels) that is not regular. The translation may include re-sampling channels at a rate associated with a modulation scheme. A decoder bank may include a plurality of decoders operating in parallel, each to receive input from a channelizer and each associated with a particular modulation scheme. Thus, the multichannel radio may simultaneously receive on a plurality of channels of arbitrary location, arbitrary spacing and/or arbitrary bandwidth, wherein each channel is associated with one of a plurality of modulation schemes.

Abstract translation: 多通道无线电接收机可以包括射频（RF）子系统和数字子系统。 数字子系统可以被配置为使用模数转换器（ADC）来采样输入。 数字子系统内的信道化器组可以包括多个信道化器。 每个信道发送器可以接收并将输入转换成多个信道，信道具有不规则的不均匀和/或间隔（例如，相邻信道的中心到中心的间隔）的宽度。 转换可以包括以与调制方案相关联的速率的重新采样信道。 解码器组可以包括并行操作的多个解码器，每个解码器接收来自信道化器的输入，并且每个解码器与特定调制方案相关联。 因此，多信道无线电可以同时在任意位置，任意间隔和/或任意带宽的多个信道上接收，其中每个信道与多个调制方案之一相关联。

公开(公告)号：US20140242936A1

公开(公告)日：2014-08-28

申请号：US13776476

申请日：2013-02-25

Applicant: ITRON, INC.

Inventor： Danny Ray Seely

IPC: H04B1/10

CPC classification number: H04L27/0008 ,  H04L5/06 ,  H04L27/10 ,  H04L2027/0095

Abstract: A radio may define a channel plan to include one or more channels, and each channel may include a plurality of overlapping filters. Each filter may overlap at least one other filter, such as by an expected bandwidth of an incoming signal. The overlapping filters may extend over a frequency range based in part on an expected frequency error of the incoming signal. Due in part to the overlapping nature of the filters, the incoming signal will be within at least one of the filters. Since only one of the filters must receive the incoming signal, the filters may be narrower than might otherwise be the case, particularly in an application that includes frequency error. Accordingly, the filters may be narrower than their respective channels, and therefore receive less noise and interference. This improves signal-to-noise and improves the quality of the link and range.

Abstract translation: 无线电可以定义包括一个或多个信道的信道规划，并且每个信道可以包括多个重叠的过滤器。 每个滤波器可以与至少一个其他滤波器重叠，例如与输入信号的期望带宽重叠。 重叠滤波器可以部分地基于输入信号的预期频率误差而在频率范围上延伸。 部分由于滤波器的重叠性质，输入信号将在至少一个滤波器内。 由于只有一个滤波器必须接收输入信号，所以滤波器可能比其他情况更窄，特别是在包含频率误差的应用中。 因此，滤波器可能比其相应的信道更窄，因此接收到更少的噪声和干扰。 这提高了信噪比，提高了链路和范围的质量。

公开(公告)号：US20140241468A1

公开(公告)日：2014-08-28

申请号：US13776548

申请日：2013-02-25

Applicant: ITRON, INC.

Inventor： Danny Ray Seely

IPC: H04L1/00

CPC classification number: H04L1/0003 ,  H04L25/14 ,  H04L27/0008 ,  H04L27/12

Abstract: A multichannel radio receiver may include a radio frequency (RF) subsystem and a digital subsystem. The RF subsystem may be configured to provide analog information associated with a radio band to an analog to digital converter (ADC). The ADC samples the analog input and sends digital output to the digital subsystem. The digital subsystem may be configured with one or more channelizers and one or more decoders. A channelizer within the digital subsystem may filter and re-sample the digital output to result in a channel plan having a desired bandwidth and a desired sample rate. The sample rate may be selected for compatibility with a decoder. The decoder may have design specifications based in part on a modulation scheme to be decoded. The design specifications may indicate the desired sample rate to be provided by the channelizer.

Abstract translation: 多通道无线电接收机可以包括射频（RF）子系统和数字子系统。 RF子系统可以被配置为向模数转换器（ADC）提供与无线电频带相关联的模拟信息。 ADC对模拟输入进行采样，并将数字输出发送到数字子系统。 数字子系统可以配置有一个或多个信道解码器和一个或多个解码器。 数字子系统内的信道化器可以对数字输出进行滤波和重新采样，以产生具有期望带宽和期望采样率的信道规划。 可以选择采样率以与解码器兼容。 解码器可以部分地基于待解码的调制方案来进行设计规范。 设计规范可以指示要由通道器提供的期望采样率。

公开(公告)号：US20140241178A1

公开(公告)日：2014-08-28

申请号：US13776528

申请日：2013-02-25

Applicant: ITRON, INC.

Inventor： Danny Ray Seely ,  Jeffrey Steele Sanders

IPC: H04W24/08

CPC classification number: H04W24/08 ,  H04W24/04

Abstract: A multichannel radio receiver configured for real-time radio channel assessment is described herein. In one example, a radio frequency (RF) front end provides a frequency spectrum which is converted into a digitized spectrum. Within a digital subsystem, resources (e.g., software or a hardware device) may analyze channels or portions of spectrum within the digitized spectrum for a packet error rate (PER) at a plurality of power levels and a plurality of modulation schemes. The analysis may result a required received signal strength indicator (RSSI) that is needed to result in a particular read reliability requirement (RRR). Using the required RSSI, endpoints communicating with the multichannel radio may be associated with a channel(s), modulation scheme(s) and/or power level(s) that results in the RRR. The analysis may be performed by one or more resources operating in parallel and operating in the background to other communications between the endpoints and multichannel radio receiver.

Abstract translation: 本文描述了被配置用于实时无线电信道评估的多信道无线电接收机。 在一个示例中，射频（RF）前端提供被转换成数字化频谱的频谱。 在数字子系统内，资源（例如，软件或硬件设备）可以在多个功率电平和多个调制方案中分析数字化频谱内的频谱或分量差错率（PER）的频谱或部分。 分析可能导致需要的接收信号强度指示符（RSSI），以产生特定的读取可靠性要求（RRR）。 使用所需的RSSI，与多信道无线电通信的端点可以与导致RRR的信道，调制方案和/或功率级相关联。 分析可以由并行操作的一个或多个资源来执行，并且在后台操作在端点和多信道无线电接收机之间的其他通信。