公开(公告)号：US09136861B1

公开(公告)日：2015-09-15

申请号：US14544851

申请日：2015-02-25

Applicant: Elta Systems Ltd.

Inventor： Baruch Fleishman

IPC: H03M1/20

CPC classification number: H03M1/201 ,  H04B1/0007 ,  H04B7/086

Abstract: A system and method for enhancing a dynamic range of a beamforming multi-channel digital receiver are described. The receiver comprises a plurality of receiving channels, each including an analog-to-digital converter configured for converting an analog input signal generated by antenna elements into a digital signal. A “spatial” dither signal is used to decorrelate the quantization noise of the analog-to-digital converters. A dither signal is generated and split into a predetermined number of coherent dithering signals. The method includes providing predetermined time delays to the coherent dithering signals, and adding the delayed coherent dithering signals to the input signals in each receiving channel, correspondingly, thereby creating a dither signal equivalent to a signal arriving from a certain specific direction out-of-field-of-view of the antenna array. Removing of the dither signal based on the direction of arrival, is implemented during beamforming signal processing, thus enhancing the dynamic range of electromagnetic signals arriving within a field-of-view of the antenna array.

公开(公告)号：US20150244387A1

公开(公告)日：2015-08-27

申请号：US14544851

申请日：2015-02-25

Applicant: Elta Systems Ltd.

Inventor： Baruch Fleishman

IPC: H03M1/20

CPC classification number: H03M1/201 ,  H04B1/0007 ,  H04B7/086

Abstract: A system and method for enhancing a dynamic range of a beamforming multi-channel digital receiver are described. The receiver comprises a plurality of receiving channels, each including an analog-to-digital converter configured for converting an analog input signal generated by antenna elements into a digital signal. A “spatial” dither signal is used to decorrelate the quantization noise of the analog-to-digital converters. A dither signal is generated and split into a predetermined number of coherent dithering signals. The method includes providing predetermined time delays to the coherent dithering signals, and adding the delayed coherent dithering signals to the input signals in each receiving channel, correspondingly, thereby creating a dither signal equivalent to a signal arriving from a certain specific direction out-of-field-of-view of the antenna array. Removing of the dither signal based on the direction of arrival, is implemented during beamforming signal processing, thus enhancing the dynamic range of electromagnetic signals arriving within a field-of-view of the antenna array.

Abstract translation: 描述了用于增强波束成形多通道数字接收机的动态范围的系统和方法。 接收机包括多个接收通道，每个接收通道包括被配置用于将由天线元件产生的模拟输入信号转换为数字信号的模拟 - 数字转换器。 “空间”抖动信号用于去相关模拟数字转换器的量化噪声。 产生抖动信号并将其分成预定数量的相干抖动信号。 该方法包括向相干抖动信号提供预定的时间延迟，并相应地将延迟的相干抖动信号加到每个接收信道中的输入信号上，从而产生相当于从某个特定方向到达的信号的抖动信号， 天线阵列的视场。 在波束形成信号处理期间实现基于到达方向去除抖动信号，从而增强到达天线阵列的视场内的电磁信号的动态范围。