Multichannel array signal generating method and device

Abstract

The invention discloses a multichannel array signal generating method and a device. The device comprises a signal parameter setting module, a shift register, a phase inverter network module, a switch matrix, a low pass filter and a level switch circuit, wherein the signal parameter setting module is used for realizing the selection of signal frequency / pulse width / array element position / wave beam forming direction; the shift register and the phase inverter network module are used for generating multiple paths of delayed / initial phase equidifferent square signals of which the frequency is f=fclk / 2N, wherein fclk is clock signal frequency, and N is the number of the shift register; the switch matrix is used for selecting the square signal with corresponding delay / initial phase from a square signal assembly according to the needed signal parameter; the low pass filter is used for shaping multiple paths of square signals to obtain multiple paths of sine wave signals; and the level switch circuit is used for carrying out level switch on multiple paths of sine wave signals. The invention is suitable for simulating the formation of a transmitting / receiving signal by a single-frequency pulse signal wave beam, has artful design and has the advantages of convenient realization, small volume, low cost, low energy consumption and multiple paths.

Description

technical field [0001] The invention relates to the technical fields of sonar, radar and wireless communication, in particular to the related technology of receiving / transmitting beam formation in a multi-channel transducer / antenna array system. Background technique [0002] Beamforming usually works in conjunction with acoustic wave transmitting / receiving transducer arrays or electromagnetic wave transmitting / receiving antenna arrays, and is widely used in sonar, radar, communication and other fields. Beamforming includes two parts: beamforming on received signals and beamforming on transmitted signals: [0003] (1) Beamforming the received signal: In order to make the transducer / antenna array strengthen the signal arriving from one or more specific directions, the basic beamforming method delays the signal received by each array element according to the beam direction. , then add the time-delay-aligned signals to obtain a beam output pointing to a specific direction. Suc...

AI Technical Summary

Problems solved by technology

Like this, this technology just has following shortcoming: the pin number resource of single-chip microcomputer, FPGA, CPLD is limited, and D-A price is more expensive, and volume is larger, and power consumption is larger; Parallel D-A needs more data / control pins, The serial D-A has fewer data / control pins and the conversion speed is slower, and the synchronization of data updates between each D-A is not easy to control, and the implementation process is complicated

These shortcomings are especially obvious when the number of array signal channels required is large

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