Signal Transmitting and Processing Method Combining Real Time Reversal and Virtual Time Reversal
A technology of signal transmission and processing method, applied in the direction of sounding equipment, instruments, error prevention/detection using return channel, etc., can solve the problem of reducing the probability of missed detection, etc., to improve the effective detection time ratio, shorten the detection period, and reduce the pressure Effect
Active Publication Date: 2019-10-22
INST OF ACOUSTICS CHINESE ACAD OF SCI
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[0004] The purpose of the present invention is to overcome the above-mentioned defects in the present single use of real time-reversal and virtual time-reversal, and propose a method of combining real time-reversal and virtual time-reversal two transmission modes, which not only improves the effective detection time ratio , which reduces the probability of missed detection, and makes full use of the computing power of the hardware; the method of the present invention integrates the idea of virtual time-reversal into the stage of real time-reverse round-by-clock signaling, and realizes multiple rounds of launching, that is, in the "preparation" While retransmitting the signal, target detection can still be achieved. This detection process is carried out on the server at the receiving end. System Detection Capabilities
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[0022] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0023] Such as figure 1 As shown, a signal transmission and processing system combining real time reversal and virtual time reversal. The system is a separate transceiver and includes a transmitter and a receiver; the transmitter includes: transmitter server, transmitter DSP, transmitter And launch array, said launch array includes n s Array elements, the receiving end includes: a receiving end server, a receiving DSP, a receiver and a receiving array, and the receiving array includes n r Array element
[0024] Based on the above system, the present invention provides a signal transmission and processing method combining real time inversion and virtual time inversion, and the method includes:
[0025] Step 1) The i-th (i=1,2,...,n s ) Array elements transmit signals s(t) in turn (transmission interval is T 1 ), a total of M is emitted 1 wheel;
[0026] S...
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The invention provides a real time reversal and virtual time reversal combined signal transmitting and processing method. The method comprises the following steps: ns array elements of a transmitting array orderly transmit a signal s(t) for M1 turns; nr array elements of a receiving array receive the signal transmitted by the transmitting array, and computes the mean value of the signal and returns to the transmitting side server when receiving the signal sent by all transmitting array elements for M1 turns; the transmitting side server performs the time reversal on the received data and downloads the time-reversed data to the transmitting DSP cache; the receiver side server performs the virtual time reversal by using the M1 turns of signal saved at the local to perform the target detection in the data download time slot; and then the ns transmitting array elements of the transmitting side server simultaneously transmit a time reversal signal of a receiving array element focused at the receiving side; the array element of the receiving array receives the signal and the signal is used for the target detection. Compared with the traditional real time reversal, the effective detection time proportion is improved by using the method disclosed by the invention, and the target detection period is shortened.
Description
Technical field [0001] The invention relates to the field of digital signal processing, in particular to a signal transmission and processing method combining real time inversion and virtual time inversion. Background technique [0002] Time reversal is a technique that reverses the signal along the time axis during retransmission or post-processing. This technology makes full use of channel information to redistribute the transmitted energy at the receiving end to achieve the effect of focusing energy at a specified position. It is widely used in ultrasonic testing, underwater acoustic communication, and underwater acoustic detection. [0003] Time reversal technology can be divided into real time reversal and virtual time reversal. The signal transmission and processing procedures of the two are slightly different, and they have their own advantages, disadvantages and applications. If you consider that both the transmission and reception are in an array, in the virtual mode, onl...
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IPC IPC(8): H04L1/18G10K11/26
Inventor 许枫唐浩杨娟安旭东
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI