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Fast self-optimization self-adaptive signal processing method and device of coherent communication technology

A technology of adaptive signal and communication technology, which is applied in the field of fast self-optimized adaptive signal processing, and can solve problems affecting signal processing performance, etc.

Active Publication Date: 2008-09-24
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

Although the entire algorithm of Zhu Weiqing's scheme reduces the amount of computation and has good performance, the simple averaging operation used by DC in his scheme still affects the improvement of signal processing performance

Method used

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  • Fast self-optimization self-adaptive signal processing method and device of coherent communication technology
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  • Fast self-optimization self-adaptive signal processing method and device of coherent communication technology

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Embodiment Construction

[0104] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0105] Such as figure 1 As shown, the present invention still uses DC, DFE and MCPC to work together to form an underwater acoustic coherent communication processing device, but the feature of the present invention is that DC, DFE and MCPC all use the FOLMS algorithm, which improves the previous work of Zhu Weiqing et al. Where DC uses a simple averaging operation.

[0106] according to figure 1 In the signal processing process shown, the received signal adopts space diversity technology, assuming that there are k={1, 2,..., K} receiving array elements, and the received signal is phase compensated by K channel phase compensators, K Channel input signals are optimized and weighted by the diversity combiner and simplified into P (P≤K) channel output signals, which are sent to the equalizer for processing, and then the symbol judgment output is c...

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Abstract

The invention discloses a fast self-optimizing self-adaptive signal processing method and processing device of a coherent communication technology as well as a coherent communication machine which comprises the processing device. The method comprises the steps: a signal is received; phase compensation is carried out on the signal; the signal is simplified and outputted through a diversity combiner; the signal that is simplified and outputted is processed through an equalizer; the signal outputted by the equalizer is carried out symbol judgment, the signal is outputted and simultaneously feeding back to the equalizer to generate an error signal. The device comprises a phase compensation unit, a diversity combiner unit, a self-adaptive judgment feedback equalizer unit, an error signal unit and a self-adaptive updating control unit that are sequentially connected in order. The self-adaptive updating control unit adopts a fast self-optimizing LMS algorithm to update the phase, the diversity combiner parameters and the equalizer parameters. The invention has a better signal processing performance, a lower bit error rate as well as a less calculation amount and saves the hardware cost.

Description

technical field [0001] The invention relates to signal processing technology, in particular to a fast self-optimizing adaptive signal processing method and device of coherent communication technology. Background technique [0002] In the field of coherent communication, for example, the underwater acoustic channel in underwater acoustic communication is a multi-path, time-varying and dispersive channel. Time diffusion; and due to the movement of communication equipment and other carriers, as well as the movement of the channel interface and medium, various movements cause these pulses to produce Doppler frequency shifts and produce Doppler spread. The speed of sound in water is about 1500m / s (meter / second), and these motion speeds mentioned above cannot be ignored compared with the speed of sound, making the Doppler spread quite serious. For the above reasons, underwater acoustic channels are often referred to as time-delay and Doppler double-diffusion channels. Moreover, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/00H04L27/00H04L7/00
Inventor 朱维庆朱敏
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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