A Design Method of Orthogonal Discrete Frequency Coded Signal in Digital Domain

A discrete frequency, coded signal technology, applied in the field of radar communication, can solve problems such as low design efficiency, weak global optimization ability, and complex design principles.

Inactive Publication Date: 2018-04-06
XIDIAN UNIV
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  • Abstract
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Problems solved by technology

[0004] However, the design principle of the above method is complex, the design efficiency is low, and there are shortcomings such as weak global optimization ability.

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  • A Design Method of Orthogonal Discrete Frequency Coded Signal in Digital Domain
  • A Design Method of Orthogonal Discrete Frequency Coded Signal in Digital Domain
  • A Design Method of Orthogonal Discrete Frequency Coded Signal in Digital Domain

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Embodiment Construction

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] For the convenience of description, the following definitions are first made:

[0059] NASP: Normalized autocorrelation sidelobe peaks (excluding the main lobe).

[0060] NCP: Normalized cross-correlation peak.

[0061] ODFCW: Orthogonal Discrete Frequency Coded Waveform.

[0062] DFCW: Discrete Frequency Coded Waveform.

[0063] DFCDW: Digital Domain Discrete Frequency Coded Waveform (Discrete Frequency Coded Digital Waveform).

[0064] ODFCDW: Dig...

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Abstract

The invention provides a design method for a digital domain orthogonal discrete frequency coded signal. The design method can simplify a design principle of an orthogonal discrete frequency coded signal, increases design efficiency, and has higher practicality. The design method comprises the steps of: (1) determining sub-pulse number N, sub-pulse duration T and sampling rate Fs of DFCDW; (2) generating M DFCDW sets which are different from one another, wherein each DFCDW has low self-correlation sidelobe energy, and encoding frequencies of sub-pulses are different; (3) selecting L DFCDW with low normalized cross-correlation peak value weighted sum from the M DFCDW sets; (4) and extracting optimized frequency codes corresponding to L*N from the L DFCDW.

Description

technical field [0001] The present invention relates to the technical field of radar communication, in particular to a design method of an orthogonal discrete frequency coded signal in a digital domain, which can be used as a transmitting signal of a MIMO radar. Background technique [0002] In order to avoid mutual interference between channels, MIMO radar requires the transmission signals to be orthogonal to each other (see literature: Fishler E, Haimovich A, Blum R S, et al. MIMO Radar: An idea whose time has come [C] / / IEEE Int. Conf. Radar. Philadelphia, P A, 2004: 71-78.). Orthogonal Discrete Frequency Coded Waveform (ODFCW) can be used as a typical quadrature transmit waveform of MIMO radar. Discrete Frequency Coded Waveform (DFCW) is a large bandwidth signal with good range resolution performance and narrow instantaneous bandwidth, and is widely used in wideband radar systems. [0003] Orthogonal discrete frequency coded waveform design is to optimize the sequence o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G01S7/282
CPCG01S7/02G01S7/282
Inventor 杨明磊陈伯孝张威
Owner XIDIAN UNIV
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