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Radar communication integrated waveform design method

A waveform design and radar technology, applied in multi-carrier systems, modulated carrier systems, radio wave measurement systems, etc., can solve the problem of low spectrum utilization and achieve the effect of improving spectrum efficiency

Active Publication Date: 2018-12-11
CHONGQING UNIV +1
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  • Application Information

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Problems solved by technology

But these modulation methods belong to low-order modulation, and the spectrum utilization rate is low

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  • Radar communication integrated waveform design method

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Embodiment Construction

[0012] In the radar communication integration technology, the transmitter transmits the radar communication integration signal, so that the radar and communication share the transmitter. The linear frequency modulation (LFM) pulse generated by the radar is used as the carrier of the communication signal to realize the integrated waveform design. Among various communication digital modulation methods, 16QAM is a high-order modulation and has the characteristics of high spectrum utilization.

[0013] Input communication baseband signal sequence {a i} length is T, contains 4N bits in total, each bit a i =±1, the time width of each bit is T a , where i=1,2,...,4N, and T=4N·T a ; The baseband sequence passes through the bit mapping module, and outputs two parallel symbol sequences {b n} and {c n}, each symbol sequence contains N symbols, each symbol has 4 values, respectively ±1 and ±3, and the time width of each symbol is T bc , where n=1,2,...,N, and T bc = 4T a .

[001...

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Abstract

The invention discloses a radar communication integrated waveform design method. The method is characterized by comprising steps: an input communication baseband signal sequence {ai} passes through abit mapping module, and two paths of parallel symbol sequences {bn} and {cn} are outputted, wherein the 16 conditions of each continuous four input bits of the bit mapping module are in one-to-one correspondence with the 16 conditions of the outputted symbol sequences; the two paths of symbol sequences {bn} and {cn} outputted by the bit mapping module are multiplied by linear frequency modulationorthogonal carriers sI(t) and sQ(t) generated by a local oscillator module respectively, wherein the two paths of output signals after multiplication during the existence period of symbols bn and cn are p(t) and q(t) respectively; and the final output signals for the radar communication integrated waveform are z(t)=p(t)+q(t). Linear frequency modulation pulses are used as 16QAM modulation signal carriers, the spectrum utilization rate is improved, and the method can be used in the technical field of radar communication integration.

Description

technical field [0001] The invention relates to the field of radar communication integration, in particular to a radar communication integration waveform design method. technical background [0002] In radar communication integration technology, the transmitter can adopt integrated waveform design, that is, the organic combination of radar detection waveform and communication waveform. The design method of this shared waveform is to realize communication without affecting the radar detection function. The modulation information carried on the waveform is demodulated in the communication signal processing module of the receiver to realize the communication function; the echo of the waveform is processed and analyzed by the radar signal processing module in the receiver to obtain information such as the position, speed and shape of the target. The Linear Frequency Modulation (LFM) signal is a common radar pulse waveform. Using this waveform as a carrier, it can be combined and...

Claims

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Application Information

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IPC IPC(8): G01S7/282H04L27/34H04L27/36
CPCH04L27/34H04L27/362G01S7/282
Inventor 曾浩吉利霞赵云霄方贝贝董涛殷杰
Owner CHONGQING UNIV